ECI XDM-300, Руководство по установке и обслуживанию

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Equipment Installation XDM-300 Installation and
Maintenance Manual
3-92 ECI Telecom Ltd. Proprietary 417006-2311-0H3-A00
Connecting I/O Protection Cables in the
XDM-300
The optional TPU shelf can be mounted on top and/or under the XDM-300
shelf to add I/O protection capability to the platform.
Each Tributary Protection Module (TPM) is connected to both operating and
protection I/O modules in the XDM-300 shelf.
If a failure is detected in one of the operating I/O modules, the TC module in
the TPU switches the traffic from the operating I/O module to the protection
module.
The TPU has four slots for TPMs. The modules are connected to the main and
protection I/O modules by traffic cables, and the client's traffic is connected
directly to the TPMs.
TPMs support the electrical PIMs and SIMs with the following protection
schemes:
|
TPMs for a 1:1 protection scheme, where one protection module is
connected to a single I/O module
| TPMs for a 1:2 protection scheme, where one protection module is
connected to one or two I/O modules
|
TPMs for a 1:3 protection scheme, where one protection module is
connected to two or three I/O modules
The TPU connects to a connector on top of the XDM-300 shelf. Similarly the
lower TPU connects to a connector at the bottom of the shelf. These connectors
provide the power and control buses required for the TPU operation.
The modules in the TPU are distributed as follows:
|
The rightmost TPU slot is allocated for the TC module. The TC module is
described in (COM RM) TC.
| The other four slots are used for any combination of TPMs (single slot,
double-slot, or triple-slot modules are supported).
The TPMs available for the I/O protection are:
| TPM2_1
|
TPM2_3
| TPM2_63_2
|
TPMH_1