Data Sheet DXC Module DE1B E1 Link Module • Two-port E1 interface module • Available with copper or fiber optic line interface • Range up to 100 km (62 mi) with fiber optic interface • High-speed data rate of up to 2.048 Mbps • Complies with ITU-T Rec. G.703, G.704, G.732, G.823, and G.956 standards DE1B is a two-port E1 link module for use The following fiber optic, laser link options with RAD’s modular Digital Cross-Connect are available: units DXC-8R, DXC-10A, DXC-30, and • 850 nm multimode DXC-30E. Each module provides two E1 • 1310 nm single mode links over copper or fiber optic interfaces that support both E1 and fractional E1 • 1550 nm single mode, providing the rates. maximum range of 100 km (62 mi). DE1B can be ordered with either a DE1B supports 2 or 16 frames per balanced copper or a fiber optic interface. multiframe (256N or 256S), user-selectable TS0 multiframe with CRC-4 option, and 2 Mbps unframed mode per ITU-T Rec. G.703. 2-port copper or fiber E1 link module for the DXC family of modular cross-connects Innovative Access Solutions DE1B E1 Link Module Modules with copper links have two For longer range applications, copper link Setup, control, and diagnostics can be jumper-selectable line interfaces available: modules are available with an LTU option performed via a supervisory port using an that extends the receive level to –40 dB. ASCII terminal or by the RADview SNMP • 120Ω balanced interface terminated element management system. Remote by an RJ-45 connector The optional port bypass feature ensures units can be controlled using a dedicated continuous traffic support in case of • 75Ω unbalanced interface terminated management timeslot in the E1 path. power failure, by bypassing port 1 to by two BNC female connectors. port 2. Diagnostic capabilities include DE1B modules support two types of self-diagnostics on power-up, local and Two user-programmable timeslot routing redundancy: remote loopbacks on each port, BER test modes are available for the module ports: • Single-slot/line redundancy (1:1) on the active timeslots, and the inband • Bidirectional with symmetrical routing ensures protective switching between code-activated loopback, specified in ANSI ports on the same module within less • Unidirectional with independent T1.403. than 50 ms. control over routing in each direction. • Y-cable redundancy switches between different modules to protect the service from hardware failure. This type of redundancy is supported by the copper interface only. Table 1. Fiber Optic Interface Characteristics Laser Transmitter Fiber Type Typical Output Receiver Sensitivity Typical Optical Typical Maximum Wavelength Power Budget Range [nm] [μm] [dBm] [dBm] [dB] [km] [mi] 850 62.5/125 multimode –17 –38 18 5 3 1310 9/125 single mode –12 –34 25 55 34 1550 9/125 single mode –12 –34 25 100 62 Figure 1. Service Aggregation on E1 and Fractional E1 Links Data Sheet Jitter Performance Signal Level Specifications Per ITU-T Rec. G.823, meets Receive: Number of Ports ETSI TBR 12/13 0 to –40 dB with LTU Two per module 0 to –10 dB without LTU Diagnostics Data Rate Transmit: Local and remote loopbacks on each 2.048 Mbps ±3V (±10%), balanced module port ±2.37V (±10%), unbalanced BER testing Compliance Inband code activated loopback ITU-T Rec. G.703, G.704, G.732, G.823 FIBER OPTIC LASER INTERFACE Indicators Framing Operating Characteristics L LOS (red) – Local port frame 256N – no MF, CCS See Table 1 synchronization loss 256N – no MF, CCS with CRC-4 R LOS (red) – Remote port frame 256S – TS16 MF, CAS Connectors synchronization loss 256S – TS16 MF, CAS with CRC-4 ST, FC/PC, or SC (see Ordering) Unframed Power Consumption GENERAL 3W at 0.6A COPPER INTERFACE Timeslot Allocation Configuration Line Code User-defined, any timeslot to any timeslot Programmable via DXC management HDB3 mapping Physical Impedance Timing 3U occupies one DXC-8R/10A/30 module 120Ω, balanced Receive: derived from a selected data slot 75Ω, unbalanced port, can be used as external source for 6U occupies one DXC-30E module slot Connectors (per port) DXC master timing RJ-45, for balanced Transmit: locked to master DXC timing Two BNC coaxial, for unbalanced source Table 2. DXC Family Comparison Table Features DXC-8R DXC-10A DXC-30/30E DXC-100 Height 1U 1U 3U/6U 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 * Maximum possible ports are 240 with the ISDN option only. 772-121-03/07 Specifications are subject to change without prior notice. © 1988–2007 RAD Data Communications Ltd. All other trademarks are the property of their respective holders. Data Sheet DE1B E1 Link Module OPTIONAL ACCESSORIES Legend Ordering $ Link interface type: CBL-RJ45-Y/CROSS DXC-M-E1B/$/#/+ C built-in LTU (copper interface Cross-cable for providing Y-cable Two-port E1 Link Module, 3U-high only) redundancy. Includes four RJ-45 DXC-ME-E1B/$/#/+ BP port bypass connectors, two on each side. Two-port E1 Link Module, 6U-high BP/C built-in LTU and optional port bypass (copper interface only) # Link connector type (default is copper interface with coaxial BNC connectors): ST ST connectors FC FC/PC connectors SC SC connectors + Laser optical interface wavelength and transmitter type (not relevant with copper interface): 85L 850 nm, multimode 13L 1310 nm, single mode 15L 1550 nm, single mode 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 Innovative Access Solutions www.rad. com