Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Example: Setting a Line Key as BLF List Key
The following example shows the configuration for a BLF List key.
Scenario Conditions Related Topic
phone_setting.auto_blf_list_enable = 0 BLF List Configuration
Example
linekey.1.type = 39
linekey.1.line =1
After provisioning, a BLF List key displays on line key 1. You can easily use this key to monitor a remote line. The
monitored line depends on a pre-configured SIP server.
Example: Setting a Line Key as Private Hold Key
The following example shows the configuration for a Private Hold key.
Example
linekey.1.type = 20
linekey.1.label =Private Hold
After provisioning, you can press the line key 1 to hold calls without notifying other phones registered with the
shared line, the shared line displays active to others shared line. It is only applicable to Shared Line Appearance.
Example: Setting a Line Key as Multicast Paging Key
The following example shows the configuration for a Multicast Paging key.
Example
linekey.1.type = 24
linekey.1.value = 224.5.6.20:10008
linekey.1.label = Sales
linekey.1.extension = 2
After provisioning, you can press the line key 1 to send announcements quickly to the Sales group.
Programmable Keys
You can customize programmable keys on the phone to enable users to access frequently used functions, or, if
your phone does not have a particular hard key, you can create a soft key. For example, if the phone does not have
a Do Not Disturb hard key, you can create a Do Not Disturb soft key.
The programmable key takes effect only when the IP phone is idle.
Topics
Supported Programmable Keys
Programmable Keys Configuration
Supported Programmable Keys
The following tables list programmable keys for each phone model.

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