Yealink SIP-T48U Administrator's Guide

Advanced Features
444
LED Status Description
Solid green The monitored user is talking.
Slowly-flashing green (1s) The monitored user does not exist.
Off The monitored user is idle.
BLF LED Mode Configuration
The following table lists the parameters you can use to configure BLF LED Mode.
Parameter
features.blf_led_mode <y0000000000xx>.cfg
Description
It configures the BLF LED mode.
Permitted
Values
0,1,2,3,4 (4 is specifically designed for the Ribbon server)
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Web UI
Features > General Information > BLF LED Mode
BLF/BLF List Key LED Status and Behavior Configuration
You can customize the BLF LED status (or the color of BLF icon for T57W/T48U/T48S/T48G phones) and BLF/BLF
List key behavior using the EDK macros if required.
This feature depends on support from a SIP server.
Note: For more information on EDK macros, refer to Macro Action Strings.
Topics
Supported BLF/BLF List Key Behaviors
BLF Key LED/Icon and Behavior for Idle State Configuration
BLF Key LED/Icon and Behavior for Call-in State Configuration
BLF Key LED/Icon and Behavior for Call-out State Configuration
BLF Key LED/Icon and Behavior for Talking State Configuration
BLF Key LED/Icon and Behavior for Parked-Against State Configuration
BLF Key LED/Icon and Behavior for Hold State Configuration
BLF Key LED/Icon and Behavior for DND State Configuration
Supported BLF/BLF List Key Behaviors
The following behaviors are supported when pressing the BLF/BLF List keys:
l
newcall - dial out the phone number
l
btransfer - transfer the active call to the monitored user without consulting
l
ctransfer - transfer the active call to the monitored user with prior consulting
l
pickup - pick up the call directly
l
bargein - barge in and set up a conference call
l
custom EDK macros (for example, 1234$Tinvite$) - execute a series of macro action strings
l
intercom - place an intercom call to the monitored number
l
park - park the call to the monitored user, it works only when configuring "blf.enhanced.idle.talking.action"
l
retrieve - retrieve a call from the monitored user, it works only when configuring "blf.en-
hanced.parked.callin.action", “blf.enhanced.parked.talking.action” and "blf.enhanced.parked.idle.action"

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