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Tech Info - ISDN

Pretty 'long-in-the-tooth' now but if you need high speed ('ish) switched access - ISDN is still the only real game in town.

Standards ISDN Signaling standards e.g. Q.921, 931 etc.
Messages Format of ISDN Q.931 packets.
Message Types Message Types used in ITU/NI-1/Custom implementations.
IEs Information Elements (IEs) used in ITU/NI-1/Custom implementations.
Cause IE Standard Cause IE codes.
Progress IE Standard Progress IE codes.
Signal IE Standard Signal IE codes.
Timers ITU standard ISDN Timers e.g. T305 etc.


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