Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 91
Example Automatic Off-Hook Placement Configuration
In the example configuration shown next, the automatic off-hook call placement feature has been enabled
for registration 1 and registration 2. If registration 1 goes off-hook, a call is placed automatically to
6416@polycom.com, the contact that has been specified for registration 1 in
call.autoOffHook.1.contact. Similarly, if registration 2 goes off-hook, a call is placed automatically
to 6417..
Configure Call Hold
The purpose of call hold is to pause activity on one call so that you can use the phone for another task,
for example, to place or receive another call or to search your phone’s menu for information. See the
table Enable Call Hold for a list of available parameters you can configure for this feature. When you
place an active call on hold, a message will inform the held party that they are on hold. You can also
configure a call hold alert to remind you after a period of time that a call is still on hold.
As of SIP 3.1, if supported by the call server, you can enter a music-on-hold URI. For more information,
see Session Initiation Protocol Service Example - Music on Hold.
Enable Call Hold
Central Provisioning Server
Specify whether to use RFC 2543 (c=0.0.0.0) or RFC 3264
(a=sendonly or a=inactive) for outgoing hold signaling
sip-interop.cfg > voIpProt.SIP.useRFC2543hold
Specify whether to use sendonly hold signaling
sip-interop.cfg > voIpProt.SIP.useSendonlyHold
Configure local call hold reminder options
sip-interop.cfg > call.hold.localReminder.*
Specify the music-on-hold URI
sip-interop.cfg > voIpProt.SIP.musicOnHold.uri
Local Phone User Interface
Navigate to Settings > Advanced > Administration Settings > SIP Server Configuration to specify whether or
not to use RFC 2543 (c=0.0.0.0) outgoing hold signaling. The alternative is RFC 3264 (a=sendonly or a=inactive).
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