Yealink SIP-T48U Administrator's Guide

Account Settings
298
Description
It enables or disables the phone to unregister first before re-registering account X after a reboot.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Account > Advanced > Unregister When Reboot
Parameter
account.X.sip_server_type
[1]
<MAC>.cfg
Description
It configures the type of SIP server.
Permitted
Values
0-Default
2-BroadSoft (It works only if “bw.enable" is set to 1 (Enabled))
8-Genesys
10-Genesys Advanced
12-Star2Star
Default
0
Web UI
Account > Advanced > SIP Server Type
Parameter
account.X.gruu.enable
[1]
<MAC>.cfg
Description
It enables or disables the Globally Routable User Agent URI (GRUU) feature.
GRUU provides a unique user-agent identifier to a specific user-agent (UA) instance. It is required in
which the REFER request must be routed to the correct UA instance, for example, a call transfer.
Permitted
Values
0-Disabled
1-Enabled, the phone will add +sip.instance attribute with the public GRUU to the Contact header of
the REGISTER message.
For example:
Contact: <sip:1012@10.2.20.160:5060>;+sip.instance="<urn:uuid:5acd54e8-f197-57e2-aa42-
5f4a5d04367c>"
Default
0
Parameter
sip.reg_surge_prevention
[2]
<y0000000000xx>.cfg
Description
It configures the waiting time (in seconds) for account register after startup.
Permitted
Values
Integer from 0 to 60
Default
0
Web UI
Network > Advanced > Registration Random > Registration Random (0~60s)
Parameter
account.X.subscribe_register
[1]
<MAC>.cfg
Description
It enables or disables the phone to subscribe to the registration state change notifications.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Account > Advanced > Subscribe Register
Parameter
phone_setting.disable_account_without_username.enable <y0000000000xx>.cfg

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