Nortel Communication Server 100 Manual page 34

34 Carrier Remote IPE product description
•
Timeslot interchange that provides the correspondence between the
voice and data timeslots on the T1 or E1 carrier link and the timeslots
on the IVD bus. Timeslots on the IVD bus correspond directly to the
peripheral line card loops.
•
Signaling timeslots on each carrier link that handle the signaling
to and from the Local Carrier Interface card. It receives signaling
information from the Local Carrier Interface card and transmits it to the
Remote Carrier Interface card MPU for processing. It also processes
the signaling information in the opposite direction by receiving the
signaling information from the Remote Carrier Interface card MPU and
transmitting it to the Local Carrier Interface card MPU over the T1 or
E1 carrier links.
Carrier interface
Each Remote Carrier Interface card provides three T1 or E1 carrier
interfaces. The Remote Carrier Interface card can have three primary links
or two primary links and one spare. It provides a switch-selectable 1.5
Mbps T1 or a 2.0 Mbps E1 point-to-point transmission facility.
The T1 or E1 carrier interface performs the following functions:
•
Connects the system to Remote IPE using one to three T1 or E1
carrier links.
•
Provides a distance-selectable 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).
•
Transmits signaling information across the link by using timeslots 0 and
1 of each carrier.
•
T1 line signal coding across the carrier link is B8ZS.
•
Extended Superframe (ESF) is preferred (instead of D4) for T1 links
because it provides CRC6 error monitoring, which provides end-to-end
performance checking.
•
E1 line signal coding across the carrier link is HDB3.
•
Local system is used as the clock source to synchronize the
communication between the local and remote sites over carrier links.
•
Provides a communication channel between the Local Carrier Interface
card MPU and the Remote Carrier Interface card MPU over timeslot 2
of each carrier link. It also multiplexes the system monitor and the SDI
port information and transmits it over this carrier timeslot across the
link.
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.