Nortel Networks Circuit Card 311 - Manual (Page 387)

Functional description 387
The IPE bus interface connects one IPE bus loop that has 32 channels
operating at 64 kbps and one additional validation and signaling bit.
The Maintenance Signaling Channel (MSC) interface communicates
signaling and card identification information from the system CPU to
the UILC MCU. The signaling information also contains maintenance
instructions.
The digital pad provides gain or attenuation values to condition the level of
the digitized transmission signal according to the network loss plan. This
sets transmission levels for B-channel voice calls.
The clock converter converts the 5.12 MHz clock from the IPE backplane
into a 2.56 MHz clock to time the IPE bus channels and an 8-kHz clock to
provide PCM framing bits.
The IPE interface logic consists of a Card-LAN interface, an IPE bus
interface, a maintenance signaling channel interface, a digital pad, and a
clock converter.
The CardLAN interface is used for routine card maintenance, which includes
polling the line cards to find in which card slot the UILC is installed. It
also queries the status and identification of the card, and reports the
configuration data and firmware version of the card.
The IPE bus interface connects one IPE bus loop that has 32 channels
operating at 64 kbps and one additional validation and signaling bit.
The Maintenance Signaling Channel (MSC) interface is used to
communicate signaling and card identification information from the
Meridian 1 CPU to the UILC MCU. The signaling information also contains
maintenance instructions.
The digital pad provides gain or attenuation values to condition the level of
the digitized transmission signal according to the network loss plan. This
sets transmission levels for the B-channel circuit-switched voice calls.
The clock converter converts the 5.12 MHz clock from the IPE backplane
into a 2.56 MHz clock to time the IPE bus channels and an 8 kHz clock to
provide PCM framing bits.
The PE interface logic consists of a Card-LAN interface, a PE bus interface,
a maintenance signaling channel interface, a digital pad, and a clock
converter.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.