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JDSU SmartClass™ ADSL
JDSU CSC-DSL Series Shown
|The JDSU SmartClass ADSL is the ideal tool
for the technician installing and maintaining asymmetrical digital
subscriber line (ADSL) services. The tester enables the technician to
test loop quality, verify ADSL signal and performance, and validate the
customer’s Internet connection with unprecedented ease and speed.
Smart Class ADSL provides a full set of copper tests that qualifies the customer loop for the delivery of newer services such as Internet protocol television (IPTV) including longitudinal balance, a key copper metric to ensure external noise and interference will not impact the quality of the IPTV streams with intermittent pixelization and other disruptive effects. Digital volt-ohmmeter (DVOM), distance-to-short, leakage, opens/capacitance, and load coil counter tests guarantee the copper loop does not exhibit connection issues and that the quality of the copper pair is within allowed standards for ADSL2+ transmission in terms of loop length and isolation. The unique Cable Check sequence provides a very easy and fast method to qualify the copper loop for ADSL2+ services with a pass/fail indication and programmable thresholds. The full-featured ADSL tests quickly verify provisioned rates and quality, including up/down actual and max rates, margin, attenuation, capacity, TX power, errors, alarms, a synchronous transfer mode (ATM) optical amplifier module (OAM) and stats, Ethernet stats, and bipolar transistor (BPT) graphs.
In addition, the Smart Class ADSL supports the storage and retrieval of preset configurations and allows technicians to transfer results to a person computer using a universal serial bus (USB) connection. The instrument’s features, including its rugged design and field-replaceable AA batteries, make it the essential ADSL installation tool.
ADSL2+ has emerged a san IPTV-enabling technology of choice for network
operators and services providers seeking new revenue streams and
competitive positioning. At the same time consumers are signing up for
multiple services in this very competitive environment expecting the
best service quality, making it imperative that operators quickly and
cost-effectively install ADSL2+ lines with the confidence that their
complex triple-play services are working well.
Delivery of ADSL services requires a single copper pair configuration of a standard voice circuit with an ADSL modem at e ch end of the line, creating three information channels—a high-speed down stream channel, a medium-speed up stream channel, and a plain old telephone service (POTS) channel for voice. Data rates depend on several factors including the length of the copper wire, the wire gauge, presence of bridged taps, and cross-coupled interference. The line performance increases as the line length is reduced, wire gauge increases, bridged taps are eliminated and cross-coupled interference is reduced or is canceled out by a good longitudinal balance characteristic of the copper wire. The modem located at the subscriber’s premises is called an ADSL transceiver unit-remote (ATU-R), and the modem at the central office is called an ADSL transceiver unit-central office (ATU-C). The ATU-C stake the form of circuit cards mounted in the digital subscriber line access multiplexer (DSLAM), while a residential or business subscriber connects their PC and ATU-R modem to a telephone outlet on the wall.
ADSL2 has been specifically designed to improve the rate and reach of ADSL largely by achieving better performance on long lines. ADSL2 accomplishes this by improving modulation efficiency, reducing framing overhead, achieving higher coding gain, improving the initialization state machine, and providing enhanced signal processing algorithms. ADSL2+ further improves on the ADSL2 standard by allocating additional spectrum for downstream data, dramatically improving the data rate over ADSL2 or ADSL.
|With its improved downstream rates, ADSL2+ is the preferred technology to deliver IPTV. IPTV requires the installation of a set-top box (STB) to decode the compressed video stream for both broadcast and video-on-demand (VoD) services. But transmitting IPTV streams through the network is far more challenging than other broadband services. Broadband applications other than IPTV (such as web browsing and file sharing) mainly use IP/TCP (Internet protocol/transmission control protocol) with acknowledgment that sent packets have been received and are transmission, incase of lost packets. Unlike IP data services, IPTV is a highly compressed, real-time application, and lost video packets caused by intermittent problems with the transport or video stream can directly be visible to the user in the form of pixelization, blurring, and frame freezes. In addition, poor transaction quality (to receive program channels) and poor overall content quality may also occur, further impacting the customer experience.|
The SmartClass ADSL can be used to verify service delivery at the provisioned bitrates and quality levels through a quick sync check at various points along the customer circuit (ATU-R, network interface device [NID], splice case, cross box, main distribution frame [MDF], DSLAM). If the tester cannot synchronize with the DSLAM, the SmartClass ADSL provides the copper tests needed to check the wire pair for service affecting faults, or in the worst case helps find a new serviceable pair. In addition to DVOM, the included capacitance (opens, longitudinal balance, and load coil counter tests help identify unique ADSL problems in the convenient Cable Check test sequence. If the delivered service is slower than expected, the Smart Class ADSL provides resistance and opens tests to verify the presence of service-affecting bridged taps or the balance test to assess noise immunity.
Separately, a poorly balanced copper wire will pickup noise that contributes to video packet loss (continuity errors). The copper wire can be checked using the SmartClass ADSL load coil counter to count the number of service-choking load coils on the line, as well as monitor for very high noise levels. The bits-per-tone and SNR-per-tone graphs are handy to correlated ips in performance with specific frequencies and crosstalk.
SmartClass ADSL also enables technicians to verify end-to-end IP connectivity with IPPING and trace route. Other tests include the FTP through put test, to ensure the network supports the requested bandwidth, and the HTTP Web test, that identifies problems related to dedicated websites.
|CSCDSLGLDP3||JDSU CSC-DSLGLD-P3 SmartClass ADSL Gold ADSL2+ Annex A & Cu package||Discontinued|
|CSCDSLSILP2||JDSU CSC-DSLSIL-P2 SmartClass ADSL Silver ADSL2+ Annex A package||Discontinued|
|CSCDSLSILP2B||JDSU CSC-DSLSIL-P2B SmartClass ADSL Silver ADSL2+ Annex B package||Discontinued|
|SCTP-IPVIDEO||JDSU SCTP-IPVIDEO SmartClass TPS IP Video Software Option||Sale $894.49