Grandstream Networks UCM6102 User Manual page 101

Enable Keep-alive
Keep-alive Frequency
TEL URI
Other Settings
SRTP
Fax Detection
Strategy
Skip Trunk Auth
Codec Preference
Firmware Version 1.0.7.11
If enabled, empty SDP packet will be sent to the SIP server periodically
to keep the NAT port open. The default setting is "Yes".
Configure the number of seconds for the host to be up for Keep-alive.
The default setting is 60 seconds.
If the end device/phone has an assigned PSTN telephone number, this
field should be set to "User=Phone". Then a "User=Phone" parameter
will be attached to the Request-Line and TO header in the SIP request to
indicate the E.164 number. If set to "Enable", "Tel:" will be used instead
of "SIP:" in the SIP request. The default setting is disabled.
Enable SRTP for the call. The default setting is "No".
Enable to detect Fax signal from the user/trunk during the call and send
the received Fax to the Email address configured for this extension. If no
Email address can be found for the user, send the received Fax to the
default Email address in Fax setting page under web GUI->PBX-
>Internal Options->Fax/T.38.
Note:
If enabled, Fax Pass-through cannot be used.
This option controls how the extension can be used on devices within
different types of network.

Allow All
Device in any network can register this extension.

Local Subnet Only
Only the user in specific subnet can register this extension. Up to
three subnet addresses can be specified.

A Specific IP Address.
Only the device on the specific IP address can register this
extension.
The default setting is "Allow All".
If enabled, users will not need enter the "PIN Set" required by the
outbound rule to make outbound calls. The default setting is "No".
Select audio and video codec for the extension. The available codecs
are: PCMU, PCMA, GSM, AAL2-G.726-32, G.722, G.729, G.723, ILBC,
ADPCM, LPC10, H.264, H.263 and H.263p.
UCM6100 Series IP PBX User Manual Page 99 of 233