broadband digital installer

When installing a modular telephone jack by mounting and wiring the jack using a screw-down post at the customer premises. how much insulation should be stripped from each individual copper conductor with a wire stripper?

1/2 inch to 3/4 inch

What is the maximum data rate of 802.11b network?

11Mbps

One particular concern for a VoIP customer with a home security system is the loss of power because

A VoIP system without proper battery-backup can cause alarm system owners to lose their monitoring capability

Generally speaking, a wide area network(WAN) can be described as

A network comprised of several local area networks(LAN) and metropolitan area networks(MAN) interconnected into a single network covering a large geographic area

What does a home network printer have that enables it to operate through a network connection?

A network interface card

Topology refers to the arrangement used in routing and connection inside wiring to the NID or distribution device. How is the star topology arranged?

A separate twisted-pair cable is routed to each modular jack from the NID

What could result if a customer's network has a data throughput of 6 megabit per second and three different high definition TV data streams of 12 Mbps each are being received simultaneously?

All three HDTVS will likely experience glitches, annoying visual artifacts, or buffering in the programs being watched.

In the event of a power failure, an EMTA can rely upon a backup power source provided by

An internal battery that has the capacity to operate the EMTA up to eight hours

In accordance with requirements set by the NEC several different cable types can be used for residential inside wiring. What is a CM cable?

An unshielded twisted-pair cable used indoors

What message must a cable modem receive from the downstream signal in order to begin a transmitting relationship with the cable modem

An upstream channel descriptor (UCD) message, a symbol timing message (SYNC), and a bandwidth allocation message (MAP).

To help avoid and identify possible customer premises equipment problems after a successful installation, the skilled VoIP installation technician will

Ask the customer about devices which might be connected to the POTS line, and inform the customer that these devices may not work with VoIP telephone service.

Commonly located in or close to the alarm panel, the RJ31X jack serves as a passive device

Between an alarm panel and the premises wiring to enable line seizures and outbound dialing in alarm conditions.

Which protocol is best for exchanging data over short distances?

Bluetooth

Which wiring topology starts at the telephone distribution device, uses on twisted-pair cable to route through a customer premises from one modular jack to the next and terminates at the last modular jack location?

Bus

Which type of twisted-pair inside wiring installation tool accommodates the varying surface shapes of unshielded twisted-pair cables?

Cable stripper

What is a requirement of carrier class voice over Internet protocol telephone service?

Carrier class VoIP telephone service requires operation in the event of a power failure.

All telephone calbes are labled with either a level or category number that designates the cable's performance criteria. How do CAT-1,2,3 cables compare to Cat-5e and higher cables?

Cat 1,2,3 are used only for voice applications, Cat 5e and higher are used for voice and data.

Which of the following platforms utilize iControl services?

Comcast Xfinity Home

A constant bit rate (CBR) telephone system is considered to be circuit-switching technology because the analog audio signal is

Converted into a digital DSO circuit and switched to other cable telephony customers or to the telephone company's network

The Customer access side of the NID is also referred to as the demarc, which marks the point in the network where

Corporate responsibility ends and customer responsibility begins

What was added to DOCSIS 1.1 to support PacketCable, an IP-based platform for telephone service, over a DOCSIS access network?

DOCSIS 1.1 added quality of service (QoS) controls, enhanced security, and adaptive equalization in the upstream path for improved data throughput to meet the requirements of PacketCable.

What advantage is there for PacketCable voice packets being delivered to the public switched telephone network over a managed IP backbone?

Delivery of IP voice packets over the PacketCable managed backbone enables the packets to maintain their priority through the entire network to the PSTN and maintain service quality comparable to POTS.

What is the trend that desktop computers are moving toward in many homes?

Desktop computers are moving toward being used as a home network server.

The best way to prevent equipment incompatiblity between a VOIP installation and home security system starts with

Ensuring the VoIP provider, the home security company, and the end user communicate with one another prior to installation.

As part of the initialization process, an EMTA identity is established with the CMTS by

Entering its MAC address, and other information that identifies the customer, into the cable operator billing system

Generating a dial tone in either a traditional telephone call or a packetcable voice over internet protocol is similar, except

Equipment in the central office for POTS senses the change in voltage and generates a dial tone where the EMTA senses the change and generates a dial tone in packetcable

Which type of modular telephone line cord is preferable?

Factory manufactured

Common devices that can be affected by a switch to VoIP telphony include

Fax machines, medical alert consoles, POS terminals, hearing impaired service equipment

How many home network device categories have been defined by the DLNA?

Five, the media server, digital media player, digital media renderer, digital media controller, and digital media printer

A key step in avoiding VoIP installation problems with common devices is to

Have customers verify that all their devices work properly before beginning

Which release of the IEEE 802.11 specification, was the first widely accepted wireless standard to be branded with the wi-fi name?

IEEE 802.11b

How are Internet protocol (IP) and modem configuration information sent to a DOCSIS modem?

IP and modem configuration information originates with a provisioning server and are sent to the DOCSIS modem through the cable modem termination system (CMTS) in a proxy arrangement.

What internet protocol (IP)connectivity modes are supported in DOCSIS 3.0 and 3.1?

IPV4 only, IPV6 only, alternate provisioning mode(APM) and dual-stack provisioning mode (DPM)

What happens if a DOCSIS modem is unable to establish time-of-day (ToD) registration?

If a modem is unable to establish ToD before registration, the modem can proceed to an operational state and periodically attempt to re-establish ToD.

In a single family residence, the telephone company interface is typically located

In the NID on the outside of the customer premises

What is one operation to check after adding a new modular telephone jack?

Inbound call capability

To certify the reliability of the drop system, a customer's existing cable television service should be checked because

Ingress, beats, and noise will be revealed in analog TV channels

Which protocol is backward compatible with X10 while expanding home automation to include wireless communication?

Insteon

Which of the following home automation platforms does not support Wi-Fi devices?

Iris, Nexia

In a multiline telephone installation the technician should check the existing wiring for crosstalk by

Listening for tones on one line while dialing out on another line

What is the first step in prequalifiying a new customer's existing telephony service?

Locate all telephones and jacks

What functionality do many Blu-Ray players have, besides playing back discs?

Many Blu-ray players have built in media streaming capabilities through a wired or wireless network connection.

Using UDP(user datagram protocol), VoIP packets travel through the network experiencing

Minimal delay in exchange for less reliable delivery of data packets, and with no packet overhead

For an EMTA to receive an authorization key for telephone service, the MAC address

Must be assigned to a customer account in the billing system database which updates the CMTS

A consideration to make when choosing the location to install an EMTA is whether it is

Near an unswitched electrical outlet to prevent inadvertent service interruptions

what is the role of the router in the home media network?

Operating between the modem and the rest of the network, the router assigns IP address to all of the network elements, then uses the IP addresses to direct traffic among network elements

Why is packet-switching technology considered to be more efficient than circuit switching technology?

Pack-switching operates over a shared network and occupies the network only for the duration of time it takes to transport the data packet.

A modular phone jack can contain either six positions or eight positions. Pinning assighnmets for each position vary, depending on number of wires attached and the wiring standards used. How do these pinning assignments affect the placement of pair 1 of a twisted-pair cable?

Pair 1 is always connected to the center two pins

In addition to contacting their security company to ensure that VoIP telephony is compatible with their home security system, prior to installation, homeowners should

Perform an alarm system test prior to having VoIP installed

Standard color codes are used to identify the tip wires and the ring wires in multiple pairs of wires. This ensures that the proper connections are made among wires,plugs, and jacks throughout the inside wiring system. What happens if a tip wire is connected to a ring pin?

Polarities are reversed, and the telephone circuit may not work properly.

Power line carrier technology is communicated over which of the following mediums?

Power lines

What is a risk of performing automated measurements on a sample of channels, instead of all channels?

Problems in unmeasured channels may go undetected

The NID generally consists of two separate compartments. Which of the following components are contained in the craft access area of the NID?

Service wire connections, cross-connect wire connections, grounding connections

What entertainment multimedia elements are capable of receiving and converting streamed over the top media into a television format?

Streaming media players, many blu ray disc players, gaming consoles, and smart tvs

In the DOCSIS HFC access network, an embedded multimedia terminal adapter (EMTA) includes

Telephone jacks and circuitry to send and receive telephone calls over the DOCSIS network

Which customers were originally targeted to use digital terminal adapters (DTA)?

The DTA was originally targeted to those customers with analog TVs that subscribed to basic-only service.

Prior to beginning an installation of telephone service, a technician should check the worlk order to verify

The MAC address and serial numbers listed match the ones on the EMTA being installed

Which connection scheme needs to be followed in order for an alarm system to continue working after a VoIP installation?

The RJ31X jack is the first device that the twisted-pair wires from the EMTA are connected to.

During a cable telephone installation where there is a monitored alarm system, the EMTA must be connected to

The alarm system before connecting to the customer's telephones to eliminate the possibility of disabling the alarm by taking a phone off-hook

If an RJ31X jack is improperly wired parallel and an alarm condition is present

The alarm system dials out to the central station, but it cannot seize the line

What is the definition of a home media network?

The home media network is defined as a collection of computer and media devices connected together on a single network

Which OSI reference model layers does the MAC layer in the DOCSIS overlap?

The physical and DATA Link Layers.

A network attached storage element should be connected to what element in the home media network?

The router

PacketCable voice over Internet protocol (VoIP) is differentiated from VoIP service offered by other providers by

The service quality from the PacketCable managed IP network

Broadband cable operators view TV Everywhere as the answer to what competitive service?

The streaming of media (television programs, movies, music, etc.)into data packets that can be received over the internet or over-the-top (OTT)

To have the alarm panel isolate itself from the premises wiring and capture the phone line to alert the central station in case of an alarm condition, the RJ31X jack requires

The tip and ring from the EMTAbe terminated to the green and red terminals in the RJ31X jack, and the premises wiring be terminated to the brown and grey terminals in the RJ31X jack

Inside wiring for residential buildings may use either quad station wire or twisted-pair wire. What is an advantage of using twisted-pair over quad station wire?

The twisted wires minimize induction and crosstalk from other wires in the same cable

The tier that enables a cable operator to deliver voice over Internet protocol (VOIP) service comparable in quality and reliability to POTS< by specifying and controlling the delivery of VoIP packets, is

Tier 1, primary line VoIP

If a residence contains many modular jacks , a distribution device may be used in addition to the NID. What components are contained in a distribution device?

Tip and ring screw or punch-down terminals, which are used to connect the inside wiring.

When installing a new IDC jack at the customer premises, why is it important to ensure that the wire pairs are untwisted a maximum of 1/2 inch?

To maintain CAT -5e electrical characteristics

After mounting and wiring a new modular telephone jack in a star installation where should the UTP cable from the new modular jack be connected?

To the tip and ring screw terminals or IDC on the telephone distribution device

What is the last step in a cable modem's registration?

When the CMTS receives a registration acknowledge (REG-ACK) message confirming the modem's registration

Which protocol only utilizes the powerline system within the customer premises to send and receive commands to connected devices?

X10

Which of the following ZigBee devices do not have the ability to route commands and can only send and receive commands?

ZigBee End device

Which of the following is an open source protocol that utilizes mesh networking to relay commands to connected devices within the customer premise?

Zigbee

A modular plug contains four, six, or eight pin positions. Each position is number and is used to terminate a specific tip or ring wire from a quad or twisted-pair cable. How are the pins on a modular jack numbered?

left to right, with the locking tab down

An EMTA must have an internal battery installed to

qalify as a carrier class telephone service and enable uninterrupted operation during short power outages

When drilling a hole through an exterior wall to route a telephone cable to the interior, how should the hole be drilled?

sloped upward from the outside and just large enough for the diameter of the cable.

Out of the 40 channels that bluetooth Low Energy works within the 2.4 GHz spectrum, how many of those channels are advertising channels?

three

When routing and attaching interior unshielded twister-pair cable, what is the minimum seperation distance you should maintain between any telecommunications or data cable and electrical power conductors?

two inches

What is a cable modem service group?

A cable modem service group is defined as the complete set of downstream and upstream DOCSIS channels that reach a single cable modem.

What is the name of the server that provides a cable modem's IP address?

A dynamic host configuration protocol (DHCP) server provides the CMTS with the modem's IP address.

What is typically connected to the cable modem so that multiple computers can connect to the Internet through a single cable modem?

A router is connected to the cable modem so that multiple computers can connect to the Internet through a single cable modem.

What device can be installed with a cable modem to enable internet access to two or more devices in the customer premises?

A router with a built in multi-jack Ethernet splitter

What technology enables individual digital set-top boxes (STB) to receive authorization to access-encrypted program content via a subscriber management system (SMS), aka billing system?

Addressable technology enables individual digital STBs to receive authorization to access-encrypted program content via an SMS.

What two enhanced communications access technologies were introduced in DOCSIS 2.0 to support wider bandwidth upstream carriers and higher orders of modulation?

Advanced time division multiple access (A-TDMA) and synchronous code division multiple access (S-CDMA) were introduced in DOCSIS 2.0 to support wider bandwidth upstream carriers and higher orders of modulation.

What forced customers to choose between the integrated entertainment system furniture cabinet and upgraded system components?

Advances in technology, such as color television, upgraded turntables, etc.

How does a DOCSIS modem determine what frequency to use for transmitting data upstream in the return path?

After synchronization, the modem remains in receive mode in order to obtain an upstream channel descriptor (UCD) message. That message is broadcast in 2 second intervals by the CMTS to provide the modem with the parameters, or instructions, concerning available upstream channels on which the modem might be able to transmit.

What message does the DOCSIS 3.1 modem send after synchronizing to the CMTS?

After the modem is synchronized to the CMTS and finds that it is operating as a DOCSIS 3.1 modem, the modem sends a Bonded Initial Ranging Request message to the CMTS.

What instructions might a CMTS send in a RNG-RSP message to modify the modem's transmission parameters?

An adjustment to the modem's timing interval, transmit frequency, or power level.

What does DOCSIS 3.1 seek first when synchronizing with the CMTS in order to receive operational information?

An orthogonal frequency division multiplexing (OFDM) channel that contains a set of contiguous subcarriers called the PHY link channel (PLC)

What should you do if the customer asks you to set up and configure a router during the installation of high-speed data service?

Ask your supervisor for clarification of your company policy for the set up and configuration of customer-owned HAN equipment.

What advantages are there to performing automated measurements with an SLM?

Automated measurements help ensure consistent measurement practices among different technicians.

Why are the data throughput rates for both downstream and upstream in DOCSIS networks asymmetrical?

Because the narrower bandwidths and lower orders of modulation for the return path carriers .

One obstacle to wide-spread adoption of early voice over internet protocol applications was

Both calling and receiving parties had to have computers that were turned on and running VocalTec software.

Some cable operators charge an additional fee when the amount of downloaded data during a billing cycle exceeds a prescribed limit. How might a customer unknowingly approach these limits?

By streaming and downloading high-content data, such as movies and TV shows in high-definition throughout the billing cycle.

Why is constant bit rate (CBR) telephony considered to be a circuit switching technology?

CBR is considered to be circuit switching technology because the circuits are switched from customer to customer among equipment at the headend, and then into the PSTN.

How do cable operators ensure that only paying customers are receiving digital television service?

Cable operators prevent unauthorized reception of DTV services by scrambling or encrypting the services.

Using a digital signal analyzer, what measurements are typically taken to troubleshoot and diagnose a digital television signal?

Carrier average power level, modulations error ratio and bit error rate

What could happen to a modem's upstream transmit level if the drop attenuation level changes?

Changes in the drop attenuation resulting from the addition or removal of splitters, directional couplers, or lengths of cable could cause a change in levels from the cable modem.

Why is packet switching considered to be an efficient alternative to the circuit switching technology used by the telephone companies?

Circuit switching technology provides a dedicated circuit with a continuous connection during the length of a telephone call; therefore, during pauses in conversation the circuit goes unused, as does the transmit portion of the circuit when listening. In packet switching, a connection is maintained only for the duration of the transport of the data packet.

What criteria does the DOCSIS certification process ensure?

Compliance with the DOCSIS standard and interoperability between suppliers

What protocol is used to download a DOCSIS modem's configuration files?

Configuration files are downloaded using the trivial file transfer protocol (TFTP) that allows the modem to download software and other data without a special password or ID.

Which broadband cable architecture type was the first Data Over Cable Service Interface Specification (DOCSIS) designed to operate?

DOCSIS 1.0 was designed to operate on legacy tree-and-branch and hybrid fiber/coax (HFC) architectures.

Which DOCSIS version was the first to provide an option for raising the top frequency of the upstream specturm to 85Mhz in order to create enough bandwidth for upstream carriers from modems running on previous DOCSIS versions?

DOCSIS 3.0

Which version of the DOCSIS included the option to increase the top frequency of the upstream to 85 MHz?

DOCSIS 3.0

What is the purpose of long-loop automatic gain control (AGC) in the DOCSIS network?

DOCSIS specifies long-loop automatic gain control (AGC) to attain upstream RF carrier levels in the network that remain at system specifications.

What could be used to define modem classes or service levels that would be prioritized for ranging after a massive outage?

Device class identification (DCI) is an optional phase in the modem's initialization that enables the cable operator to define special modem classes or service types that would be prioritized for ranging after a massive outage.

What functionality has been added to many signal level meters (SLM) to measure specific parameters of a digital modulation carrier containing digital television and DOCSIS signals?

Digital signal analyzer functionality

If the customer demonstrates that they are internet savvy what shoud be the next step in the customer education portion of the installation?

Direct the customer to the cable operator's web page to show them what information is available and to help them set up their email account.

Installing a cable modem and router in a closet or utility room is simplified by having what items in the room?

Easy access so that coaxial cable can be routed to the modem, an electrical outlet to power the cable modem and router and a twisted pair network cable that is tagged and has connectors installed using standard wiring configurations.

How does a DOCSIS modem receive its internet protocol (IP) address?

From a dynamic host configuration protocol(DHCP) server that provides the CMTS with the modem's IP address, which is forwarded to the modem during initialization.

From where do DOCSIS modems receive their configuration files, billing system messages, and access control messages?

From the CMTS acting as a "proxy" or messenger that transfers messages and files between the modems and the respective servers

How can delays caused by low upstream data throughput delay the delivery of data in the downstream?

If reception of the application's acknowledgement is delayed because of slow upstream data throughput, the downstream data is also delayed, regardless of the downstream data throughput.

Why is it a good idea to monitor the cable modem's status indicators during the modem initialization process?

If there is a failure during initialization, the status lights can indicate which step failed and identify appropriate action.

What is the upstream frequency bandwidth if four DOCSIS 3.0 carriers of maximum bandwidth are bonded?

In DOCSIS 3.0, if up to four 6.4 MHz wide upstream carriers are bonded, the upstream frequency bandwidth is 25.6 MHz.

In addition to being an equipment standard, what other recommendations are included in the Data Over Cable Service Interface Specification (DOCSIS)?

In addition to being an equipment standard, DOCSIS includes recommended parameters for HFC network performance. If the network meets or exceeds these recommendations, operators can expect reliable data transmission

What is a feature that was included in DOCSIS 3.0 other than channel bonding?

In addition to channel bonding, DOCSIS 3.0 was designed to support IPv4 and IPv6 and an orderly transition from IPv4 to IPv6.

What is a DOCSIS® cable modem looking for in a downstream carrier in order to synchronize to the CMTS?

In order to synchronize to the CMTS, the cable modem scans for a quadrature amplitude modulation (QAM) carrier that has QAM symbol timing, forward error correction (FEC) framing, MPEG packetization, and synchronized (SYNC) downstream media access control (MAC) messages.

What supplies the supervisory voltage to the customer's telephone in the PacketCable voice over Internet protocol (VoIP) system?

In the PacketCable VoIP system the EMTA provides the supervisory voltage and other signals to the customer's telephone.

Entertainment cabinets with doors made of green glass, block what?

Infrared (IR) remote sensors

Why should an already installed cable service drop be inspected as part of any installation and service call?

Installation standards change, so what might have been a good installation at the time could be out of compliance today. Therefore, the entire drop system must be checked to ensure safety, technical, and company compliance during every installation and service call.

What simplifies the installation if the customer wants the cable modem installed in a closet or utility room?

Installing the modem in a closet or utility room is relatively simple if there is an electrical outlet to power the router and cable modem, if a coaxial cable can be routed to the modem, and if the twisted-pair network cable is tagged and has its connectors installed using standard wiring configurations.

What is the difference between a cable modem and a wireless gateway?

Instead of connecting to only one computer device as the modem does, the gateway connects to several devices via wired-Ethernet connections or Wi-Fi.

If a customer already has cable television service and is adding high-speed data service. What should be checked on the digital television channels?

Intermittent operation, which is a symptom of noise or interference in the downstream

What are three measures of voice quality that can be delivered within specified parameters over the PacketCable managed IP network?

Latency, jitter, and dropped packets are important measures of voice service quality that can be delivered within specified parameters over the PacketCable managed network.

What layers of the OSI reference model are applied between DOCSIS modems and the CMTS?

Layers 1 through 4(Physical layer, Data link layer, network layer, and transport layer

Where should the customer be encouraged to go for information and questions before calling customer service?

Online to the cable operator's website in the FAQ page. The information and answers provided are current and usually the same as those provided to customer service representatives

What features were introduced with the 3.1 version of DOCSIS to increase the downstream and upstream data throughput?

Orthogonal frequency division multiplexing(OFDM) and low-density parity-check(LDPC)

What technology is used as the standard method for converting analog telephone calls into digital data?

PCM is the standard method used for converting analog telephone calls into digital data.

Upon what technology is plain old telephone service (POTS) based?

POTS is based on circuit switching technology.

What type of communications is used when two computers are used for Level III VoIP service over the Internet?

Peer-to-peer communications is used when two computers are connected for Tier III VoIP service over the Internet.

What are some of the standards that came out of building the digital public switched telephone network(PSTN)?

Pulse code modulation(PCM) digital signal (DS) hierarchy, and the T-carrier trunk hierarchy

What feature was introduced in DOCSIS 1.1 that enabled the setting of defined levels of service so that minimum throughput data rates could be guaranteed?

Quality of service (QoS) protocols introduced in DOCSIS 1.1 enabled the setting of defined levels of service so that minimum throughput data rates could be guaranteed.

What was added to the first DOCSIS that enabled broadband cable operators to provide telephone service with quality and reliability that rivaled the products of traditional telephone companies?

Quality of service(QOS) controls, enhanced security, and adaptive equalization in the upstream path

What mechanism was added to the Data Over Cable Service Interface Specification (DOCSIS) media access control (MAC) protocol to enable quality of service (QoS) management?

Service flow was added in DOCSIS 1.1 to provide a mechanism for upstream and downstream QoS management.

What could happen if system components are stacked on top of processor-intensive components such as a set-top box (STB)?

Stacking components on top of processor-intensive components such as an STB can restrict the air flow that dissipates heat, which can cause the STB to malfunction or fail.

What are some consequences of using standard user datagram protocol (UDP) for the transport of voice over Internet protocol (VoIP) telephone calls?

Standard UDP provides no packet management overhead so delay through the network is minimized, but there is no prioritization of packets or guarantee of packet delivery; obstacles to acceptance of early VoIP systems.

When helping a new customer set up email for the first time, what suggestion should you make regarding the customer's email login ID and password?

Suggest that they write their email login ID and password down and keep it in a safe place

The embedded multimedia terminal adapter (EMTA) is in which of the three networks described in the PacketCable architecture?

The EMTA is in the DOCSIS HFC access network.

The first version of DOCSIS was approved as an international standard by what organization?

The International Telecommunications Union (ITU)

What information is typically stored in a signal level meter's (SLM) channel plan?

The SLM channel plan typically includes the channel number, center frequency, channel bandwidth, modulation type, and symbol rate.

Why did the digital versatile disc (DVD) player/recorder replace the videocassette recorder (VCR) in many entertainment systems?

The VCR was replaced in many entertainment systems because of the DVD's compact size, excellent video and audio quality, and the player's ease of use.

What determines how many days TV program schedules can be stored on a digital set-top box?

The amount of available STB memory, the number of program channels and how often the carousel server delivers new information.

What security measures does DOCSIS utilize to prevent cloning of a modem's media access control (MAC) information?

The baseline privacy interface (BPI) was introduced in DOCSIS version 1.1 to prevent cloning of a modem's MAC information.

A cable gateway can replace which broadband cable operator supplied devices?

The cable gateway could replace a cable modem and digital set-top box

What device is being deployed as the next evolutionary step for the STB?

The cable gateway is being deployed as the next evolutionary step for the STB.

What differentiates a wide area network (WAN) from a metropolitan area network (MAN) or a local area network (LAN)?

The different IP networks are defined by the standards used, the equipment installed, and the geographic boundaries that define the locations of the equipment.

What obstacles prevented early acceptance of the Internet Phone from VocalTec Inc.?

The inability to offer a product comparable POTS prevented VocalTec's early acceptance; the calling and receiving computer had to be turned on and running VocalTec's software; degradation of service and dropped calls from switched packets.

When does the initialization process of a DOCSIS modem begin?

The initialization of the DOCSIS modem begins automatically when it is powered up and connected to the broadband cable network.

What are the main components of the DOCSIS architecture?

The main components of the DOCSIS architecture are the cable modem and the cable modem termination system (CMTS).

During DOCSIS modem registration, when does the modem become sanctioned for high-speed data (HSD) service at the authorized service levels?

The modem becomes sanctioned for HSD service at authorized service levels after a registration response message is sent to the modem and the modem is assigned a service identifier (SID).

What information is in a modem's configuration file?

The modem configuration file contains operational parameters such as network access speeds, quality of service (QoS), and other information detailing how the modem functions in the network.

what happens if a DOCSIS modem is unable to acquire the current time and date from one or more time-of-day(TOD) servers during registration with the CMTS?

The modem proceeds to an operational state and issues at least one TOD request per 5-minute period for each server specified until local time is established

What information does a DOCSIS 3.1 modem provide in it's Bonded Initial Ranging Request (B-INIT-RNG-REQ)message to the CMTS?

The modem's downstream service group (DS-SG) if determined.

What was a practical limitation of the integrated entertainment system cabinet?

The size of the picture tube was limited to what could be installed in the integrated entertainment system cabinet.

What are the three networks of the PacketCable 1.0 architecture?

The three networks of PacketCable 1.0 architecture are the DOCSIS HFC access network, the managed IP network, and the PSTN.

If the customer is an Internet novice, what would be the benefit of saving your company's website to their home page?

They might appreciate having easy access to a website that contains links to their email and other useful or interesting links.

What access technology does the first version of the DOCSIS 1.0 use to send data upstream over the network's RF return path?

Time division multiple access (TDMA)

What criteria must a cable modem meet to be certified as a DOCSIS modem?

To be certified as a DOCSIS modem, verification of compliance with DOCSIS standards and the ability to interoperate with other certified DOCSIS modems must be met.

What parameters of the RF carrier should be measured when diagnosing or qualifying a digital TV (DTV) service?

To diagnose or qualify a DTV service, measurements such as power levels, modulation error ratio (MER), bit error rate (BER), etc. should be taken using a digital signal analyzer.

Why would a cable operator consider activating device class identification(DCI) as part of a DOCSIS modem's initialization?

To enable the cable operator to define special modem classes or service levels that can be prioritized for ranging after a massive outage.

When choosing the installation location for a cable modem, what should you consider to ensure continuous and reliable operation?

To ensure continuous and reliable operation, the modem should have adequate air-flow across it and be plugged into a non-switched AC power outlet.

What is introduced in DOCSIS 3.1 to increase data throughput?

To increase data throughput, DOCSIS 3.1 uses orthogonal frequency division multiplexing (OFDM) and low-density parity-check (LDCP).

Why is it a good practice to review the service work order with the customer before beginning a high-speed(HSD) service installation?

To verify account information and to confirm the high-speed data service order

When connected directly to the broadband cable network, what must be done to the digital television set for it determine each channel's modulation and encoding scheme?

When connected directly to the broadband cable network, the DTV must be instructed to "scan" all of the incoming channels and store each channel's modulation and encoding scheme into memory.

When scanning an OFDM channel, what does the DOCSIS 3.1 modem seek in order to acquire and maintain synchronization with the CMTS on that downstream OFDM channel?

When scanning an OFDM channel, the DOCSIS 3.1 modem is seeking an OFDM subcarrier to enable the modem to acquire and maintain synchronization with the CMTS on that downstream OFDM channel.

When would a DTA be installed in the customer premises?

When the customer subscribes to basic-only services

Which layers of the seven-layer Open Systems Interconnection (OSI) reference model are present in the DOCSIS implementation?

Within the DOCSIS implementation of the OSI model, layers one through four are specific to cable networks and are present only between the cable modem and the CMTS.