TELECOM Digest OnLine - Sorted: Meaning of ABCD bits in T-1


Meaning of ABCD bits in T-1


Andrew Chalk (achalk@magnacartasoftware.com)
Fri, 15 Jul 2005 17:28:32 GMT

Can anyone give me the "table" (or a URL to) of ABCD bit values in T1
signalling. Everywhere I Googled refers to these but none give the
meaning of each of the bit combinations. I'm particularly interested
in "off-hook/onhook" states.

Thanks!

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