Yealink SIP-T27G Administrator's Guide

Audio Features
170
Web UI
Account > Codec > Opus Sample Rate
Parameter
voice.g726.aal2.enable <y0000000000xx>.cfg
Description
It enables or disables the 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 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.
Packetization Time (PTime)
PTime is a measurement of the duration (in milliseconds) that how long the audio data in each RTP packet is sent
to the destination, and defines how much the network bandwidth is used for the RTP stream transfer. Before estab-
lishing 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 (Minimum) Packetization Time (Maximum)
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
G723_53/
G723_63
30ms 60ms
iLBC 20ms 30ms

Yealink SIP-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm