Yealink T40G Administrator's Guide

Audio Features
383
Description
It enables or disables the IP phone to use the AAL2-G726-16, 24, 32 and 40 MIME
type.
Permitted
Values
0-Disabled
1-Enabled
Default
0
[1]
X is the account ID. For T54S/T48S/T48G/T46S/T46G/T29G, X=1-16; for T52S/T42G/T42S, X=1-12; for
T41P/T41S/T27P/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21(P) E2, X=1-2; for T19(P) E2, X=1.
Packetization Time (PTime)
PTime is a measurement of the duration (in milliseconds) of the audio data in each RTP packet sent to the
destination, and defines how much network bandwidth is used for the RTP stream transfer. Before
establishing a conversation, codec and ptime are negotiated through SIP signaling. The valid values of
ptime range from 10 to 60, in increments of 10 milliseconds. The default ptime is 20ms. You can also
disable the ptime negotiation.
Topics
Supported PTime of Audio Codec
PTime Configuration
Supported PTime of Audio Codec
The following table summarizes the valid values of ptime for each audio codec:
Codec
Packetization Time
(Minimun)
Packetization Time (Maximun)
G722
10ms
40ms
PCMA
10ms
40ms
PCMU
10ms
40ms
G729
10ms
80ms
G726-16
10ms
30ms
G726-24
10ms
30ms
G726-32
10ms
30ms
(40ms for
T40P/T40G/T23P/T23G/T21(P)
E2/T19(P) E2)
G726-40
10ms
30ms

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