Nortel Communication Server 100 Manual page 44

44 Carrier Remote IPE product description
carrier on the carrier group are required. What is the most cost effective
configuration to serve this site?
1.
To provide non-blocking to 80 lines, 80 channels are required at the
carrier.
2.
From
can provide 42 channels, which are just enough to serve half of the
requirement.
3.
Calculate card slots: 80/16 = 5. Only five card slots are needed for this
application. However, if three cards are fully equipped with lines in one
IPE module or Carrier Remote IPE cabinet, the 48 lines will exceed the
channel capacity of two-carriers at 42 for non-blocking. Three partially
equipped cards are needed. The total ports should be 42 or less at any
IPE module or Carrier Remote IPE cabinet.
4.
Configuration Summary:
IPE1 (Carrier Remote IPE cabinet): 42 non-blocking lines, 3 cards, 3
E1 carriers including one spare.
IPE2 (Carrier Remote IPE cabinet): 38 non-blocking lines, 3 cards, 3
E1 carriers including one spare.
To split lines 40-40 in this application is also acceptable. However, future
growth should be kept to 42 lines maximum at each cabinet.
Blocking Network (one IPE module and one Carrier Remote IPE
cabinet) Example 4: A university providing E1 carrier telephone
services to 400 boarding students is located one mile away from the main
administrative building where the local system is located.
Find the configuration required to serve this remote site, if the estimated
busy hour per line is 6 CCS.
1.
Calculate traffic: 400x6 = 2400 CCS. This number is greater than the
capacity of 3 E1 carriers (2235 CCS). From a traffic standpoint, two
IPE modules are needed.
2.
Calculate card slots: 400/16 = 25. This also indicates that two IPE
modules are needed. However, one IPE Module with 16 card slots and
a Carrier Remote IPE cabinet with 10 card slots are sufficient to meet
the need.
3.
Calculate traffic, card slots and carriers for the first IPE module:
2235/6 = 372 lines.
372/16 = 24 cards. This number is > 16. Only 16 cards are allowed for
the first IPE module.
16x16 = 256. 256 lines at 6 CCS each is equipped for the first IPE
module
Table 5 "Carrier capacity calculations" (page
Nortel Communication Server 1000
Carrier Remote IPE Fundamentals
NN43021-555 04.01 4 June 2010
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39), two T1 carriers