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Grandstream Networks, Inc. GXW410x User Manual Page 24 of 35
Firmware Version 1.3.4.13 Last Updated: 3/2012
DTMF Method
This parameter specifies the mechanism to transmit DTMF digits. There are7
modes supported: in audio which means DTMF is combined in audio signal (not
very reliable with low bit-rate codec), via RTP (RFC2833), or via SIP INFO. Multiple
DTMF transmission schemas can be selected.
1 – in-audio
2 – RFC2833
3 – in-audio and RFC2833
4 – SIP Info
5 – in-audio and RFC2833
6 – SIP Info and RFC2833
7 – in-audio, RFC2833, and SIP Info
No Key Entry Timeout
Default is 4 seconds.
Local SIP Listen Port
Default is ch1-8:5060++;. The ++ indicates increments by 2, so port 1 is set at 5060,
port at 5062 and so on. This setting can be used with Round Robin and/or Flexible
setting below to configure different ports to be placed under different Round Robin
groups.
SRTP Mode
Default is disabled for all ports. The user can select to either enable it but not force
it or force it on an individual port basis. When used the communication will be sent
using Secure RTP.
Round Robin and/or
Flexible
Default is rr:1-8;
The syntax is pretty straight-forward here. The rr stands for Round Robin and the
numbers stand for the ports that belong to that round robin group.
For example:
rr:1-8; -> Round robin within the first 8 ports i.e. outgoing calls will be forwarded to
the next available port within the group of ports 1 to 8.
rr:1,3-6,8;rr:2,7; -> Round robin within port 1,3,4,5,6 and 8; Second round robin
group within ports 2 and 7 i.e. outgoing calls to ports 1,3,4,5,6 and 8 will be
forwarded to the next available port within this group ONLY. Outgoing calls to port 2
and 7 will be forwarded to the next available port between ports 2 and 7 ONLY.
** In order to terminate a call on FXO port 2 or 7 you will need to change its Local
SIP Listen port accordingly.
Prefix to specify Port
(1 stage dialing method)
Default is 99.
Syntax to USE this feature: prefix# (that is 99) + ch# (could be anything from 1 to 8)
+ dialing# will result in this call forwarded to FXO port (ch#) immediately.
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