Traffic Engineering - Nortel Communication Server 100 Manual

38 Carrier Remote IPE product description
If the E1 link uses coaxial cables and BNC connectors, use the NT7R67EA
Coaxial Interface Adapter Cable (one RJ -48 to BNC adapter cable for
each carrier in the link) and the impedance must be set to 75 Ohm using
SW1, SW2, SW5, and SW8 on the Local and Remote Carrier Interface
cards (refer to
and function" (page 67)
DIP-switch locations and functions" (page
An Ex carrier link can use coaxial cable connection from the local
system and the Carrier Remote IPE to the corresponding LTU or telco
demarcation point, but from there on, the network can use twisted pairs,
coaxial cable, microwave, and so on, as long as it meets the transmission
quality required for E1 carrier communication.
If a private E1 network is used, the same conditions as with the public
network apply; that is, the only cable routing that has to be done at both
sites is from the LTU or telco demarcation point to the system and to the
Carrier Remote IPE column or Carrier Remote IPE cabinet, assuming that
the carrier link already exists and does not have to be constructed.
The local carrier interface and the remote carrier interface to the carrier
link are designed for in-house environment carrier protection. To protect
the carrier link in the external environment, which is susceptible to
lightning, external line protection circuits similar to trunk protection circuits
are required before the carrier link exits the building.
The T1 carrier link line coding is B8ZS. The E1 carrier link line coding is
HDB3. The source of the clock for the carrier links is the local system.
Traffic engineering
Network blocking-in can potentially occur at three stages:
1.
the network loop or superloop associated with the originating port (line
or trunk)
2.
the loop or superloop where the call terminates
3.
the inter-group junctors bridging the connection between two network
groups in a multi-group system
In order to meet the overall Grade Of Service (GOS) requirement of 0.01
network blocking requirement, each blocking component in the network
should not be greater than one third of the total blocking. Therefore, the
blocking for a call at the originating part of the connection should be
Figure 9 "Local Carrier Interface card DIP-switch positions
and
Note:
When carriers are configured with carrier 2 as spare, carrier
0 will always have the sparing priority over carrier 1. If carrier 1 is
spared and carrier 0 becomes faulty, carrier 0 will be spared and
carrier 1 will be released.
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
Figure 14 "Remote Carrier Interface card
89)).