RealPresence Collaboration Server (RMX) 1500/1800/2000/4000 Administrator’s Guide
Polycom®, Inc. 510

Supported Capabilities and Conferencing Features:

●ISDN video is supported only in Continuous Presence (CP) conferences.
●Only BONDING (using multiple channels as a single, large bandwidth channel) is supported.
●Simple audio negotiation.
●Supported video resolutions are the same as for IP.
●Supported video Protocols are the same as for IP: H.261, H.263, H.264.
●H.239 for content sharing.
●Lecture Mode.
●DTMF codes.
●Securing of conferences.
●Basic cascading between two MCUs using an ISDN link is available and forwarding of DTMF codes
can be suppressed.

Non Supported Capabilities and Conferencing Features:

●NFAS (Non-Facility Associated Signaling)
●Leased line usage
●Restricted Channel mode
●Aggregation of channels
●V.35 serial standards
●Primary and secondary clock source configuration (they are automatically selected by the system)
●Auto detection of Audio Only setting at endpoint
●Auto re-negotiation of bit rate
●Additional network services (two currently supported)
●Change of video mode (capabilities) from remote side during call
●Audio algorithms G.729 and G.723.1
●FECC
●H.243 Chair Control
●T.120 data sharing protocol
●H.261 Annex D
●MIH Cascading using an ISDN connection as cascade link
Adding/Modifying ISDN/PSTN Network Services
The system administrator can use the RMX Management – ISDN/PSTN Network Services section of the
Collaboration Server Web Client to add a second ISDN/PSTN Network Service or modify the first
ISDN/PSTN Network Service.
A new ISDN/PSTN Network Service can be defined even if no RTM ISDN card is installed in the
system.