Flags Controlling Cascade Layouts; Dtmf Forwarding; Play Tone Upon Cascading Link Connection - Polycom RealPresence 1800 Administration Manual

Flags Controlling Cascade Layouts

● Setting the FORCE_1X1_LAYOUT_ON_CASCADED_LINK_CONNECTION System Flag to YES
(default) automatically forces the cascading link to Full Screen (1x1) in CP conferences, hence
displaying the speaker of one conference to a full window in the video layout of the other conference.
Set this flag to NO when cascading between an Collaboration Server and an MCU/MGC functioning
as a Gateway, if the participant layouts on the MCU/MGC are not to be forced to 1X1.
● Setting the AVOID_VIDEO_LOOP_BACK_IN_CASCADE System Flag to YES (default) prevents
the speaker's image from being sent back through the participant link from the cascaded conference.
This can occur in cascaded conferences with conference layouts other than 1x1. It results in the
speaker's own video image being displayed in the speaker's video layout.
This option is supported with:
 In IP (H.323, SIP) and ISDN-video environments.
This option is supported with Basic Cascading of Continuous Presence and Video Switched
conferences. If a Master MCU has two slave MCUs, participants connected to the slave MCUs will
not receive video from each other.
 Video resolution will be according to the Resolution Configuration, or VSW profile.
For more details on defining system flags, see

DTMF Forwarding

When two conferences are connected over an IP link, DTMF codes from one conference are not forwarded
to the second conference. The following operations with the exception, and are available throughout the
conference, with their DTMF codes forwarded (i.e. they will apply to both conferences):
● Terminate conference.
● Mute all but me.
● Unmute all but me.
● Secure conference.
● Unsecure conference.
Note: DTMF Codes Forwarding
During cascading between a gateway and a conference all DTMF codes are forwarded from the
gateway to the conference and vice versa.

Play Tone Upon Cascading Link Connection

The Collaboration Server can be configured to play a tone when a cascading link between conferences is
established. The tone is played in both conferences.
This tone is not played when the cascading link disconnects from the conferences.
The tone used to notify that the cascading link connection has been established cannot be customized.
The option to play a tone when the cascading link is established is enabled by setting the System Flag
CASCADE_LINK_PLAY_TONE_ON_CONNECTION to YES.
Default value: NO.
Polycom, Inc.
Modifying System Flags.
Cascading Conferences
68