ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 55)

4. System Components
MSAP2000 Technical Manual V3.0 4-4
Slot
MSAP2000’s common shelf is as shown in Figure 4-A. Each shelf
includes 22 slots, and the slots are numbered as 1, 2, 3, ….19, 22. Slot
functions are as shown below (details can be found in Chapter 5 Slot
Chart):
Slots 21 & 22: for Power Supply Modules (PSM).
Slots 19 & 20: for MPM and EPM only.
Slot 18: GbE and REoSM
Slots 1~16: Modules that requires wiring at backplane, which include:
FXS, FXO, FXS-P, FXO-P, 2W/4W E&M, LULT/LUNT, QE1M, GSH,
V5P, N64M, V24M, ESM, AAM, MLTM.
Slots 2, 4, 6, 8, 10, 12, 14 & 16: AAM when using with REoSM.
Slots 1~18: CEoSM, OIM, ELM, PVM
There is only one MSAP2000 chassis. The same chassis can serve as a
terminal shelf, remote shelf, or an extension shelf, simply by changing
the Hardware Address on the backplane PCB.
Port
When a slot module is not based at 64Kbps (DS0), the interface access
is called a port. For example, MSAP2000’s QE1M has 4 physical ports,
so its assignation numbers are from 1~4.
Channel
When a slot module is based at 64kbps (DS0), the interface access can
be further divided by the designation of port and channel. For example,
MSAP2000’s QE1M is a subscriber module; each interface will provide
30 time slots, so the effective assignation numbers are port-1~port-30.
For POTS, since there is only one channel in each port, the channel
designation is omitted. So for each FXS-P providing 8 voice circuits, the
effective assignation numbers are 1~8. Each FXS/FXO provides 16
lines of voice circuits, so that the effective assignation numbers are
1~16. Each E&M provides 4 lines of voice services, so the effective
assignation numbers are 1~4. When a FXO is inserted into the fifth slot
of a COT main shelf, its tenth port is displayed as COT-1-5-10.