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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/µ-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).
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