Verifying External Clock And Clock Connections - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
5.4

Verifying External Clock and Clock Connections

5.4.1 Summary
This procedure lists the steps required to check external clock connections, and to
check the external clock signal source for the FLM 150ADM. Table 5-1 describes
the connectors.
Connector Function
CN14 EXTERNAL
CLOCK
(Primary)
CN13 EXTERNAL
CLOCK
(Secondary)
5.4.2 Procedure
If an external clock source is being used, verify that the D-Sub connectors are
Step 1
installed on the appropriate primary and secondary clock cables (see Figures 5-15
and 5-16).
Connect the cables to the EXT CLK PRIM (CN14) and EXT CLK SECOND
Step 2
(CN13), respectively. Refer to the Shelf Installation practice, FJTU-320-515-200,
Section 2, Backplane Connection Procedures, for connector locations.
To retrieve any existing external clock source alarms, go to one of the following
Step 3
practices:
• If using TL1 Commands, go to the TL1 Commands practice,
FJTU-320-515-274, RTRV Commands, and check for any alarms on the
clock source.
• If using FLEXR
and check for any alarms on the clock source.
You have completed this procedure.
Issue 9, May 1999
Table 5-1: Connectors for External Clock Cables
Input of primary external clock for
interface unit in the synchronous network
Output of reference clock from Optical
Synchronous Network
Input of secondary external clock for
interface unit in the synchronous network.
Output of reference clock from Optical
Synchronous Network
®
, go to the Fujitsu FLEXR Manual, FJTU-320-900-FLX,
FNC and FNC Customer Use Only
5.4: Verifying External Clock and Clock
Description
Connections
Connector Wire
Type Gauge
9-pin D-Sub No. 22
AWG
9-pin D-Sub Mo. 22
AWG
Vol. ll, Page 480.5-15