Integrator’s Reference Manual for the VSX Series
4 - 200
Incoming Calls.
For incoming calls, the VSX system may use the highest
numbered channel in the range and, if needed, proceed to the next channel
number in descending order, depending on the type of third-party equipment
attached to the system. For example, an incoming call arrives on channel 23,
then 22, 21, and so on.
Dedicated full PRI T1 or E1 Line.
All channels should be active for a full T1
or E1 line dedicated to your VSX system.
Fractional PRI T1 or E1.
Channel selection should be handled by your PRI
network administrator.
PRI E1 Channel Information.
The PRI Status screen (for E1) shows 30
channels. However, E1 trunk lines have 32 timeslots, numbered 0 - 31.
Timeslot 0 is used for framing, and timeslot 16 is used for call signaling (the D
channel). The remaining 30 timeslots are used as bearer (data) channels. In call
signaling between our equipment and the switch, these channels are
numbered 1-15, 17-31. But the PRI Status screen numbers these channels
contiguously in the range 1-30. Therefore, on the PRI Status screen, channels
1-15 control the status of timeslots 1-15, and channels 16-30 control the status
of timeslots 17-31.
Summary of Contents for VSX 7000s Series
Page 169: ...System Commands 4 93 exit Ends the API command session Syntax exit ...
Page 390: ...Integrator s Reference Manual for the VSX Series A 14 ...
Page 400: ...Integrator s Reference Manual for the VSX Series C 2 ...
Page 406: ...Integrator s Reference Manual for the VSX Series E 4 ...
Page 410: ...Integrator s Reference Manual for the VSX Series F 4 ...