Nortel DMS-100 Series Maintenance Manual page 132

3-16 SMS signaling
The dataport cross-connection figure is an example of one possible data
connection setup. The cross-connection figure shows information that flows
from the data card through the RCS and SMS into a channel bank or some
other digital facility. In this event, the digital facility is a Nortel (Northern
Telecom) channel bank. From the channel bank, data flows to the DMS-100
and switches to the terminating party. The terminating party can be a
computer, another digital switch, or some other device.
Dataport cross–connection on an SMS–RCS subsystem
A- and B-bits are not inserted into the information path for the DDS hairpin
connection. This difference is the important difference between DDS
hairpin connections and other special-service connections. This difference
occurs because DDS protocol uses the same bits as the A- and B- signaling
bits. The DDS protocol bit occupies position one in a byte.
297-8231-550 Standard 09.01 August 1998
DMS-100
Physical path
Path of cross-connection
SMS
DS-1 links
NT
channel
bank
RCS
QPP550