Polycom VSX Series Integrator's Reference Manual page 113

Command Syntax
prichannel prichannel <set|get>
<all|<{1..23|1..30}> <on|off>
prichannel set all <on/off>
prichannel set <{1..23}> <on/off>
prichannel set <{1..30}> <on/off>
prichannel get all <on/off>
prichannel get <{1..23}> <on/off>
prichannel get <{1..30}> <on/off>
Where:
• set: Sets the PRI channels to be
active when followed by a parameter
from <all|{1..23|1..30}>}> and from
<on|off>. To erase the current
settings, omit the parameters.
• get: Returns the current setting (on
or off). Requires a parameter from
<all|{1..23|1..30}>.
• all: Selects all PRI channels.
{1..23|1..30
•
PRI channels. For PRI T1, the range
is 1..23. For PRI E1, the range is
1..30.
• on: Activates the selected PRI
channels.
• off: Disables the selected PRI
channels.
Outgoing Call. For an outgoing call, the VSX system uses the first active and available channel starting with the
lowest number from the channel range (1-23 for a PRI T1 and 1-30 for a PRI E1). If an additional channel is needed,
the system chooses the next incremental number. For example, if channels 1 through 7 are inactive, but 8 is active
and available, then 8 is the first channel that can be used by the VSX system to place an outgoing call. If an additional
channel is needed, the system will use the next available active channel in the range (which could be 9, and so on).
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.
© Polycom, Inc.
}: Range of available
Important PRI Channel Information
Description
Selects the PRI channels that
will be active for the PRI line.
See "Important PRI Channel
Information" on page 3-73 for
more information.
User interface screen location:
System > Admin Settings >
Network > ISDN (page 5):
Active Channels
Note: This screen is only acces-
sible if you have a PRI network
interface connected to your
system.
Chapter 3 - System Commands
Example
Example 1
prichannel set all
on
Example 2
prichannel set
Example 3
prichannel get 3
3 - 73