DLP-523: Detailed Level Procedure 363-206-285
Page 15 of 30 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
16. Refer to Table H and Figure 2 and set the DS1 line coding and frame format as
required for the TGS/TG3 circuit pack.
17.
!
CAUTION:
When all OC-3 shelves in a bay are timed from a common external timing
supply, removal of the bottom shelf
TGS/TG3
circuit pack will cause a
momentary transmission hit on all shelves in the bay.
NOTE:
A TGS/TG3 circuit pack is required in TIMING slot 1 to protect against
accidentally downloading wrong software and interrupting transmission.
Transmission configuration information is stored in the TGS/TG3 circuit
pack in TIMING slot 1. During software download procedures the
software checks the information stored in the TGS/TG3 circuit pack in
TIMING slot 1. If the information is incompatible with the controller
software information, an alarm is generated.
NOTE:
If a signal has previously been applied to the original BBF2B/BBF2C
TGS or BBF4 TG3 circuit pack, the FAULT lamp will flash when the new
BBF2B/BBF2C TGS or BBF4 TG3 is installed until the signal tests good.
Remove old BBF2B/BBF2C TGS or BBF4 TG3 and install replacement
BBF2B/BBF2C TGS or BBF4 TG3.
Response: FAULT LED on the BBF2B/BBF2C TGS or BBF4 TG3
lights (flashes) for about 15 seconds and then goes off.
18. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
Table H – BBF2B/BBF2C TGS/BBF4 TG3 DS1 Line Coding and Frame Format
Switch Settings
DS1 Line Code
Switch
DS1 Frame Format
Switch
S1-1 S1-2
AMI ON SF ON
B8ZS OFF ESF OFF
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