ECI XDM-300, Руководство по установке и обслуживанию

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XDM-300 Installation and
Maintenance Manual Equipment Installation
417006-2311-0H3-A00 ECI Telecom Ltd. Proprietary 3-89
Routing and Connecting Electrical Interface
Cables to Electrical Modules
N
OTE
:
The procedures in this section describe the connection
of traffic cables directly to I/O modules in the XDM-300
shelf. If your installation includes a TPU protection scheme,
some of the cables will be connected to the relevant TPM in
the TPU instead of to the I/O module, according to the site
installation plan.
Connection of the I/O modules to the TPMs is described in
Connecting Electrical Interfaces through the TPU (on page
3-97 ).
Routing and connecting multipair cables
Multipair cables are used to connect to the balanced E1 (2 Mbps) interfaces
located on the PIM2_21 and PIM2_63 electrical connection modules. One or
three pairs of cables are connected to the module, respectively.
Each cable consists of a total of 21 E1 twisted pairs per cable (transmit or
receive). The cable end connecting to the XDM-300 shelf is terminated in 2 x
50-pin SCSI male connectors.
If you are using an xDDF-21 patch panel, suitable cables should be routed from
the relevant xDDF-21 patch panel to the XDM-300 shelf location. Sufficient
length should be available to permit routing. Note that the cable must be
connected to the rear of the patch panel before it is secured in place.
To connect multipair cables:
1. Arrange the multipair traffic cables and route them through the cable guides
attached to the rack side rails.
2. Pull each multipair cable down to the level of the corresponding electrical
connection module.
3. Leave a spare length of 20 cm to 30 cm of cable folded on top of the shelf
(for modules in the upper module cage) or on the cable slack tray (for
modules in the lower module cage) for future maintenance purposes.
4. Bend the cable and thread it through the side cable guides of the rack and
through the appropriate opening of the cable guide serving the shelf, until
the cable connector is positioned against the appropriate slot. Use cable ties
as required to fasten the cable to the rack side rails.