Nortel Communication Server 100 Manual page 39

0.0033 or less. It is this blocking probability that yields 660 CCS capacity
for a loop and 3500 CCS capacity for a superloop in the traffic engineering
procedure.
The engineering of Carrier Remote IPE is equivalent to engineering
a segment of the call connection; it should follow the procedure
recommended in this document. The rest of the system engineering will
not be impacted by this component.
Traffic capacity
Traffic capacities of carriers meeting GOS requirements are summarized in
Table 5 "Carrier capacity calculations" (page
Table 5
Carrier capacity calculations
Carrier Type
Number of Carriers
Number of Channels
Traffic in CCS
There are some general guidelines to be followed before you start to
engineer a Carrier Remote IPE:
•
Traffic engineering for a Carrier Remote IPE with or without Central
Office between Local Carrier Interface card and Remote Carrier
Interface card is the same. This implies that available channels for any
specific configuration in the CO or CO network are at least equal to the
channels on the carrier to provide the GOS required.
•
One Local Carrier Interface card is connected to one Remote Carrier
Interface card only. There is no concentration option on the Carrier
Remote IPE.
•
One carrier out of two, or one carrier out of three, equipped is allowed
to be a spare which serves as a backup during active carrier failure but
will not carry traffic under normal conditions.
•
Capacity calculation of carriers (E1 or T1) should exclude the spare
carrier. In other words, if a spare carrier is provided, the maximum
number of channels available for traffic is 42 for T1 and 54 for E1.
•
If the number of equipped ports (lines or trunks) is less than the
number of channels (or time slots) in the carrier, there will be no
blocking at the carrier or superloop. Traffic per port can be up to 36
CCS.
•
Non-blocking on a carrier Carrier Remote IPE superloop is not
sufficient to guarantee a non-blocking system. Other parts of the call
connection need to be considered.
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
Engineering guidelines 39
39).
T1
1 2 3
21 42 63
408 1016 1665
E1
1 2 3
27 54 81
575 1384 2235