Polycom 1500/1800/2000/4000 Pstn Dial-in Using GK Prefix, Enabling Pstn dial-in using GK prefix

Gateway Calls

Example:

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

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 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.

PSTN Participant input via DTMF

	FLAG: USE_GK_PREFIX_FOR_PSTN_CALLS=
Configuration	NO	YES
Standalone Collaboration Server	PSTN participant enters:	PSTN participant enters:
Conference ID= 1234	1234#.	761234#
		(The Gatekeeper Prefix”76” is
Collaboration Server with DMA	PSTN participant enters:
		automatically removed from
Virtual Meeting Room ID in DMA =	761234#
		the DTMF input string for a
1234
		standalone Collaboration
DMA gatekeeper prefix = 76		Server.)

Polycom®, Inc. 649