S-Series IP PBX Administrator Guide
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2) Codec
Select codec for the VoIP trunk. Yeastar S-Series supports the codecs: a-law, u-law, GSM, iLBC,
SPEEX, G722, G726, ADPCM, G729A, H261, H263, H263P, H264, MPEG4 and iLBC.
Figure 5-3 VoIP Trunk Codec
3) Advanced
Table 5-12 VoIP Trunk Configuration Parameters - Advanced
VoIP Settings
Qualify
Enable this to send SIP OPTIONS packet to SIP device to check if the
device is up.
Enable SRTP
This option enables or disable SRTP (encrypted RTP) for the trunk.
T.38 Support
Whether to enable T.38 fax for the trunk.
DTMF Mode
Set the default mode for sending DTMF tones.
RFC4733: DTMF will be carried in the RTP stream in different RTP
packets than the audio signal
Info: DTMF will be carried in the SIP Info messages
Inband: DTMF will be carried in the audio signal
Auto: will attempt to detect if the device supports RFC4733 DTMF.
If so, it will choose RFC4733; if not, it will choose Inband.
RFC4733 is the default mode.
Other Settings
Realm
Realm is a string to be displayed to users so they know which username
and password to use. If you don
’t know what to fill in, contact your service
provider for further instructions.
Send Privacy ID
Check this checkbox to send privacy ID.
Enable DNIS
Dialed Number Identification Service is a telephone service that enables a
company to identify which telephone number was dialed. Users could
configure DNIS to allow the IP phones to display which trunk is passing the
call.
DID Number
This number is used to identify which line of the trunk is passing the call.
DNIS Name
A name for this DNIS, when a call reaches the selected trunk, the name will
be displayed on the ringing phone.
