2N Sip mic - Audio Codec; DTMF Payload Type; RTP Port; Codec Priority

2N TELEKOMUNIKACE a.s., www.2n.cz 37/76
– define the keep-alive packet sending period. The default Refresh rate
value is 600 s.
– enter the public IP address and NAT port to which signalling messages NAT IP
shall be sent by the opponent. Packets are then sent to the PBX as defined in the
port routing and router IP address settings.
Audio codec
Send DTMF via – choose the DTMF sending type.
– allow the classic DTMF sending in the audio band using Inband (Audio)
standardised dual tones.
– allow DTMF sending via RTP according to RFC-2833.RFC2833
– allow DTMF sending via SIP INFO messages according to RFC-SIP info
2976.
– set the payload type for DTMF: any value from 96 to 127. DTMF payload type
Make sure that the Proxy and end terminals are identical to make the function
work properly.
– set the local RTP port to be the source of the RTP stream sent from RTP port
the device.
– enable/disable the use of audio codecs offered at the call setup Codec priority
and set the priority. The options are G.711a (alaw), G.711u (ulaw) and G.722.
– set the codec specific parameters.Codec settings
Codec name
– set the size of the data block to be sent. Used for more effective Blocks
use of the bandwidth.
– use VAD for data transmission optimisation. Packets are not Use VAD
sent when the user is not speaking. VAD stands for Voice Activity
Detector.