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Yealink T40G Configuring Guide

Yealink T40G
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Customizing Your Phone
7
Example:
The user registers a SIP account for the IP phone and then set the value of Timer T1, Timer T2
respectively (Timer T1: 0.5, Timer T2: 4). The SIP registration request message will be
re-transmitted between the IP phone and SIP server. The re-transmitting and doubling of Timer
T1 (0.5) will continue until the retransmitting time reaches the Timer T2 (4). The total registration
request retry time will be less than 64 times of T1 (64 * 0.5 = 32). The re-transmitting interval in
sequence is: 0.5s, 1s, 2s, 4s, 4s, 4s, 4s, 4s, 4s and 4s.
Timer T4
Timer T4 represents that the network will take to clear messages between the SIP client and
server.
Configuring SIP Session Timer
To configure SIP session timer via CommPortal phone configurator:
1. Click Preference->SIP.
2. Enter the desired value in the SIP Session Timer T1 field.
The valid value is 0.5-10s, and the default value is 0.5s.
3. Enter the desired value in the SIP Session Timer T2 field.
The valid value is 2-40s, and the default value is 4s.
4. Enter the desired value in the SIP Session Timer T4 field.
The valid value is 2.5-60s, and the default value is 5s.
5. Click Save changes to accept the change.
6. Perform auto provisioning on the phone to download above configurations. For more
information on how to perform auto provisioning, refer to Downloading Configuration
Files on page 39.

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Yealink T40G Specifications

General IconGeneral
SIP Accounts3
Wall MountableYes
Opus CodecNo
Display2.3 inch 132x64-pixel graphical LCD
NetworkDual-port Gigabit Ethernet
PoEYes
Headset SupportYes, RJ9 port
Power AdapterOptional
Voice CodecsG.722, G.711(A/μ), G.729AB, G.726
Local Phonebook1000 entries

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