Isdn Participants - Polycom RMX 1500 Administrator's Manual

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ISDN Participants

Two dialing methods are available to ISDN/PSTN participants:

Via Gateway IVR

Direct with automatically generated destination dial strings from

dial-in strings. This dialing method is available from Version 7.1 and

is supported on RMX with MPM+ and MPMx cards.

In addition, PSTN participants can dial the Gateway IVR and can use the

MCU or DMA prefix in the gatekeeper together with the conference ID/

endpoint alias as the destination string to simplify the input. This is one of

the methods for PSTN participants to connect to a virtual Meeting Room

In this flow, the calling endpoint enters the dialing string that includes the

access number to the RMX Gateway Profile.

The endpoint connects to the RMX and is welcomed by the IVR Welcome

slide and message: "Please enter the destination number" followed by the

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 17-25.

Polycom RMX 1500/2000/4000 Administrator's Guide

Rmx 4000 Rmx 2000