Yealink SIP-T3 Specifications download pdf (Page 109)

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101

Configuring Basic Features

Call Hold

Call hold provides a service of placing an active call on hold. When a call is placed on

hold, the IP phone sends an INVITE request with a HOLD SDP to the server. IP phones

support two call hold methods, one is RFC 3264, which sets the “a” (media attribute) in

the SDP to sendonly, recvonly or inactive (e.g., a=sendonly). The other is RFC 2543,

which sets the “c” (connection addresses for the media streams) in the SDP to zero (e.g.,

c=0.0.0.0). Call hold tone allows IP phones to play a hold tone at regular intervals when

there is a call on hold.

Procedure

Call hold can be configured using the configuration files or locally.

Configuration File

<y0000000000xx>.cfg

Configure the call hold tone and

call hold tone delay.

Specify whether RFC 2543

(c=0.0.0.0) outgoing hold

signaling is used.

For more information, refer to Call

Hold on page 292.

Local

Web User Interface

Configure the call hold tone and

call hold tone delay.

Specify whether RFC 2543

(c=0.0.0.0) outgoing hold

signaling is used.

Navigate to:

http://<phoneIPAddress>/servlet

?p=features-general&q=load

To configure call hold method via web user interface:

1. Click on Features->General Information.

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Yealink SIP-T3 Specifications Page 109

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