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2. CPX-1000 Voice Services Platform Description 1000-A2-GN22-00
2-8 February 2003
the remainder of the formula is the same for all IADs:
For example, consider three IADs with the VPI/VCI pairs and
where the maximum number of VCIs configured for the
equipment is 256:
A. 32, 100
B. 36, 100
C. 38, 100
1. All three have the same VCI.
2. The maximum number of VCIs possible (1,024) divided by
the number of VCIs configured (256) equals 4.
3. Pairs A and B yield a result with no remainder when their
VPIs (32 and 36, respectively) are divided by the resultant of
1024 divided by 256: 32/4 = 8 with a remainder of 0 and
36/4=9 with a remainder of 0. (Pair C yields a different
remainder: 38/4=9, remainder 2. Therefore, it is not in the
same group with A and B.)
A maximum 4,096 IADs can be assigned. However, only 63
simultaneously active calls through IAD unlocked ports are
allowed in any one IAD Group.
Physical
Description
The CPX hardware consists of these items (Figure 2–4):
CPX shelf (Figure 2–4)
Summary alarm panel (detail, page 2-10)
Line modules—line cards and transition cards for T1 or
STS-1 (beginning on page 2-19)
STS-1 Splitter Assembly (when STS-1 equipped)
DC Power Supply Fan and Fan modules (page 2-37)
DC power distribution panel (page 2-39)
VPI
(1024/VCIs per VPI)
Note
IAD ports can be over-provisioned; however, only 63
can obtain dial tone at one time.