Nortel NT1R20 Description page 214

Page 190 of 290
Applications
Figure 53
LEI connection to peripheral equipment
553-3001-105 Standard 5.00 June 1999
NT5D33 and NTRB34 Line-side E1 Interface Cards
The LEI is an Intelligent Peripheral Equipment (IPE) line card that provides
cost-effective connection between E1-compatible peripheral equipment and
a Meridian 1 system or off-premise extensions over long distances.
Some examples of applications where an LEI can be interfaced to an E1 link
are:
— E1-compatible VRU equipment
— E1-compatible turret systems
— E1-compatible wireless systems
— Remote 2500 sets through E1 to channel bank
— Remote Norstar sites behind Meridian 1 over E1
The LEI is appropriate for any application where both E1 connectivity and
"line-side" functionality are required. This includes connections to
E1-compatible voice response units, voice messaging and trading turret (used
in stock market applications) systems (see Figure 53).
For example, the LEI can be used to connect the Meridian 1 to an
E1-compatible voice response unit (VRU). An example of this type of
equipment is Nortel Open IVR system. In this way, the Meridian 1 can send
a call to the VRU, and, because the LEI supports 2500-type functionality, the
VRU is able to send the call back to the Meridian 1 for further handling.