D-Channel Interface - Avaya Nortel Communication Server 1000 Reference

NTRB21 DTI/PRI/DCH TMDI card

D-channel interface

The D-channel interface is a 64 kbps, full-duplex, serial bit-stream configured as a Data Circuit-
terminating Equipment (DCE) device. The data signals include:
• receive data output
• transmit data input
• receive clock output
• transmit clock output
The bit rate of the receive and transmit clocks can vary slightly from each other. This is
determined by the transmit and receive carrier clocks.
Feature selection through software configuration for the D-channel includes:
• 56 kbps
• 64 kbps clear
• 64 kbps inverted (64 Kbps restricted)
DCHI can be enabled and disabled independent of the PRI card, as long as the PRI card is
inserted in its cabinet slot. The D-channel data link cannot be established unless the PRI loop
is enabled.
On the NTRB21 use switch 1, position 1 to select either the D-channel feature or the DPNSS
feature, as follows:
OFF = D-channel
The ON setting for DPNSS (U.K.) is not supported at this time.
OFF = D-channel
ON = DPNSS (U.K.).
OFF = D-channel
658 Circuit Card Reference
Offset
9
A
B unassigned code, FF
C
D
E
F
Comments? infodev@avaya.com
PAD set 0
–4dB
idle code, 7F
1dB
–2dB
–5db
–6db
PAD set 1
12db
3db
14db
spare
spare
spare
spare
July 2011