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  • Converts between T1 and E1 data and signaling
  • Configurable A-law/�-law and signaling conversion, or transparent conversion at 64 kbps timeslot level
  • Soft-selectable to comply with CCITT Rec. G.802, Annex 2
  • Optionally available with built-in CSU (T1) and LTU (E1)
  • Controlled slip for buffer overflow/underflow
  • Monitoring and control from terminal or from front panel
  • Loopback capabilities
  • E1/E1 or T1/T1 timeslot cross-connect with optional frame conversion
  • Compact, easy to install



The DXC - 2, T1/E1 Converter and Timeslot Cross-connect enables conversion between one T1 signal and one E1 signal (24 timeslots).

The signal can be optionally provided with a built-in CSU for T1 and LTU for E1 (see Ordering).

The DXC - 2 can also be ordered with two ports of the same type (two E1 or two T1). This allows the reshuffling of timeslots or the modifying of framing patterns; for example, D4 to ESF for a T1 product, or G.704 without CRC-4 to G.704 with CRC-4 for an E1 product.

The DXC - 2 utilizes a user- programmable connection table for connecting any incoming 64 kbps timeslot to any outgoing 64 kbps timeslot. Programming can be performed during system operation, without disruption to service.

The T1 to E1 can be set to comply with CCITT G.802, Annex 2 (soft-selectable). This enables the location of the T1 F-bit to be specified in the E1 data stream.

For conversion between T1 and E1 trunks, the DXC - 2 can perform the required A-law/�-law and signaling conversion, in compliance with T1 and E1 (CEPT) standards.

Maintenance capabilities include local and remote loopback. When operating in ESF format, T1 link statistics are stored in memory in compliance with both the ANSI and AT&T standards. When operating in CRC-4 format, E1 link statistics are stored in memory in compliance with CCITT G.706.

Selectable timing options cover all timing possibilities for the T1/E1 interface. These include internal clock and loopback timing, for either the T1 or E1 interface.

The T1 interface complies with AT&T TR-62411 and ANSI T1.403 requirements, and supports both D4 or ESF framing formats and AMI line code. Zero suppression is selectable for transparent, B7ZS or B8ZS.

The E1 interface complies with CCITT Rec. G.703, G.704, G.732 and G.823, and supports both 2 and 16 frames per multiframe without CRC-4, and framing with CRC-4. Line code is HDB3.

Setup, control, status, alarms and diagnostic information can be monitored and controlled via the front panel LCD display or via an ASCII terminal.

The DXC - 2 is a compact 1U high desk-top unit, with optional rack-mount hardware for mounting in a 19" rack (see Ordering).