Figure 31 lineside t1 card - block diagram – Nortel Networks Circuit Card 311 User Manual

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NT5D11 and NT5D14 Lineside T1 Interface cards

the system. The terminal equipment is assured access to analog
(500/2500-type) telephone type line functionality such as hook flash,
SPRE codes and ringback tones generated from the switch. Usually, the
Lineside T1 card eliminates the need for channel bank type equipment
normally placed between the switch and the terminal equipment. This
provides a more robust and reliable end-to-end connection. The Lineside
T1 card supports line supervision features such as loop and ground start
protocols. It can also be used in an off-premise arrangement where analog
(500/2500-type) telephones are extended over T1 with the use of channel
bank equipment.

The Lineside T1 interface offers significant improvement over the previous
alternatives. For example, if a digital trunk connection were used, such
as with the DTI/PRI interface card, lineside functionality would not be
supported. Previously, the only way to achieve the lineside functionality
was to use analog ports and channel bank equipment. No channel bank
equipment is required, resulting in a more robust and reliable connection.

Figure 31
Lineside T1 card - block diagram

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008