Yealink T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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The following table lists the parameters you can use to configure MWI for voice mail.
Parameter
account.X.subscribe_mwi
[1]
<MAC>.cfg
Description
It enables or disables the IP phone to subscribe the message waiting indicator.
Permitted
Values
0-Disabled, the server automatically sends a message-summary NOTIFY in a new
dialog each time the MWI status changes. (This requires server support).
1-Enabled, the IP phone will send a SUBSCRIBE message to the server for
message-summary updates.
Default
0
Web UI
Account->Advanced->Subscribe for MWI
Parameter
account.X.subscribe_mwi_expires
[1]
<MAC>.cfg
Description
It configures MWI subscribe expiry time (in seconds).
Note: It works only if “account.X.subscribe_mwi” is set to 1 (Enabled).
Permitted
Values
Integer from 0 to 84600
Default
3600
Web UI
Account->Advanced->MWI Subscription Period (Seconds)
Parameter
account.X.mwi_parse_terminated
[1]
<MAC>.cfg
Description
It enables or disables the IP phone to parse the Terminated attribute in the received
MWI NOTIFY message.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
account.X.sub_fail_retry_interval
[1]
<MAC>.cfg
Description
It configures the interval (in seconds) for the IP phone to retry to re-subscribe when
subscription fails.
Permitted
Values
Integer from 0 to 3600
Default
30
Parameter
account.X.subscribe_mwi_to_vm
[1]
<MAC>.cfg
Description
It enables or disables the IP phone to subscribe the message waiting indicator to the
voice mail number.
Note: It works only if “account.X.subscribe_mwi” is set to 1 (Enabled) and
“voice_mail.number.X” is configured.

Yealink T40G Specifications

General

SIP Accounts	3
Wall Mountable	Yes
Opus Codec	No
Display	2.3 inch 132x64-pixel graphical LCD
Network	Dual-port Gigabit Ethernet
PoE	Yes
Headset Support	Yes, RJ9 port
Power Adapter	Optional
Voice Codecs	G.722, G.711(A/μ), G.729AB, G.726
Local Phonebook	1000 entries