Data Sheet DXC Module DIM Digital Inverse Multiplexer Module • V.35, X.21, RS-530, and HSSI sync interfaces • High speed data rates of n × 1.920 Mbps (E1) or n × 1.472 Mbps (T1), with automatic fallback • Optional high-speed 10/100BaseT Ethernet bridge data port with VLAN support according to ITU Rec. 802.1 • Optional E1 port for inverse multiplexing of a standard E1 frame over two T1 links DIM is a digital inverse multiplexer module DIM bridges the bandwidth gap between for the modular DXC units. The DIM E1/T1 and E3/T3 traffic, allowing bridges module, working in conjunction with up to and routers to operate at their fastest eight E1/T1 ports of DE1B, DT1B, D4E1, rates. The module complies with ACCUNET D8E1, D4T1, D8T1, D4SL, D8SL, DE3, DT3 Fractional T45 service (AT&T), providing a or DFSTM-1 modules, enables DXC to choice of four new transmission speeds function as an inverse multiplexer. that are intermediate between T1 and T3 rates. DIM can also transmit Ethernet DIM transmits a single high-speed data traffic over D4SL or D8SL modules. stream of up to 15.36 Mbps over multiple E1/T1 lines. The inverse multiplexing The module occupies a single slot in the technique breaks down the high-speed DXC chassis. It can be installed in the DXC signals into multiple E1/T1 lines, and system together with other modules, to routes these signals over different paths provide a combination of cross-connect or facilities while ensuring transmission and inverse multiplexing capabilities. integrity. Differential delays of up to 64 msec between the E1/T1 lines are tolerated. Splits a single DIM compensates for such delays, and the original stream is reconstructed. high-rate logical channel into up to eight E1/T1 links The Access Company Launch Internet Explorer Browser.lnk DIM Digital Inverse Multiplexer Module DIM is available with a number of options The E1 port option enables DIM, working The above two modes provide a gapped for the user data ports, including an in conjunction with a DT1B, D4T1, D8T1, clock signal. 10/100BaseT Ethernet bridge with VLAN or DT3 module, to function as an E1 to T1 • Smooth: same as DCE, but provides a support, an E1 port, or a choice of sync rate converter. Each E1 frame smooth (constant rate) clock data interfaces: V.35, RS-530, X.21, or (2.048 Mbps) received by the DIM E1 port, • External-Smooth: same as HSSI (High Speed Serial Interface). is converted into two T1 frames External-DCE, but provides a smooth (2 × 1.544 Mbps), and then transmitted For E1 links, the total data rate is in (constant rate) clock. simultaneously over the two T1 links of multiples of 1.920 Mbps, up to the DXC T1 interface module. DIM with the Note: The E1 and HSSI ports operate in 15.36 Mbps; for T1 links, the total data E1 port complies with AT&T TR-54019 for External-DCE mode only; the Ethernet port operates rate is in multiples of 1.472 Mbps, up to E1 access over T1 facilities. in DCE mode only. 11.776 Mbps. When equipped with the 10/100BaseT Diagnostic capabilities include local and The automatic rate fallback feature Ethernet interface, DIM connects virtual remote DTE loopbacks, and a built-in ensures that the logical channel remains LANs over n × 56 kbps, or n × 64 kbps BERT. When activated, the BERT replaces open even if individual E1/T1 links fail, by lines. With the 10/100BaseT bridge DIM the DTE input and transmits a test pattern automatically dropping to the next lower filters Ethernet/Fast Ethernet frames, to all of the connected E1/T1 links. rate. When failed links are recovered, DIM forwarding only frames destined to the automatically returns to the original rate. The module occupies one I/O slot in the WAN. The 10/100BaseT module can also DXC chassis. Note: Not relevant for E1 port version. block broadcast and multicast messages. The V.35 and RS-530 channel interfaces DIM has four user-selectable clock modes terminate in 25-pin D-type female for the user data port: connectors. Pin assignment is compatible • DCE: DIM provides both TX and RX with RS-530 specifications. Special clocks to the user DTE adapter cables can be ordered to connect the V.35 channel to standalone V.35 • External-DCE: DIM provides RX clock to equipment. The X.21 channel interface the user while receiving TX clock from terminates in a 15-pin D-type female the user. connector. The HSSI channel interface terminates in a 50-pin SCSI-2 connector. Figure 1. Utilizing Multiple E1/T1 Lines for High–Speed Data Transfer Data Sheet E1 PORT Connector Specifications RJ-45 Data Rate Inverse Multiplexing 2.048 Mbps WAN Protocol Up to 8 E1/T1 links HDLC (2 T1 for E1 port version) Connectors Balanced: one RJ-45 Indicators Data Rate (for user data port) Unbalanced: two BNC coaxial LINK, ACT, 100M E1: any multiple of 1.920 Mbps, up to 15.360 Mbps Framing Compliance T1: any multiple of 1.472 Mbps, up to E1 unframed Conforms to IEEE 802.3/Ethernet, 11.776 Mbps IEEE 802.1p Compliance Automatic Rate Fallback AT&T TR-54019 for E1 access over T1 GENERAL Upon failure of an individual E1/T1 link, facilities DIM automatically falls back to the next Timing (DXC System) lower data rate 10/100 FAST ETHERNET BRIDGE PORT System clock source: Internal (± 32 ppm) E1/T1 Differential Delay LAN Table Station clock Up to 64 msec 512 MAC addresses with 5-minute Receive clock (from any link) automatic aging Clock Modes (for user data port) Diagnostics DCE, External-DCE, Smooth, Filtering and Forwarding Local and remote DTE loopbacks External-Smooth 150,000 frames per second BERT Note: The E1 and HSSI ports operate in Frame Size Physical External-DCE mode only; the Ethernet port operates 1535 bytes maximum Occupies a single slot in a DXC-8R, in DCE mode only. Buffer DXC-10A or DXC-30 chassis 85 frames (average) SYNC DATA PORT For comparison of DXC chassis, see Table 2. For the list of DXC I/O modules, Line Code Interfaces and Connectors refer to the DXC-8R/10A/30 folder. 10BaseT: Manchester V.35: 34-pin female (via adapter 100BaseT: MLT3 cable) Power Consumption RS-530: 25-pin D-type female HSSI: 9.5W Data Rate X.21: 15-pin D-type female ETUB: 7.5W 10BaseT: 10 Mbps HSSI: 50-pin SCSI-2, female Other interfaces: 5.5W 100BaseT: 100 Mbps Environment Temperature: 0°-40°C (32°-104°F) Humidity: Up to 90%, non-condensing 772-124-09/08 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 DIM Digital Inverse Multiplexer Module OPTIONAL ACCESSORIES Ordering The following cables adapt the DIM V.35 DXC-M-DIM/^ user ports DB-25 connectors to the specified applications. Cable length is 2m Legend (6 ft). ^ User port interface: V35 V.35 CBL-HS2/V/1/@ 530 RS-530 Adaptor cable for connecting a V.35 DTE X21 X.21 using DCE clock mode E1 E1 interface (E1 over two T1 CBL-HS2/V/2/@ links) ETUB Ethernet bridge port with Adaptor cable for connecting a V.35 DCE 10/100BaseT (UTP) interface using external DCE clock mode HSSI High Speed Serial Interface @ Cable connector on user side: F female M male 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