• Digital cross-connection for up to 30 n x 56/64 kbps or T1/E1 ports over copper, fiber or HDSL
• The modular DXC family includes the following chassis types:
  DXC-30 with 15 I/O modules
  DXC-30E with 15 6U high I/O modules
  DXC-10A with 5 I/O modules
  DXC-8R with 4 I/O modules
• Programmable DS0 non-blocking cross-connection
• Optional redundancy for common logic and power supply
• 1:1 protection switching
• T1/E1 conversion supports A-law/ć-law and signaling conversion
• Transmission of T1 traffic over E1. Complies with ITU-T G.802
• Broadcast support
• Inverse multiplexing module supports up to 8 T1/E1 trunks
• Controlled slip for buffer overflow/underflow
• Management:
  • Out-of-band via V.24 supervisory port or Ethernet management port
  • In-band via TS 0 or dedicated timeslot
• Traffic grooming into E3/DS3 uplinks
• RADview SNMP management system on PC or UNIX (HPOV) platform
• Telnet support
• Separate dial-in/dial-out port
• Supports SNMP agent and standard management protocols: SLIP, PPP and RIP2
• Local Loop Access solution with LTU or CSU options for extended range, built-in fiber optic, or HDSL modems
• TFTP support for common logic software upgrade
• Test and monitoring at any port

CROSS CONNECT

• DXC-30 supports up to thirty T1, E1 or n x 56/64 kbps ports. DXC-10 supports up to ten ports, while the smaller DXC-8R supports up to eight ports.
  A user-programmable connection table connects any incoming 64 kbps timeslot to any outgoing 64 kbps timeslot. Support is provided for drop & insert and broadcast. Channel relocating and half duplex conferencing are also supported.

• Cross-connection of n x 56 kbps or n x 64 kbps channels is implemented by placing the data onto a T1 or E1 frame, using only the required number of timeslots. This provides Fractional CSU/DSU functionality.

• 1+1 protection through dual cable at the port level (same module) ensures less than 50 msec link redundancy. Y-cable redundancy between modules protects the service from hardware failure.

T1/E1 CONVERTER

• DXC can function as a converter between T1 ports and E1 ports:

   

  • DXC-30 converts between up to fifteen T1 and twelve E1 ports
  • DXC-10A converts between up to five T1 and four E1 ports
  • DXC-8R converts between up to four T1 and four E1 ports.

• A-law/ć-law and signaling conversion is performed according to the T1 and E1 standards.

BASIC UNITS

• The basic DXC-30-1 (DXC-30E-1) unit includes one power supply, one common logic module (DCL.2) and fifteen I/O slots for the plug-in interface modules. Optional redundancy for the common logic and power supply is available.

• The basic DXC-10A-1 unit includes one power supply, one common logic module (DCL.2) and five I/O slots for the additional plug-in interface modules.

• The basic DXC-8R-1 unit includes two -48 VDC power supplies and two common logic modules (DCL.2) for system redundancy. DXC-8R has four I/O slots for the plug-in interface modules.

• Various timing options cover all timing possibilities for the T1/E1 interface. These include internal clock, external clock, and loopback timing sourcing from any selected T1/E1 port or n x 56/64 kbps port.
  

COMMON LOGIC

The DCL.2 common logic module stores matrix configuration and event information, as well as configuration for alarm mask. It communicates with the management station using a SLIP/PPP/Ethernet connection (by means of an SNMP agent). DCL.2 can pass management information received from 30 remote sites over a single dedicated timeslot or TS 0, to the central management site. FLASH for software download, Telnet and ASCII terminal management are also supported.

I/O MODULES

• DT1, the two-port T1 interface module, supports both D4 or ESF framing formats and AMI line code (zero suppression is selectable for either Transparent, B7ZS or B8ZS). For long range applications, a CSU option is available. The DT1B version provides BERT, loopback per timeslot, and 1+1 redundancy.

• DE1, the two-port E1 interface module, supports both 2 and 16 frames per multiframe (256N and 256S, respectively), TSO multiframe with CRC-4 and HDB3 line code. For long range applications, a CSU option is available. The DE1B version provides BERT, loopback per timeslot, and 1+1 redundancy.

• DT3, the single-port T3 interface module, supports multiplexing of up to 28 T1 channels into a T3 frame with C-bit parity per ANSI T1.404 or M13 framing options. DT3 is available with both coax and fiber interfaces.

• DE3, the single-port E3 interface module, supports multiplexing of up to 16 E1 channels into an E3 frame per ITU-T G.751. DE3 is available with both coax and fiber interfaces.

• DHS, the two-port n x 56/64 kbps data module, provides two high speed synchronous data channels. Each channel is independently selected for either V.35 or RS-422/V.11 interface. Each channel can support bit rates
  of n x 56 kbps or n x 64 kbps, where:
  n = 1 to 24 for T1,
  n = 1 to 31 for E1.

• DFO, the two-port E1/T1 Fiber Optic Link modules, enables DXC to connect directly to a fiber optic network, eliminating the need for an external fiber optic modem or repeater. DFO modules operate with different grades and sizes of single/multimode fiber optic cable and are available with LED and laser diode optical interfaces.

• DIM, the Digital Inverse Multiplexer module, working in conjunction with dual-port DE1, DE1B, DT1, DT1B, DE3 or DT3 interface modules, enables DXC to function as an inverse multiplexer. DIM allows transmission of high speed signals over up to eight T1/E1 lines. This is achieved by breaking down the high speed signals over the multiple T1/E1 lines and routing these signals over different paths or facilities, while ensuring transmission integrity.

• DHL/E1, the two-port link module, uses HDSL technology to extend the range of the DXC up to 4.0 km (2.5 miles) over 24 AWG (0.5 mm), 4-wire copper cable. It works opposite other RAD products with HDSL technology (such as HCD-E1, HTU-E1, HTU-E1L, HTU-2 and Megaplex-2100 with ML-H modules). DHL/E1 complies with ITU-T G.704 and ETSI ETR-152 standards.

• DHL/T1, the two-port link module, uses HDSL technology to extend the range of the DXC up to 4.0 km (2.5 miles) over 24 AWG (0.5 mm), 4-wire copper cable. It works opposite other RAD products with HDSL technology (such as HTU-T1, HTU-T1L and Megaplex-2100 with ML-H modules). DHL/T1 complies with ITU-T G.704 and ANSI T1E1.4.

MANAGEMENT

• Setup, control and diagnostics can be performed out-of-band via a V.24 supervisory port or optional Ethernet management port using an ASCII terminal with SLIP or PPP protocols. A built-in SNMP agent enables remote management for configuration and diagnostics of remote devices (up to 30 remote locations) using TS 0, a dedicated timeslot of T1/E1 trunk, or Telnet.

• DXC provides diagnostic loopback support for each T1/E1 and n x 56/64 kbps module. DT1B/DE1B modules support loopbacks per timeslot including an internal BERT, loopbacks toward the local or remote DTE, and PLB or LLB code injection per ANSI T1.403.

• Any port can be configured to test and monitor data on any given port of the enclosure.

• Enhanced statistics include T1 ESF diagnostics according to ANSI T1.403 and AT&T 54016 (Local Support); E1 CRC-4 diagnostics per ITU-T Rec. G.706 are performed in a manner similar to AT&T Pub. 54016.

• A separate dial-in/dial-out port supports remote configuration (dial-in) and automatic alarm indication (dial-out). For dial-out operation, an external modem is activated to automatically dial a pre-programmed number whenever an alarm event occurs.

• Multiple DXC chassis can be managed by a UNIX-based or PC-based SNMP management system. The software is
  user-friendly, GUI-based and runs under PC/Windows (RADview-PC/TDM) or HP-Openview UNIX (RADview-HPOV/TDM) systems.
  In addition, configuration and monitoring is provided via Telnet or a dumb terminal.

• Network management provides centralized control of all network nodes, including interfaces configuration, connection setup, alarm and management. Alarm status and system configurations are available at all times.

• Programming and setup of a remote DXC is accomplished either:

   

  • Via TS 0
  • Through the supervisory port of the remote unit, over a modem link or over a FRAD
  • Over a full in-band dedicated timeslot, supporting SLIP, PPP and RIP2 standard protocols

Basic units and I/O modules, as well as any additional System modules, are ordered separately.

BASIC UNITS

DXC-30-1/?/#/+
Basic unit includes chassis, one power supply and one DCL.2 common logic module (no I/O modules)

DXC-30E-1/?/#/+
Basic unit includes 6U high chassis, one power supply and one DCL.2 common logic module (no I/O modules)

DXC-10A-1/?/*
Basic unit includes chassis, AC power supply and DCL.2 common logic module (no I/O modules)

DXC-8R-1/$
Basic unit includes chassis, two DC power supplies, two DCL.2 common logic modules (no I/O modules)

SYSTEM MODULES

DXC-30M-CL.2/?
DCL.2 Common Logic No.2 Module with enhanced management, FLASH EPROM for upgrade

DXC-30M-PS/AC
115 to 230 VAC power supply (for DXC-30-1 only)

DXC-30M-PS/DC
-48 VDC or 24 VDC power supply (for DXC-30-1 only)

To order a 6U-high module version for DXC-30E chassis, add E after the DXC-M prefix of the corresponding option, for example: DXC-30ME/PS/AC

I/O MODULES
See separate data sheets

ORDERING OPTIONS