Filter
Top Products
SPA9000 Field Reference
Voice tab
SPA9000 Voice System Administration Guide 208
B
Voice tab > SIP page
SDP Payload Types section
The SDP Payload types defines the naming/numbering conventions for the audio
codecs used by the SPA9000 when communicating with the ITSP network.
Naming should match the ITSP names used. The default values are adequate in
most circumstances.
These settings need to be compatible with the ITSP network settings. The ITSP
you use will inform you about any specific setting you need to modify on these
areas. These parameters have impact on the signaling and audio reliability.
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 SPA9000 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/SPA9000-1.0.31(b)). The NTP timestamp used in the
SR is a snapshot of the SPA9000’s local time, not the time
reported by an NTP server. If the SPA9000 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 SPA9000 web page.
Default: 0
No UDP Checksum Select yes if you want the SPA9000 to calculate the UDP
header checksum for SIP messages. Otherwise, select no.
Default: no
Stats In BYE Determines whether the SPA9000 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>.
Default: no