Quote:
|
Originally Posted by pbxguy
i always thought DS1 23B+1D, and T1 is a straight pipe at 1.54Mbps
for example your pbx can have 1 DS1 - 23 channels and 1 signal channel
a T1 can let say connect a voicemail system at a different city...
......??????
|
As I said, it depends on which way you came up. You've been taught a derivation of the standard Nortel/Bell viewpoint - identical except you're using the term DS1 (which most Nortel folks don't use at all) instead of PRI.
ISDN PRI is officially defined as 23b+d, usually the confusion comes in with T1 vs DS1. In the Lucent Avaya universe the DS1 is the 1.54Mbps pipe, and T1 protocol divides the bandwidth into 24 56k channels.
FYI you can use either T1 or PRI protocol to voice network two PBX's (depending on the PBX's of course). T1 will give you the one extra voice path, PRI will give you additional integration features (Qsig, H.450, etc)
Cephas