Yealink SIP-T48U Administrator's Guide

Advanced Features
452
For other phones, the BLF/BLF list DSS key LED glows green for 1000ms and then goes out.
Note: It works only if “blf.enhanced.hold.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P, T29G, T19(P) E2 and CP920
BLF Key LED/Icon and Behavior for DND State Configuration
The following table lists the parameters you can use to configure BLF key LED/icon and Behavior for DND state
(DND is activated on the monitored phone).
Parameter
blf.enhanced.dnd.enable <y0000000000xx>.cfg
Description
It enables or disables the custom configuration when DND is activated on the monitored phone.
Permitted
Values
0-Disabled
1-Enabled, the phone will display the custom BLF/BLF List DSS key LED status/icon colors.
Default
0
Supported
Devices
All phones except T48G, T46G, T42G, T41P, T29G, T19(P) E2 and CP920
Parameter
blf.enhanced.dnd.led <y0000000000xx>.cfg
Description
It configures the custom BLF/BLF List DSS key LED status/icon colors when DND is activated on the
monitored phone.
This value uses the same macro action string syntax as an Enhanced DSS key.
Example:
blf.enhanced.dnd.led = $LEDrd1000o100yd300$
For T57W/T48U/T48S phones, an infinite loop for the BLF/BLF List DSS key field: displays a red icon
for 1000ms, turns to white for 100ms and then displays a yellow icon for 300ms.
For other phones, an infinite loop for the BLF/BLF list DSS key LED status: glows red for 1000ms, be
in the off state for 100ms and then glows yellow for 300ms.
Note: It works only if “blf.enhanced.dnd.enable” is set to 1 (Enabled).
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P, T29G, T19(P) E2 and CP920
BLF Key for Intercom Configuration
The BLF key (not include BLF List key) can also be used to initiate an intercom call.
The following table lists the parameter you can use to configure BLF key for Intercom.
Parameter
features.blf.intercom_mode.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to initiate an outgoing intercom call with a monitored user when
pressing the BLF key.
Note: To use this feature, you also need to configure the intercom mode (configured by the parameter

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