Nortel Communication Server 100 Manual page 31

The main Remote Carrier Interface card provides the following functions:
•
Provides one to three T1 or E1 carrier links to connect the Carrier
Remote IPE to the system.
•
Assigns timeslots on the T1 or E1 carrier link to timeslots of the 16
full-duplex serial loops assigned to line cards in the IPE module.
•
Provides a Remote Carrier Interface Microprocessor (RCIM) to execute
administrative and MMI port commands and manage the carrier
administration, maintenance, performance monitoring, and automatic
carrier reconfiguration.
•
Transmits signaling information across the carrier link by using
timeslots 0 and 1 of each carrier.
•
Provides a communication channel between the Local Carrier Interface
card MPU and the Remote Carrier Interface card MPU over timeslot
2 of each carrier. It also multiplexes the system monitor, Card-LAN,
and the MMI port information and transmits it over timeslot 2 across
the carrier link.
•
Uses elastic store buffers to store two frames of carrier data stream
to compensate for possible information propagation delays between
different carriers in the link. This allows for proper timeslot alignment of
all carriers on the IVD bus.
•
Provides a distance-selectable DIP switch that selects the distance
from the Remote Carrier Interface card to the first signal regenerator
such as a repeater, a CSU, or an LTU in the carrier link to be from 0 to
200 m (0 to 655 ft).
•
Converts SSD-type signaling format received from the Local Carrier
Interface card to the signaling format for digital telephones, and from
the digital telephones format to SSD-type format.
•
Polls telephones to determine the line type and its signaling protocol
and transmits this information to the Local Carrier Interface card.
•
Provides an interface for MMI administration and maintenance ports.
•
Provides continuity test, line card polling, card enabling/disabling, and
loopback testing functions.
•
Accesses up to three external alarm inputs, which are multiplexed
with maintenance and diagnostic messages sent to the Local Carrier
Interface card MPU.
•
Provides an interface for system power and alarm monitoring.
•
Performs diagnostic self-tests during power-up and when requested
by the CPU.
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
Functional description 31