Polycom 1500/1800/2000/4000 manual 42Kbps, fail, thus disconnecting the call, Flag Description

	System Configuration Flags
Manually Added, Modified, Deleted System Flags
Flag	Description
ALLOW_SIREN7_CODEC	When a Lync server is configured to allow 33Kbps audio rate, Lync
	clients connecting the MCU, and using audio rates smaller than
	42Kbps, fail, thus disconnecting the call.
	To prevent that, Siren7 audio codec is supported by the MCU, and
	is the preferred codec for SIP/Lync calls.
	Range:
	• YES - Siren7 is the preferred audio codec for SIP/Lync calls.
	• NO - Siren7 audio codec is not supported.
	Default value: NO
	Note: No system is required for the flag changed value to take effect.
ALWAYS_FORWARD_DTMF_IN_G	When set to YES, all DTMF codes sent by participants in the GW session
W_SESSION_TO_ISDN	will be forwarded to all PSTN and ISDN participants in the same GW
	session.
	Range: YES / NO
	Default Value: NO
ANAT_IP_PROTOCOL	If YES, enables Alternative Network Address Types. For more information,
	see Alternative Network Address Types (ANAT).
	Range: DISABLED, AUTO, PREFER_IPv4, PREFER_IPv6
	Default:
	• ULTRA SECURE MODE: NO
	• STANDARD SECURITY MODE: YES
APACHE_KEEP_ALIVE_TIMEOUT	If the connection is idle for longer than the number of seconds specified by
	this flag, the connection to the Collaboration Server is terminated.
	Value: 0 - 999
	Default: 15
	Default (ULTRA_SECURE_MODE=YES): 15
	Note: A value of 0 results in an unlimited keep-alive duration. This value
	should never be used in Ultra Secure Mode.
AVOID_VIDEO_LOOP_BACK_IN_C	When set to YES the current speaker’s image is not sent back through the
ASCADE	participant link in cascaded conferences with conference layouts other than
	1x1.

Default: YES

Range: YES / NO

Polycom®, Inc. 778