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Integrator's Reference Manual for Polycom HDX Systems
System Commands
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
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.
Polycom, Inc.
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