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DRAFT
© 2003 - 2005 Sipura Technology, Inc
Proprietary (See Copyright Notice on Page 2)
46
1. Valid range is 96 – 127
2. The configured dynamic payloads are used for outbound calls only where the SPA presents the SDP
offer. For inbound calls with a SDP offer, SPA will follow the caller’s dynamic payload type assignments
SDP Audio Codec Names
Parameter Name
Description
Type
Default
NSE CODEC NAME
NSE Codec name used in SDP
Str31
NSE
AVT Codec Name
AVT Codec name used in SDP
Str31
telephone-event
G711a Codec Name
G711a Codec name used in SDP
Str31
PCMA
G711u Codec Name
G711u Codec name used in SDP
Str31
PCMU
G726r16 Codec Name
G726-16 Codec name used in SDP
Str31
G726-16
G726r24 Codec Name
G726-24 Codec name used in SDP
Str31
G726-24
G726r32 Codec Name
G726-32 Codec name used in SDP
Str31
G726-32
G726r40 Codec Name
G726-40 Codec name used in SDP
Str31
G726-40
G729a Codec Name
G729a Codec name used in SDP
Str31
G729a
G729b Codec Name
G729b Codec name used in SDP
Str31
G729ab
G723 Codec Name
G723 Codec name used in SDP
Str31
G723
Notes:
1. SPA uses the configured codec names in its outbound SDP
2. SPA ignores the codec names in incoming SDP for standard payload types (0 – 95).
3. For dynamic payload types, SPA identifies the codec by the configured codec names. Comparison is
case-insensitive.
NAT Support Parameters
Parameter Name
Description
Type
Default
Handle VIA received
If set to “yes”, the SPA will process the “received”
parameter in the VIA header inserted by the server in a
response to any one of its request. Else the parameter is
ignored.
Bool No
Handle VIA rport
If set to “yes”, the SPA will process the “rport” parameter
in the VIA header inserted by the UAS in a response. Else
the parameter is ignored.
Bool No
Insert VIA received
If set to “yes”, the SPA will insert received parameter in
VIA header in SIP responses if received from IP and VIA
sent-by IP differ
Bool No
Insert VIA rport
If set to “yes”, the SPA will insert rport parameter in VIA
header in SIP responses if received-from port and VIA
sent-by port differ
Bool No
Substitute VIA addr
If set to “yes”, the SPA will use nat-mapped IP:port values
in VIA header
Bool No
Send Resp To Src Port
If set to “yes”, SPA will send a response to the source
port where the corresponding request is received from.
Else the SPA will send the response as indicated in the
VIA header by the UAC
Bool No
STUN Server
STUN server to contact for NAT mapping discovery
FQDN
STUN Enable
Enable the use of STUN to discover NAT mapping
Bool
No
STUN Test Enable
If enabled with <STUN Enable> = “yes” and a valid
<STUN Server>, the SPA will perform a NAT type
Bool No