Nortel Networks 1000 - Manual (Page 973)

Architecture 973
•
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.
The D-channel interface is a 64 Kbps, full-duplex, serial bit-stream
configured as a DCE device. The data signals include receive data output,
transmit data input, receive clock output, and transmit clock output. The
receive and transmit clocks can be of slightly different bit rate from each
other as 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 however, 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
ON = DPNSS (U.K.).
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.