Polycom 1500/1800/2000/4000 Pstn Dial-in Using GK Prefix, Calling an IP Endpoint via Gateway

Gateway Calls

[GW Profile ISDN/PSTN number] - The dial-in number assigned to the Gateway Profile, including the required country and area codes.

For example, if the dial-in number assigned to the Gateway Profile is 5705555, enter this number with the appropriate area code: 2125705555.

Once the participant is connected to the Gateway Profile and hears the IVR message requesting the destination number, using the DTMF input keypad, the participant enters the number of the destination endpoint followed by the # key. For example, enter 3456# for IP endpoint.

To enter an IP address as the destination number, replace the periods (.) with asterisks (*) in the format n*n*n*n followed by the # key. For example, if the IP address is 172.22.188.22, enter 172*22*188*22#.

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. For a detailed description, see PSTN Dial-in Using GK Prefix.

Direct Dial-in to Endpoints or DMA VMR using Automatically Generated Destination Numbers

ISDN/PSTN participants can call the destination endpoints without interaction with the IVR of the gateway. This dialing method is enabled when the administrator configures the Gateway Profile to automatically generate the dial string of the destination endpoint or Meeting Room on the DMA by truncating the dial in string and replacing the truncated digits by other digits that can be used as the destination number.

For a detailed description of the call flow when dialing the DMA using this method, see Calling a RealPresence DMA Direct with Automatically Generated Destination Dial Strings.

Calling an IP Endpoint via Gateway

If the call destination is an IP endpoint, the endpoints must be registered to the same gatekeeper to which the Collaboration Server is registered. There should be a mapping between the dial-in numbers in the range defined for the ISDN Network Service and also assigned to the Gateway Profile and the IP endpoints, in such a way that the alias of each endpoint is the number that will be appended to the ISDN prefix.

When the call arrives to the gateway, this prefix is truncated and replaced by digits that correspond to the MCU prefix in the gatekeeper and the call is forwarded to the destination endpoint.

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