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B-4
SAMPLE INSTALLATION AND MAINTENANCE PROBLEMS
LOCATION A
DS1
INTERFACE
LOCATION B
DS1
INTERFACE
CHANNEL 1
CHANNEL 2
5/0
6/0
TYPE 36
.......................
TYPE 75
5/0
6/0
CHANNEL 1
CHANNEL 2
TRANSMISSION FACILITY
CHANNEL 13
CHANNEL 14
0/0
1/0
TYPE 75
......................
TYPE 36
0/0
1/0
CHANNEL 13
CHANNEL 14
Figure B-3. Incorrect Assignment of Trunks
LOCATION A
DS1
INTERFACE
LOCATION B
DS1
INTERFACE
CHANNEL 1
CHANNEL 2
5/0
6/0
TYPE 75
......................
TYPE 75
5/0
6/0
CHANNEL 1
CHANNEL 2
TRANSMISSION FACILITY
CHANNEL 13
CHANNEL 14
0/0
1/0
TYPE 36
......................
TYPE 36
0/0
1/0
CHANNEL 13
CHANNEL 14
Figure B-4. Correct Assignment of Trunks
Figure B-1, Incorrect Translations (Procedure 260), is an extreme case for this type of problem. A
more likely scenario for the problem would be for the trunk assignments to be off by one or two
channels, causing from two to four trunks to fail.
When using CEMs (such as the BCM32000) and CDMs in a DS1/DMI network of System 85s and
System 75s, you must strictly adherence to the rules for administering procedure 260 and procedure
116.
NOTE: Due to the increased complexity of engineering networks using CEMs and CDMs, all
installations using these transmission products are currently engineered by the Regional
Engineering Centers (REC) or National Engineering Center (NEC). It is the responsibility of