Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
461
Description
It enables or disables the phone to answer an incoming intercom call while there is already an active
call on the IP phone.
Note: It works only if “features.intercom.allow” and "call_waiting.enable" are set to 1 (Enabled) and
“phone_setting.call_appearance.calls_per_linekey” is greater than 1.
Permitted
Values
0-Disabled
1-Enabled, the phone will automatically answer the intercom call and place the active call on hold.
Default
0
Web UI
Features > Intercom > Intercom Barge
Phone UI
Menu > Features > Intercom > Intercom Barge
Parameter
features.intercom.barge_in_dialing.enable <y0000000000xx>.cfg
Description
It enables or disables the intercom call to answer an incoming intercom call while dialing.
Note: It works only if “features.intercom.barge” is set to 0 (Disabled).
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
features.intercom.headset_prior.enable <y0000000000xx>.cfg
Description
It configures the channel mode to use when receiving an incoming intercom call.
Permitted
Values
0-Speaker Mode
1-Headset Mode, it works only if you connect the headset to the IP phone and the headset mode is
activated for use.
Default
1
Supported
Devices
All phones except CP920
Parameter
account.X.alert_info
[1]
<MAC>.cfg
Description
It configures the value of the Alert-Info header for intercom feature.
The value format likes: <sip:XXX (X can be any value)>; answer-after=0.
Note: If both Call-Info header (defined by the parameter "account.X.call_info") and Alert-Info header
are configured, the Call-Info header has a higher priority than the Alert-Info header.
Permitted
Values
String within 256 characters
Default
Blank
[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.
CSTA Control
User Agent Computer Supported Telecommunications Applications (uaCSTA) is explained in detail in Using CSTA
for SIP Phone User Agents (uaCSTA) and Services for Computer Supported Telecommunications Applications
Phase III.

Yealink SIP-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm