Yealink SIP-T48S User Manual

Advanced Phone Features
181
Advanced Phone Features
This chapter provides operating instructions for the advanced features of the SIP-T48S IP phone.
Topics include:
 Busy Lamp Field (BLF)
 BLF List
 Call Recording
 Hot Desking
 Intercom
 Multicast Paging
 Music on Hold
 Automatic Call Distribution (ACD)
 Shared Call Appearance (SCA)
 Bridged Line Appearance (BLA)
 Messages
If you require additional information or assistance with your new phone, contact your system
administrator.
Busy Lamp Field (BLF)
You can use BLF to monitor a specific line for status changes on the phone. For example, you
can configure a BLF key on the phone to monitor the status of a friend’s line (busy or idle). The
BLF key icon illuminates solid red when the friend’s line is in use.
Configuring the BLF Feature on the IP Phone
You need to configure the IP phone to perform BLF monitoring. IP phones being monitored do
not require any configuration.
Configuring a BLF Key
To configure a BLF key via phone user interface:
1. Tap More.
2. Tap the desired line key.
3. Tap the gray box of the Type field, and then select BLF from the pull-down list.
4. Tap the gray box of the Account ID field, and then select the desired line from the
pull-down list.

Yealink SIP-T48S Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Keypad illumination	Yes
Display diagonal	7 \
Display resolution	800 x 480 pixels
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Front camera	No
Voice codecs	CNG, G.711Mu, G.711a, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Lines quantity	16 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Keypad number of keys	42
Security algorithms	AES
Networking standards	IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	SIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, HTTPS
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	225 mm
Width	266 mm
Height	185 mm
Package depth	263 mm
Package width	324 mm
Package height	128 mm