NT5D11 and NT5D14 Lineside T1 Interface cards Page 233 of 894
Circuit Card Description and Installation
For example, the lineside T1 card can be used to connect the system to a
T1-compatible VRU. An example of this type of equipment is Nortel
Networks Open IVR system. In this way, the system can send a call to the
VRU. Because the lineside T1 card supports analog (500/2500-type)
telephones, the VRU is able to send the call back to the system for further
handling.
The lineside T1 card can also be used to provide off-premise extensions to
remote locations (up to 500 miles from the system). In this application, the
analog telephone functionality is extended over T1 facilities, providing a
telephone at a remote site with access to analog (500/2500-type) telephone
lines. See Figure 35 on page 234. An audible message-waiting indicator can
be provided as well.
Figure 34
Lineside T1 interface connection to IPE
553-AAA1123
Line-side T1
interface
LTI
System
Public
network
T1
Trunks
Third-party
peripheral equipment
with T1 interface