Yealink SIP-T40G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
171
Codec Packetization Time (Minimum) Packetization Time (Maximum)
opus 10ms 20ms
iLBC_15_2kpbs 20ms, 40ms, 60ms
iLBC_13_33kpbs 30ms, 60ms
PTime Configuration
The following table lists the parameter you can use to configure the PTime.
Parameter
account.X.ptime
[1]
<MAC>.cfg
Description
It configures the ptime (in milliseconds) for the codec.
Permitted
Values
0-Disabled
10-10
20-20
30-30
40-40
50-50
60-60
Default
20
Web UI
Account > Advanced > PTime (ms)
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
Early Media
The early media refers to the media (for example, audio and video) played to the caller before a SIP call is actually
established.
Current implementation supports early media through the 183 message. When the caller receives a 183 message
with SDP before the call is established, a media channel is established. This channel is used to provide the early
media stream for the caller.
You can also configure 180 ring workaround which defines whether to deal with the 180 message received after
the 183 message. When the caller receives a 183 message, it suppresses any local ringback tone and begins to
play the media received. 180 ring workaround allows the phones to resume and play the local ringback tone upon
a subsequent 180 message received.
Topic
Early Media Configuration
Early Media Configuration
The following table lists the parameters you can use to configure the early media.
Parameter
phone_setting.early_media.rtp_sniffer.timeout
[1]
<y0000000000xx>.cfg

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm