Configure Sdp Payload Types; Configure Sip Settings For Extensions - Cisco 8831 Administration Manual

Chapter 3 Configure SIP and NAT
During an active connection, the Cisco Unified IP Conference Phone 8831 for Third-Party Call Control
sends out compound RTCP packets. Each compound RTP packet, except the last one, contains a sender
report (SR) and a source description (SDES). The last RTCP packet contains an additional BYE packet.
Each SR, except the last one, contains one receiver report (RR); the last SR carries no RR.

Configure SDP Payload Types

Configured dynamic payloads are used for outbound calls only when the conference phone presents a
Session Description Protocol (SDP) offer. For inbound calls with a SDP offer, the phone follows the
caller's assigned dynamic payload type.
The IP phone conference phones use the configured codec names in outbound SDP. For incoming SDP
with standard payload types of 0-95, the IP conference phone ignores the codec names. For dynamic
payload types, the phone identifies the codec by the configured codec names (comparison is
case-sensitive).
To configure SDP payload types, navigate to Admin Login > advanced > Voice > SIP. Under SDP
Payload Types, configure these parameters:
Parameter
AVT Dynamic Payload

Configure SIP Settings for Extensions

To configure SIP settings, navigate to Admin Login > advanced > Voice > Extension. Under SIP
Settings, configure the following fields:
Parameter
SIP Transport
SIP Port
SIP 100REL Enable
The SDES contains CNAME, NAME, and TOOL identifiers:
CNAME—User ID@Proxy
–
NAME—Display Name (or Anonymous if user blocks caller ID)
–
TOOL—Vendor/Hardware-platform-software-version.
–
Description
Select from UDP, TCP or TLS. Defaults to UDP.
Port number of the SIP message listening and transmission port. Defaults to
5060.
Support of 100REL SIP extension for reliable transmission of provisional
responses (18x) and use of PRACK requests. Select Yes to enable. Defaults
to No.
Cisco Unified IP Conference Phone 8831 for Third-Party Call Control Administration Guide
Description
Any non-standard data. Both sender and receiver must agree
on a number. Ranges from 96 to 127. Defaults to 101.
Configure SIP
3-7