Yealink SIP-T48U Administrator's Guide

Using Handsets with T57W/T54W/T53W/T53 Phones
129
The handset can only receive incoming calls via the assigned incoming line(s). You can assign incoming lines to all
handsets that are registered to the same phone.
Note: You can only assign one outgoing line and one incoming line for the CP930W. And make sure that the outgoing line and
the incoming line are the same line.
Topic
Number Assignment Configuration
Number Assignment Configuration
The following table lists the parameters you can use to assign lines.
Parameter
handset.X.incoming_lines
[1]
<y0000000000xx>.cfg
Description
It configures the lines to receive incoming calls for a specific handset.
Permitted
Values
1-Line 1
2-Line 2
3-Line 3
4-Line 4
5-Line 5
Multiple line IDs are separated by commas.
Default
The incoming line for Corded phone is line 1-line5.
The incoming line for handset 2 is line 2.
The incoming line for handset 3 is line 3.
The incoming line for handset 4 is line 4.
The incoming line for handset 5 is line 5.
Web UI
Account > Number Assignment > Incoming lines
Handset UI
W53H/W56H:
OK > Settings > Telephony > Incoming Lines (Default PIN:0000) > HandsetX
[1]
DD Phone:
Menu > Settings > Advanced Settings (default password: 0000) > Incoming Lines
Parameter
handset.X.dial_out_lines
[1]
<y0000000000xx>.cfg
Description
It configures the lines to place outgoing calls for a specific handset.
Multiple line IDs are separated by commas.
Permitted
Values
1-Line 1
2-Line 2
3-Line 3
4-Line 4
5-Line 5
Default
The outgoing line for Corded phone is line 1-line5.
The outgoing line for handset 2 is line 2.
The outgoing line for handset 3 is line 3.

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