Polycom 4000 User Manual

RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide 

Polycom®, Inc. 

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The figure above shows the call flow assuming the following parameters:

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. 

The feature is enabled by the USE_GK_PREFIX_FOR_PSTN_CALLS system flag in system.cfg. For more 
information see 

.

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

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#