Data Sheet DXC Module DT1B T1 Link Module • Two-port T1 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 1.544 Mbps • Complies with AT&T TR-62411, ANSI T1.403, ITU-T Rec.G.703, G.704, G.921, and G.956 standards DT1B is a two-port T1 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 T1 • 1310 nm single mode links over copper or fiber optic interfaces that support both T1 and fractional T1 • 1550 nm single mode, providing the rates. maximum range of 100 km (62 mi). DT1B can be ordered with either a DT1B supports D4 (SF) or ESF framing balanced copper or a fiber optic interface. and 1.544 Mbps unframed mode per ITU-T Rec. G.703. 2-port copper or fiber T1 link module for the DXC family of modular cross-connects Innovative Access Solutions DT1B T1 Link Module DT1B modules support two types of For longer-range applications, copper link Setup, control, and diagnostics can be redundancy: modules are available with an CSU option performed via a supervisory port using an for increasing the line attenuation up to ASCII terminal or by the RADview SNMP • Single-slot/line redundancy (1:1) –36 dB. element management system. Remote ensures protective switching between units can be controlled using a dedicated ports on the same module within less The optional port bypass feature ensures management timeslot in the T1 path. than 50 ms continuous traffic support in case of power failure, by bypassing port 1 to Diagnostic capabilities include • Y-cable redundancy switches between port 2. self-diagnostics on power-up, analog and different modules to protect the remote loopbacks, BER test on the active service from hardware failure. This Two user-programmable timeslot routing timeslots, and the inband code-activated type of redundancy is supported by modes are available for the module ports: loopback, specified in ANSI T1.403. the copper interface only. • Bidirectional with symmetrical routing • Unidirectional with independent control over routing in each direction. Table 1. Fiber Optic Interface Characteristics Laser Transmitter Fiber Type Typical Output Receiver Sensitivity Typical Optical Typical Maximum Wavelength Power Budget Distance [nm] [μm] [dBm] [dBm] [dB] [km] [mi] 850 62.5/125 multimode –18 –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. Aggregating Services on T1 and Fractional T1 Links Data Sheet Jitter Performance Connectors (per port) Specifications Per AT&T TR-62411 and ETSI TBR 12/13 RJ-45, 8-pin, balanced Number of Ports Diagnostics Two per module FIBER OPTIC LASER INTERFACE Local and remote loopbacks on each Data Rate module port Operating Characteristics 1.544 Mbps Network line loopback (LLB) See Table 1 Payload loopback (PLB) Compliance Dynamic Range BER testing AT&T TR-62411, ANSI T1.403, 28 dB for all types of optical interfaces ITU-T Rec. G.703, G.704 Indicators Connectors L LOS (red) – Local port frame Framing ST, FC/PC, or SC (see Ordering) synchronization loss D4 (SF), ESF, unframed R LOS (red) – Remote port frame GENERAL COPPER INTERFACE synchronization loss Timeslot Allocation Line Code Power Consumption User-defined, any timeslot to any timeslot AMI 3W at 0.6A mapping Impedance Configuration Timing 100Ω, balanced Programmable via DXC management Receive: derived from a selected data Signal Level Physical port, can be used as external source Receive: 3U-high occupies one DXC-8R/10A/30 for DXC master timing 0 to –36 dB with CSU module slot Transmit: locked to master DXC timing 0 to –10 dB without CSU 6U-high occupies one DXC-30E module source Transmit: slot ±3V (±10%), balanced Levels with CSU: 0 dB, -7.5 dB, -15 dB, -22.5 dB Levels without CSU: Adjustable to be measured at 0 to 655 ft 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 T1, 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. 772-122-03/07 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 DT1B T1 Link Module OPTIONAL ACCESSORIES Ordering CBL-MP-RJ45/STR DXC-M-T1B/$/#/+ Straight cable for balanced T1 connection Two-port T1 link module, 3U-high CBL-MP-RJ45/CROSS DXC-ME-T1B/$/#/+ Cross-cable for balanced T1 connection Two-port T1 link module, 6U-high CBL-RJ45-Y/CROSS Legend Cross-cable for providing Y-cable $ CSU option: redundancy. Includes four RJ-45 C built-in CSU (copper interface connectors, two on each side. only) BP port bypass BP/C built-in CSU 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