Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
457
the value of this parameter to 0 (Disabled).
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
All phones except T19(P) E2
Parameter
account.X.bla.subscribe_uri_build_type
[1]
<MAC>.cfg
Description
It configures the constitution of the URI for BLA subscription.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA). For teltronnic BLA, you need to set
the value of this parameter to 1 (Enabled).
Permitted
Values
0-From Contact header in the SUBSCRIBE message sent by the server
1-According to the BLA number (configured by the parameter "account.X.bla_number")
Default
0
Supported
Devices
All phones except T19(P) E2
Parameter
account.X.bla_subscribe_period
[1]
<MAC>.cfg
Description
It configures the period (in seconds) of the BLA subscription.
Note: It works only if “account.X.shared_line” is set to 3 (Draft BLA).
Permitted
Values
Integer from 60 to 7200
Default
300
Supported
Devices
All phones except T19(P) E2
Web UI
Account > Advanced > BLA Subscription Period
Parameter
phone_setting.call_remote_end_when_hold.busy_tone.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to play a busy tone when a public hold call on the shared line is
retrieved by the remote party.
Note: It works only if "features.busy_tone_delay" is not set to 0.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Supported
Devices
T57W, T54W, T53W, T53, T48U, T46U, T43U, T42U, T48S, T46S, T42S, T41S, T27G and CP920
[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.
Intercom
Intercom is a useful feature in an office environment to quickly connect with the operator or the secretary. You can
press the intercom key to place a call to a contact that is answered automatically on the contact's phone as long as
the contact is not in an active call. In addition, the intercom key can be used for monitoring the status changes of a
specific line on the phone.

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