DXC Modules DT1, DT1B T1 Link Modules • Two user-programmable timeslot DESCRIPTION routing modes are available for the module ports: • DT1 and DT1B are two-port T1 � Bidirectional with symmetrical link modules for use with the routing modular Digital Cross-Connect � Unidirectional with independent units (DXC-8R, DXC-10A, DXC-30, control over routing in each DXC-30E and DXC-STM-1). Each direction. module provides two T1 links over either copper or fiber optic • Setup, control and diagnostics can interface. The links support both be performed via a supervisory T1 and fractional T1 rates. port using an ASCII terminal or by • The DT1, DT1B modules can be the RADview SNMP network ordered with either balanced management system. Control of copper or fiber optic interface. remote units can be implemented by a dedicated management • A number of fiber optic link timeslot in the T1 path. options are available, including: � 850 nm multimode • DT1 diagnostic capabilities include self-diagnostics upon � 1310 nm single mode power-up, analog, remote, � 1310 nm single mode with laser network line and payload FEATURES � 1550 nm single mode with laser, loopbacks controlled by DXC. providing the maximum range of DT1B also features BER test on • Two-port T1 interface 55 miles. the active timeslots and inband modules for the DXC family • DT1 and DT1B support D4(SF) or code-activated loopback, ESF framing. Additionally, DT1B specified in ANSI T1E1.2/93-003. • Range up to 62 miles with supports 1.544 Mbps unframed fiber-optic interface mode per ITU-T Rec. G.703. • High speed data rate up to SPECIFICATIONS • For longer range applications, 1.544 Mbps copper link modules feature an • Number of Ports • Available with copper or integral CSU option. When used, Two per module fiber-optic interface it increases the line attenuation up • Data Rate • HDSL interface also to -36 dB. 1.544 Mbps available (see the DHL/T1 • DT1B modules support two types • Compliance data sheet) of redundancy: AT&T TR-62411, ANSI T1.403 • Complies with � Single-slot/line redundancy (1:1) ITU-T Rec.G.703, G.704 AT&T TR-62411, ANSI T1.403, ensures protective switching • Framing ITU-T Rec.G.703, G.704, within less than 50 ms, between D4(SF), ESF, Unframed G.921 and G.956 standards ports on the same module. COPPER INTERFACE � • DT1B module supports BER Y-cable redundancy between modules protects the service • Line Code test on selectable timeslots from hardware failure. This type AMI • Optional bypass between of redundancy is supported by • Impedance links on the DT1B module the copper interface only. 100Ω, balanced • Fits into any DXC chassis: • Optional port bypass feature • Connectors (per port) DXC-8R, DXC-10A, ensures continuous traffic support RJ-45, 8-pin, for balanced DXC-30, DXC-STM-1; a in case of power failure by special 6U-high version fits bypassing port 1 to port 2. into the DXC-30E chassis DXC Modules DT1, DT1B T1 Link Modules • Signal Level • Timing ORDERING Receive: Receive: 3U-high module versions: 0 to -36 dB with CSU Derived from a selected data 0 to -10 dB without CSU port, can be used as external DXC-M/T1/$ Transmit: source for DXC master timing Two-port T1 Link Module Nominal level Transmit: ±3V (±10%), balanced DXC-M/T1B/$/#+ Locked to master DXC timing Two-port T1 Link Module with BERT Levels with CSU source 0 dB, -7.5 dB, -15 dB, and loopback per timeslot • Jitter Performance -22.5 dB To order a 6U-high module version Per AT&T TR-62411 Levels without CSU for DXC-30E chassis, add E after the Meets ETSI TBR 12/13 Adjustable to be measured at DXC-M prefix of the corresponding • Diagnostics 0 to 655 ft option, for example: � Local and remote loopbacks on DXC-ME/T1/$/#+ FIBER OPTIC INTERFACE each module port � To order HDSL interfaces, refer to Network line loopback (LLB) • Operating Wavelength � Payload loopback (PLB) the DHL/T1 data sheet 850, 1310 or 1550 nm � BER testing (DT1B only) (see Ordering) $ Specify built-in CSU option • Indicators C for CSU option (copper • Connectors L LOS Local Port Frame interface only) ST, FC/PC or SC (see Ordering) Synchronization Loss BP for port bypass (DT1B only) • Dynamic Range R LOS Remote Port Frame BP/C for built-in CSU and 28 dB for all types of optical Synchronization Loss optional port bypass (DT1B and interfaces copper interface only) • Power Consumption 3W at 0.6A GENERAL #+ # Specify link connectors type: • Configuration ST for ST type connectors • Timeslot Allocation Programmable via DXC FC for FC/PC type connectors User-defined, any timeslot to any management SC for SC type connectors timeslot mapping Default is copper interface with • Physical coaxial BNC connectors Occupies one DXC-8R/10A/30/30E module slot + Specify optical interface wavelength and transmitter type (not relevant with copper interface): Table 1. Power and Transmission Distances 85 for 850 nm, multimode, LED Transmitter Fiber Output Receiver Maximum 13 for 1310 nm, single mode, LED Type Type Power Sensitivity Distance 13L for 1310 nm, single mode, laser 15L for 1550 nm, single mode, laser 850 nm LED 62.5/125 -18 dBm -38 dBm 5 km (3 mi) 1310 nm LED 9/125 -18 dBm -40 dBm 45 km (29 mi) 1310 nm laser 9/125 -12 dBm -34 dBm 55 km (34 mi) 1550 nm laser 9/125 -12 dBm -34 dBm 88 km (55 mi) APPLICATION FT1 T1 PABX FCD-T1 Router T1 SONET Backbone nxT1 VF-3/E&M DXC with DT1 Modules T1 HS-2 772-122-02/02 Server MP-2104  1993–2002 RAD Data Communications Ltd. Specifications are subject to change without prior notice. All other trademarks are the property of their respective holders.