ATA Voice Field Reference
SIP page
Cisco Small Business ATA Administration Guide
133
B
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
Cisco/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
.