Functional description 181
T1 Tx signaling bitstreams onto the T1 link. It also does the opposite,
receiving Rx signaling bitstreams from the T1 link and transmitting Rx
signaling bitstreams onto the DS-30X network loop.
The line interface circuit performs the following:
•Provides an industry standard DSX-1 (0 to 655 feet) interface.
•Converts DS-30X signaling protocol into FXO A and B robbed bit
signaling protocol.
•Provides switch-selectable transmission and reception of T1 signaling
messages over a T1 link in either loop or ground start mode.
The Lineside T1 card contains one T1 line interface circuit which provides
24 individually configurable voice interfacesto one T1 link in 24 different
time slots. The circuit demultiplexes the 2.56 Mbps DS-30X Tx signaling
bitstreams from the DS-30X network loop and converts it into 1.544 mHz
T1 Tx signaling bitstreams onto the T1 link. It also does the opposite,
receiving Rx signaling bitstreams from the T1 link and transmitting Rx
signaling bitstreams onto the DS-30X network loop.
The T1 interface circuit performs the following:
•Provides an industry standard DSX-1 (0 to 655 ft/200 meters) interface.
•Converts DS-30X signaling protocol into FXO A and B robbed bit
signaling protocol.
•Provides switch-selectable transmission and reception of T1 signaling
messages over a T1 link in either loop or ground start mode.
Signaling and control
The Lineside T1 card also contains signaling and control circuits that
establish, supervise, and take down call connections. These circuits work
with the system controller to operate the T1 line interface circuit during calls.
The circuits receive outgoing call signaling messages from the controller
and return incoming call status information to the controller over the DS-30X
network loop.
The Lineside T1 card also contains signaling and control circuits that
establish, supervise, and take down call connections. These circuits work
with the system controller to operate the T1 line interface circuit during calls.
The circuits receive outgoing call signaling messages from the controller
and return incoming call status information to the controller over the DS-30X
network loop.
The Lineside T1 card also contains signaling and control circuits that
establish, supervise, and take down call connections. These circuits work
with the system controller to operate the T1 line interface circuit during calls.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23May 2008
Copyright© 2003-2008, Nor tel Networks
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