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Gateway Calls
Polycom®, Inc. 646
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 to Collaboration Servers with 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