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RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 632
Example:
The figure above shows the call flow assuming the following parameters:
PSTN Dial-in Using GK Prefix
When connecting to an Collaboration Server that is standalone or part of a DMA solution deployment, PSTN
participants are prompted by an IVR message requesting the Destination Conference ID followed by the #
key to be entered using the DTMF input keypad.
Including the Gatekeeper Prefix in the DTMF input string enables PSTN participants to use the input string
when connecting to an Collaboration Server whether the Collaboration Server is a standalone MCU or part
of a DMA solution deployment.
Enabling PSTN dial-in using GK prefix
The feature is enabled by the USE_GK_PREFIX_FOR_PSTN_CALLS system flag in system.cfg. For more
information see Modifying System Flags.
The following table summarizes the PSTN participant’s DTMF input depending on the flag value.
First Dial-in Number 5705550
Last Dial-in Number 5705560
Use Dial-in Numbers as Destination ID Selected
DMA Meeting Room ID 5555
Destination Prefix (DMA Gatekeeper) 26
Number of Rightmost Digits to Append 4
PSTN participant dials (212)5705555
PSTN Participant input via DTMF
Configuration
FLAG: USE_GK_PREFIX_FOR_PSTN_CALLS=
NO YES
Standalone Collaboration Server
Conference ID= 1234
PSTN participant enters:
1234#.
PSTN participant enters:
761234#
(The Gatekeeper Prefix”76” is
automatically removed from
the DTMF input string for a
standalone Collaboration
Server.)
Collaboration Server with DMA
Virtual Meeting Room ID in DMA =
1234
DMA gatekeeper prefix = 76
PSTN participant enters:
761234#