Configure The Rtp Parameters; Control Sip And Rtp Behaviour In Dual Mode - Cisco 8800 Series Administration Manual

Cisco IP Phone Installation
Before you begin
Access the phone administration web page. See
Procedure
Step 1
Select Voice > Systems.
Step 2 In the Optional Network Configuration section, enter IPv4 or IPv6 address in the Primary NTP Server
and Secondary NTP Server .
Step 3
Click Submit All Changes.

Configure the RTP Parameters

Before you begin
Access the phone administration web page. See
Procedure
Step 1 Select Voice > SIP.
Step 2
In the RTP Parameters section, set the Real-Time Transport Protocol (RTP) parameter values as described
in RTP Parameters, on page
Step 3
Click Submit All Changes.

Control SIP and RTP Behaviour in Dual Mode

You can control SIP and RTP parameters with SIP IP Preference and SDP IP Preference fields when phone
is in dual mode.
SIP IP Preference parameter defines which IP address phone tries first when it is in dual mode.
Table 12: SIP IP Preference and IP Mode
IP Mode
Dual
Mode
278.
SIP IP Address List from DNS, Priority, Result
Preference
P1 - First Priority Address
P2 - Second Priority Address
IPv4 P1- 1.1.1.1, 2009:1:1:1::1
P2 - 2.2.2.2, 2009:2:2:2::2
Result: Phone will send the SIP messages to 1.1.1.1
first.
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
Access the Phone Web Page, on page
Access the Phone Web Page, on page
Configure the RTP Parameters
88.
88.
Failover Sequence
1.1.1.1 ->2009:1:1:1:1 ->
2.2.2.2 -> 2009:2:2:2:2
65