Data Sheet DXC Module D8U 8-Port ISDN "U" Interface Module • Full interoperability with Megaplex-2100/2104 HS-U family modules • Per port 2B + D channel transmission at ranges of up to 5.5 km (3.4 miles) • ITU-T Rec. G.961 compliant • ISDN line extension or dedicated line termination units for leased lines D8U is an 8-port ISDN “U” interface D8U is fully interoperable with module for use with the modular DXC Megaplex-2100/2104 HS-U family Digital Cross-Connect units. modules. D8U provides ISDN “U” ports, each Each B channel or “U” interface can be supporting 2B + D channels, for a total programmed independently to operate at payload data rate of up to 128 kbps per the following data rates (depending on port. the application): 2B1Q line coding is used for full-duplex • “I” mode: 64 kbps data transmission over 2-wire • “1” mode: 64 or 128 kbps. unconditioned lines at ranges of up to D8U provides 96 VDC phantom feeding to 5.5 km (3.4 miles) over 26 AWG line. remote equipment. Received from an D8U can be configured to work in the external power source, the phantom following applications: feeding can be enabled or disabled for • Extension of ISDN lines over non-ISDN each module port. facilities (“I” mode). In this application Diagnostic functions include loopbacks on D8U can be configured as either line external ports and individual channels. termination (LT) or network 8-port ISDN “U” Additionally, when operating in “1” mode, termination (NT) unit, connecting up the modules can activate remote loopback to two remote locations. module for the DXC and BERT on the ASMi-31 modems via the • Line termination (“1” mode) over module ports. family of modular leased lines, with D channels disabled. Setup, control, and diagnostics are In this application D8U serves as performed via a DXC system supervisory cross-connects dedicated line termination unit for the port using an ASCII terminal, Telnet, or by ASMi-31 short-range modems, the RADview element management connecting up to 8 remote locations. system. The Access Company D8U 8-Port ISDN "U" Interface Module Figure 1. Extending ISDN Lines over Non-ISDN Facilities (“I” Mode) Figure 2. ISDL Application (“1” Mode) Data Sheet Typical Range Diagnostics (per port) Specifications 5.5 km (3.4 miles) over 26 AWG (0.4 mm) Local loopback Number of Ports pair Remote loopback 8 “U” ports Local loopbacks on the individual channels Connector of a port Compliance 25-pin D-type female connector per group Local loopback on module port in ITU-T Rec. G.961 ANSI T1.601 of eight ports response to RLB command Nominal Data Rate Phantom Feeding Remote loopback on remote ASM-31 or 160 kbps (ISDN basic rate access, 96 VDC provided by an external source ASMi-31, towards the module port 2B + D channels) connected to the module connector, can Activation of BER testing from remote be individually enabled/disabled for each ASM-31 or ASMi-31 towards the Line Signal Format module port module port 2B1Q Port Timing Indicators (per port) Transmission Format LT Mode: Transmit timing is locked to the SYNC LOSS (red) – Full-duplex DXC nodal timing On: line synchronization lost Line Type NT Mode: Receive timing is recovered from TEST (yellow) – 2-wire unconditioned telephone loops line signal On: test running on line (one twisted pair) Power Consumption Configuration Nominal Line Impedance 6W at 1.2A maximum Programmable by the DXC system 135Ω management or RADview Management Port Payload Rate System Transmit Level “I” configuration: Downloading configuration of ASMi-31 +13 dBm 64 kbps on each B channel from “1” port to the remote modem 16 kbps on each D channel Maximum Loop Loss “1” configuration: Physical 42 dB at 40 kHz, max resistance 1300Ω 64 or 128 kbps Occupies a single slot in a DXC-8R, DXC-10A or DXC-30 chassis For comparison of DXC chassis, see Table 2. For the list of DXC I/O modules, refer to the DXC-8R/10A/30 folder. 772-135-09/08 Specifications are subject to change without prior notice. 1988–2008 RAD Data Communications Ltd. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven, and the product names © Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders. Data Sheet D8U 8-Port ISDN "U" Interface Module OPTIONAL ACCESSORIES Ordering CBL-D8U-RJ45/X DXC-M-8U Adapter cable for D8U, splits a single DB-25 connector into 8 x RJ-45 balanced connectors Table 2. DXC Chassis Comparison Table Feature DXC-8R DXC-10A DXC-30 DXC-100* Height 1U 1U 3U 6U per nest Maximum number of ports 32 40 120 688 (8 nests) Number of I/O slots 4 5 15 86 (8 nests) System redundancy Built-in None Optional Optional E1, T1, E3, T3, STM-1 modules 9 9 9 9 XDSL, inverse multiplexing modules 9 9 9 – n x 56/64 kbps modules 9 9 9 9 Router, OC-3 modules – – – 9 ASCII, SNMP, RADview management 9 9 9 9 *The DXC-8R/10A/30 modules and DXC-100 modules are not interchangeable. International Headquarters North America Headquarters 24 Raoul Wallenberg Street 900 Corporate Drive Tel Aviv 69719, Israel Mahwah, NJ 07430, USA Tel. 972-3-6458181 Tel. 201-5291100 Fax 972-3-6498250, 6474436 Toll free 1-800-4447234 E-mail market@rad.com Fax 201-5295777 E-mail market@radusa.com The Access Company www.rad. com