Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Multiple Line Keys per Account
You can assign multiple line keys to associate with a specific account. The line keys are automatically assigned
with Line type from the first unused one (unused one means the line key is configured as N/A or the associated
account is not registered). All calls on this account will be distributed evenly among these line keys. It is useful for
managing a high volume of calls to an account.
When you assign multiple line keys to be associated with an account, you can configure the IP phone whether trans-
ferring a call or setting up a conference call on the current line key or on a new distribution line key.
It is not applicable to T19(P) E2/CP920 phones.
Topics
Multiple Line Keys per Account Configuration
Auto Line Labels Rule Configuration
Default Account
Multiple Line Keys per Account Configuration
The following table lists the parameters you can use to configure multiple line keys per account.
Parameter
features.auto_linekeys.enable <y0000000000xx>.cfg
Description
It enables or disables to assign multiple line keys to associate with a specific account.
Note: The number of the line keys is determined by “account.X.number_of_linekey”.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Web UI
Features > General Information > Auto Linekeys
Parameter
account.X.number_of_linekey
[1]
<MAC>.cfg
Description
It configures the number of line keys to be assigned with a specific account from the first unused one.
If a line key is in used, the phone will skip to the next unused DSS key.
Permitted
Values
Integer from 1 to 999
The number of the line keys varies by phone models, for the supported line keys, refer to Supported
DSS Keys.
Default
1
Supported
Devices
All phones except T19(P) E2 and CP920
Web UI
Account > Advanced > Number of Line Key
Parameter
phone_setting.call_appearance.transfer_via_new_linekey <y0000000000xx>.cfg
Description
It enables or disables to distribute a transferring call to a new line key (the new line key is not seized).
If all line keys are seized, the current line key will be used.
Note: The number of the line keys is determined by “account.X.number_of_linekey”. The value con-
figured by the parameter “account.X.phone_setting.call_appearance.transfer_via_new_linekey” takes
precedence over that configured by this parameter.
Permitted
Values
0-Disabled, the phone will transfer a call on the current line key.
1-Enabled

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