Data Sheet DXC Module DFSTM-1 STM-1 Multiplexer Module • Daisy-chain configuration of multiple DXCs • E1/T1 conversion • Grooming of T1/FT1, E1/FE1, IDSL/ISDN, SHDSL, n × 56/64 kbps data, and inverse multiplexing traffic • Traffic capacity of up to 61.44 Mbps DFSTM-1 is an STM-1 multiplexer module When operating as a fractional SDH with a capacity of 61.44 Mbps (30 E1 data Terminal Multiplexer (TM) in a DXC chassis, streams) for the DXC-8R, DXC-10A and DFSTM-1 can multiplex traffic from up to DXC-30 Multiservice Access Nodes. 30 E1 data streams into a single STM-1 data stream. The module routes any E1 DFSTM-1 modules are available with two data stream to any of the 63 TU-12 port configurations: tributary units carried in the STM-1 VC-4 • Single-port module virtual container. • Dual-port module for redundancy or As a TM, DFSTM-1 grooms and multiplexes daisy chain applications. T1/FT1, E1/FE1, IDSL/ISDN, SHDSL, The secondary port can be ordered with n × 56/64 kbps data, as well as n × E1/T1 the same interface as the primary port, or data (where n = 1 to 8) in conjunction a different one, either in media (copper or with the DIM inverse multiplexer module (see fiber) or interface type. Figure 1). The DFSTM-1 module provides direct DFSTM-1 can distribute up to access to the STM-n SDH ADMs, at the 960 timeslots from up to 30 VC-12 STM-1 level (155.520 Mbps). It operates containers of the full STM-1 link and opposite another DXC or any other distribute them among the various other standard STM-1 equipment. installed modules. These can include any STM-1 multiplexer E1, T1, ISDN/IDSL, SHDSL n × 56/64 kbps data, or a DXC inverse for the DXC family multiplexer module. of modular cross-connects The Access Company DFSTM-1 STM-1 Multiplexer Module When multiple units are connected in a • Optical interface, enabling remote Setup, control, and diagnostics can be drop-and-insert configuration, a full STM-1 access to regional and national SDH performed using an ASCII terminal stream (63 × E1) can be distributed transmission networks. connected to the supervisory port, or with among an unlimited number of chassis the RADview SNMP element management The following fiber-optic STM-1 interface (see Figure 2). system. options are available: A DXC with the DFSTM-1 module can be Diagnostic capabilities include • 1310 nm single mode with laser also used as an E1/T1 converter (see self-diagnostics upon power-up, local and transmitter Figure 3). remote loopbacks, and performance • 1550 nm single mode with laser monitoring of external and internal ports. To support DFSTM-1 modules, the DXC transmitter. chassis must include the Common Logic DFSTM-1 modules operating in a DXC-30 The DFSTM-1 module with two STM-1 module DCL.3, running software version chassis require an external cooling unit. A ports can be configured for physical layer 7.00 or higher. fan tray is available for this purpose (see (line) redundancy. If the active STM-1 port Ordering). The DXC-8R and DXC-10A The STM-1 port can be ordered with one or its link fails, the traffic is automatically chassis do not require additional cooling. of the following interface types: switched (within less than 50 msec) to the • Electrical intra-office copper other STM-1 port. interfaces, for direct connection to higher-level SDH multiplexers Figure 1. SDH Terminal Access Multiplexer Application Data Sheet Timing Framing Specifications Internal timing (locked to the DXC G.732N master clock) G.732S with or without CRC-4 protection ELECTRICAL STM-1 PORTS Loopback timing (transmit timing locked in accordance with ITU-T Rec. G.704 Physical Layer to the clock recovered from the Unframed ITU-T Rec. G.703, Para. 12 received STM-1 signal) Nominal Data Rate Line Code Typical Transmit Power 2.048 Mbps CMI Laser: –12 dBm Timing Bit Rate Operating Wavelength Locked to the DXC master clock 155.520 Mbps, ±4.6 ppm 1310 or 1550 nm The DXC master clock can be locked to (see Ordering) one of the recovered internal E1 port Timing clock signals Internal timing (locked to the DXC Range master clock) 20 km (12.4 miles) GENERAL Loopback timing (transmit timing locked Connectors (per Port) to the clock recovered from the External STM-1 Ports Pair of ST, FC/PC, or SC (see Ordering) received STM-1 signal) DFSTM-1: one port DFSTM-1/R: two ports Connectors (per Port) INTERNAL E1 PORTS Pair of BNC coaxial, unbalanced Indicators Number of Ports L LOS – Local loss of STM-1 signal 30 E1 ports FIBER OPTIC STM-1 PORTS R LOS – Remote loss of STM-1 signal Compliance Physical Layer Diagnostics ITU-T Rec. G.732, G.823 and ITU-T Rec. G.957 User-activated STM-1 local and remote ITU-T Rec. G.704 loopbacks Line User-activated local and remote Dual optical fiber cable loopbacks on each internal E1 port Bit Rate User-activated local loopbacks on each 155.520 Mbps, ±4.6 ppm VC-12 port Figure 2. DFSTM-1 in Linear ADM (Daisy-Chain) Topology Figure 3. DXC/DFSTM-1 Converting between E1 and T1 Traffic 772-125-09/08 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 DFSTM-1 STM-1 Multiplexer Module Performance Monitoring Ordering + Optical interface wavelength and External, internal VC-12, VC-4 ports: DXC-M-FSTM1/#/+/* transmitter (not relevant with copper complies with RFC 2258 interface): Internal E1 ports: complies with RFC 1406 13L 1310 nm, single mode, laser Legend Timeslot Allocation 15L 1550 nm, single mode, laser # Link connector type (default is User-defined mapping, any timeslot to any electrical interface with coaxial BNC timeslot * Interface for a second port (default is connectors): one port): Routing of E1 Ports to TU-12s ST ST type fiber connectors R identical to the first port User-defined mapping, any E1 port to any FC FC/PC type fiber connectors R/CX coax interface TU-12 SC SC type fiber connectors R/#/+ fiber-optic interface (see Power Consumption above) 20W OPTIONAL ACCESSORIES Configuration Programmable via DXC management DXC-30M-FT/~ Fan tray for the DXC-30 chassis Physical Occupies a single slot in a DXC-8R, Legend DXC-10A or DXC-30 chassis ~ Fan tray power supply: For comparison of DXC chassis, see AC 100 to 240 VAC Table 2. For the list of DXC I/O modules, 48 –48 VDC refer to the DXC-8R/10A/30 folder. 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