RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 629
Dialing to Polycom® RealPresence DMA System
Two dialing methods are available to ISDN/PSTN participants calling the DMA:
Direct with automatically generated destination dial strings from dial-in strings. This option is
available only from version 7.1 and only to Collaboration Server with MPM+ and MPMx cards.
Via Gateway IVR.
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 on the DMA. For more
details, see PSTN Dial-in Using GK Prefix.

Calling a RealPresence DMA Direct with Automatically Generated

Destination Dial Strings

In this configuration, the gateway session initiator enters one of the dial-in numbers assigned to the gateway
profile. This number is truncated by the Collaboration Server gateway and the truncated digits are replaced
by a prefix that corresponds either to the DMA prefix in the Gatekeeper.
Call Flow from ISDN Endpoint to Polycom DMA with Automatically Generated Forwarded Dial String
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 prefix in Gatekeeper) 26
Number of Rightmost Digits to Append 4