® Tollgrade is everywhere MCU Test Extension your broadband network needs TM for Digital By-pass to be. Tollgrade’s patented copper facilities in the MCU channel units local exchange plant. for digital by-pass pair A digital by-pass pair circuits extend the reach also has a much greater of embedded, switch- Central Office (CO) to based test systems to Remote Terminal (RT) widely deployed Digital operating range than a Loop Carrier (DLC) metallic pair. systems via an emulated At the same time, “metallic channel.” customers can be served This emulated metallic by the DLC systems Extend the reach by-pass pair solution to receive the full benefit is compatible with most of higher bandwidth of switch-based common centralized services available on test access loop test systems the shorter loops with through fiber loops such as Tollgrade’s the confidence of TM LoopCare and Nortel’s switch-based access to via a simulated TM AccessCare. centralized test heads. “metallic channel.” Channel banks provi- sioned with MCU digital by-pass pair channel units provide centralized loop test system functionality and eliminate the need for metallic by-pass pairs or remote measuring units for testing subscriber lines served by DLC systems. This provides a cost-effective means to transition metallic pairs to fiber- based DLC systems, complementing pro- grams to either retire or better utilize existing Primary Features of the MCU Test Extension Solution Extended Simple to Use Depending on the DLC Test Capability The MCU digital by-pass system, the MCU chan- MCU digital by-pass pair pair channel units allow nel unit may be installed technology permits cen- for immediate test in any available slot. tralized loop test systems capability via telephone Compatibility ® (like Tollgrade’s DigiTest number, as no special An MCU digital by-pass Measurement Nodes) database changes are pair channel unit is to perform a full range of required. An MCU chan- available for the most tests with the speed and nel unit contains a num- commonly deployed accuracy of a high quality ber of user-selectable DLC and D4-compatible metallic by-pass pair, options, depending channel banks, providing while not subject to on the requirements for a uniform testing inductive interference, of the DLC system in solution across sub- ground potential prob- which it is installed. scriber loop deployments. lems or other environ- Only three leads at the Furthermore, every MCU mental conditions. In CO and two leads at the channel unit is end-to- addition, a DLC channel RT are required to be end compatible with provisioned with MCU cross-connected. An all other licensed or digital by-pass pair chan- MCU digital by-pass pair manufactured MCU nel units emulates a channel unit occupies a channel units designed 1350 ohm copper pair, single physical slot in the for the digital by-pass pair regardless of the length CO terminal and RT. application. of the DLC system. The following architectures depict typical configurations illustrating how MCU channel units may be deployed to create a digital by-pass pair. Typical Universal DLC Configuration PGTC RT COT NTT CTU DIGITEST MEASUREMENT NODES CLASS 5 MCU MCU CHANNEL CHANNEL UNIT UNIT CENTRAL OFFICE In Universal DLC applications, MCU channel units are inserted in both the COT and RT to provide a digital by-pass pair to emulate the metallic by-pass pair. Typical Integrated DLC Hair-Pin Configuration CLASS 5 NTT RT DIGITEST MEASUREMENT NODES T1 MCU CHANNEL MCU-EQUIPPED UNIT MICRO-BANK CENTRAL OFFICE In Integrated DLC applications, hair-pin arrangements use switch-based devices, such as an IDCU in a 5ESS or an MTA in a DMS-100, to route two consecutive DS0 time slots to a ® D4-compatible channel bank (e.g., Tollgrade Micro-Bank equipped with an MCU channel unit. Network Key This channel unit, along with an RT-based MCU channel unit, provides the digital by-pass pair. FIBER COPPER LOOPCARE COMMUNICATIONS Typical Integrated DLC DCS Device Configuration INTERFACE CLASS 5 DCS NTT RT DIGITEST MEASUREMENT NODES T1 TWO CONSECUTIVE TIME SLOTS MAPPED MCU MCU CHANNEL CHANNEL D4-COMPATIBLE UNIT UNIT CHANNEL BANK CENTRAL OFFICE Tollgrade Add/Drop In integrated applications, a DCS can be used to map two Micro-Bank Configuration consecutive time slots between a D4-compatible channel CLASS 5 bank and a DLC RT (both equipped with MCU channel units), TWO CONSECUTIVE NTT TIME SLOTS MAPPED to provide the digital by-pass pair. RT Alternatively, a Tollgrade Add/Drop Micro-Bank can be used to house the CO-based MCU channel unit and MCU-EQUIPPED provide the mapping of the two time slots. ADD/DROP MICRO-BANK MCU CHANNEL UNIT Specications Specications of MCU channel units may vary slightly based on the DLC system in which they are deployed. Please refer to individual product documentation for exact specications. Operating Range in the DC to 200Hz band DC Resistance (T to T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675 ohms DC Resistance (R to R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675 ohms Signaling Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +140/–140 V DC Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 to 120mA Power Requirements System-dependent Voiceband Parameters Insertion Loss at 1004 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5+/–1.0db Frequency Response vs. 1 Khz (504 to3204 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . +/–1.5db Impedance/2-wire Drop (terminated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 ohms +2uF Corporate Headquarters Idle Circuit Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <25dBrnC 3120 Unionville Road Other Building 110, Suite 400 Status LED(s) are provided for SYNC and BUSY indications. Cranberry Township, PA 16066 Automatic calibration three minutes after insertion and at subsequent 30-minute intervals. Phone: 724-720-1400 NEBS Level 3 Certied, meeting applicable requirements Fax: 724-720-1530 of GR-1089-CORE and GR-0063-CORE. 1-800-878-3399 www.tollgrade.com Ordering Information Product (System Compatibility) Part Number CLEI/HECI M CU-5405, List 4 TLGD-5405-L4 5SC26T02AE ® (Lucent SLC Series 5, ® SLC-2000 and AnyMedia ) MCU-4496ER, List 5 TLGD-4496ER-L5 S9CS678BAE (Lucent SLC 96 and ® D4 -Compatible Channel Banks) MCU-A405 (Adtran TA 1500) TLGD-A405 VAI1SK0CAB M CU-D405, List 2 TLGD-D405-L2 SLCIDED2AB ® (Alcatel Litespan 2000/2012) MCU-F405, List 3 (Fujitsu FDLC) TLGD-F405-L3 5SC3FG03AC MCU-N405, List 2 (Zhone ISC-303) TLGD-N405-L2 5SC26508AB MCU-R405, Issue 2, List 2 TLGD-SCU26A-I2-L2 SLCIDEG2AB ® (Tellabs DISC*S ) AFC now Tellabs DBP Card Contact Tellabs at 707-794-7700 TM (AccessMAX ) Calix ADP Card (C7) (GA Q106) Contact Calix at 877-766-3500 Motorola DBP Card (Wireline FTTN USAM and BDT) Contact Motorola at 707-584-6820 Zhone MAC/ITBP Card Contact Zhone at 877-946-6320 TM (AccessNode UE9000) Zhone ITU/ITBP Card Contact Zhone at 877-946-6320 (AccessNode Express) ® Tollgrade, MCU, DigiTest and Micro-Bank are registered trademarks of Tollgrade Communications, Inc. TM “Network Assurance Simplied, ” “Tollgrade is everywhere your broadband network needs to be” and LoopCare are trademarks of Tollgrade Communications, Inc. All other trademarks are the property of their respective owners. © 2011 Tollgrade Communications, Inc. All rights reserved. Specications are subject to change without notice.