24
3-2 Audio
Figure 3-2 Audio setting.
Codec 1 to 5: The preferred codec priority.
G.711u Payload Size: G.711 u-Law payload size.
G.711a Payload Size: G.711 A-law payload size.
G.729 Payload Size: G.729A payload size. It had better to select
G.729 as the first priority voice codec because of its reasonable packet
bandwidth and acceptable voice quality.
G.723.1 Payload Size: G.723.1 payload size.
This codec was used
once you are using VSAT as IP communication link and has a long
packet delay time as well as limited bandwidth. Please select 6.3 kbps
with 90ms payload time to have acceptable voice quality via VSAT.
Bit Rate: G.723.1 bit rate used.
5.3K bit rate is used
6.3K bit rate is used
Codec Priority: Selection order to match the remote SDP for codec
selection.
Codec 1 has the first priority order to use once a call was
established during codec negotiation period between two end devices.
Local SDP Order: Use local SDP order to match codec.
Remote SDP Order: Use Remote SDP order to match codec
DTMF Relay:
In-Band DTMF:
use inband DTMF instead of out of band.
RFC 2833(fall back to SIP-INFO): Use RFC 2833 if the SDP
negotiation could be done. Or use SIP INFO for DTMF relay.
SIP INFO: Use SIP-INFO DTMF relay
