How can I find the following out about my switch (Option 11):
Which frame format is used?
Which protocol is used? CAS or PRI?
Clocking: Does the PBX use internal or external clocking?
Which line coding is used? AMI or B8ZS?
Print your DDB (Digital Data Block) in LD 73. That will show you where your Primary and Seconday Clock are coming from. You can also SSCK in LD 60 to show what is already running.
A third option is to look at the faceplates on the cards. In an 11C, there will be a green light next to the CC on the T1 card that has a clock controller daughterboard.
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