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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Tech Info - ISDN

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