Linksys ATA Administration Guide
106
SIP page
Voice tab > SIP page >
SDP Payload Types section
RTCP Tx Interval
Interval for sending out RTCP sender reports on an active connection. It can
range from 0 to 255 seconds. During an active connection, the ATA device
can be programmed to send out compound RTCP packet on the connection.
Each compound RTP packet except the last one contains a SR (Sender
Report) and a SDES.(Source Description). The last RTCP packet contains an
additional BYE packet. Each SR except the last one contains exactly 1 RR
(Receiver Report); the last SR carries no RR. The SDES contains CNAME,
NAME, and TOOL identifiers. The CNAME is set to <User ID>@<Proxy>, NAME
is set to <Display Name> (or Anonymous if user blocks caller ID), and TOOL is
set to the Vendor/Hardware-platform-software-version (such as Linksys/ATA
device-1.0.31(b)). The NTP timestamp used in the SR is a snapshot of the ATA
device’s local time, not the time reported by an NTP server. If the ATA device
receives a RR from the peer, it attempts to compute the round trip delay and
show it as the <Call Round Trip Delay> value (ms) in the Info section of ATA
device web page.
The default is
0
.
No UDP Checksum
Select yes if you want the ATA device to calculate the UDP header checksum
for SIP messages. Otherwise, select no.
The default is
no
.
Stats In BYE
Determines whether the ATA device includes the P-RTP-Stat header or
response to a BYE message. The header contains the RTP statistics of the
current call. Select yes or
no from the drop-down menu. The format of the P-
RTP-Stat header is:
P-RTP-State: PS=<packets sent>,OS=<octets sent>,PR=<packets
received>,OR=<octets received>,PL=<packets lost>,JI=<jitter in
ms>,LA=<delay in ms>,DU=<call duration in
s>,EN=<encoder>,DE=<decoder>.
The default is
no
.
Field
Description
NSE Dynamic Payload
NSE dynamic payload type. The valid range is 96-127.
The default is
100
.
AVT Dynamic Payload
AVT dynamic payload type. The valid range is 96-127.
The default is
101
.
INFOREQ Dynamic
Payload
INFOREQ dynamic payload type.
There is no default.
G726r16 Dynamic
Payload
G.726-16 dynamic payload type. The valid range is 96-127.
The default is
98
.
G726r24 Dynamic
Payload
G.726-24 dynamic payload type. The valid range is 96-127.
The default is
97
.
G726r40 Dynamic
Payload
G.726-40 dynamic payload type. The valid range is 96-127.
The default is
96
.
G729b Dynamic
Payload
G.729b dynamic payload type. The valid range is 96-127.
The default is
99
.
