Isdn/Pstn Network Services - Polycom RMX 1500 Administrator's Manual

ISDN/PSTN Network Services

To enable ISDN and PSTN participants to connect to the MCU, an ISDN/PSTN Network
Service must be defined. A maximum of two ISDN/PSTN Network Services, of the same
Span Type (E1 or T1) can be defined for the RMX. Each Network Service can attach spans
from either or both cards.
Most of the parameters of the first ISDN/PSTN Network Service are configured in the Fast
Configuration Wizard, which runs automatically if an RTM ISDN card is detected in the RMX
during first time power-up. For more information, see the RMX 1500/2000/4000 Getting
Started Guide, "First Entry Power-up and Configuration" on page 2-16.
Supported Capabilities and Conferencing Features:
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Non Supported Capabilities and Conferencing Features:
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Polycom, Inc.
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.
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
Chapter 14-Network Services
14-35