CopperOptics 150-2618-01, Руководство пользователя

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950-818-100-01, Revision 01 Installation Procedures
PCS-818 List 1 November 30, 1999 13
Audible and Visual Alarm Connections
Use a wire-wrap tool to terminate the alarm leads from the external alarm equipment on the alarm relay wire-wrap
field.
Table 4 shows the layout of the wire-wrap pins on the COT shelf backplane.
If a remote ACO switch is to be wired, refer to “External ACO Connection” on page 15 the for wire-wrap pin
field location.
Subscriber Connections From CO
Subscriber lines from the CO are connected to the COT shelf by way of four 64-pin Telco connectors (P1, P2, P3,
and P4). Tables 5 through 8 show how the subscriber services are assigned at the Telco connectors.
External Clock Connections
To terminate the clock leads from the Telco Timing Source Generator to the COT shelf backplane, do the following:
1 Connect tip of the synchronization reference to EXTCLK_T.
2 Connect ring of the synchronization reference to EXTCLK_R.
3 Connect shield of the synchronization reference to FGND.
Table 4. Alarm Relay Wire-Wrap Field
System
Alarms Critical
Visual Critical
Audible Minor
Visual Minor
Audible Major
Visual Major
Audible
Normally
Open Normally
Open Normally
Open Normally
Open Normally
Open Normally
Open Normally
Open
Common Common Common Common Common Common Common
Normally
Closed
Normally
Closed
Normally
Closed
Normally
Closed
Normally
Closed
Normally
Closed
Normally
Closed
This step is required only if a card is populated in the MUX slot and external
synchronization is desired.
The shelf can accept an external 2.048 MHz synchronization reference.