Polycom 2000/4000 manual Dialing from ISDN/PSTN Endpoints, 15-6

Chapter 15-Gateway Calls

Using the endpoint’s DTMF input device such as remote control, the participant enters the number of the destination endpoint followed by the

# key. Only one number can be dialed.

While the system dials to the destination endpoints, the participant hears the dialing rings. During the connection phase, the number being dialed is displayed on the screen of the calling endpoint.

If the call is not answered or it cannot be completed using one communication protocol, the system will try to connect the endpoint using the next communication protocol according to the selected protocols in the following order: H.323, SIP and ISDN. PSTN numbers are identified separately and are dialed immediately without trying other connections.

If the endpoint is busy, the system will not try to connect the endpoint using another protocol.

If the call is not completed after trying all possible protocols, the system displays the number that was dialed on the calling endpoint’s screen and the reason for not completing the call. For details, see "Connection Indications” on page 15-9.

Dialing from ISDN/PSTN Endpoints

Figure 15-3Dialing String and Call Flow from ISDN Endpoint to IP Endpoint

[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.

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