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Yealink SIP-T48U Administrator's Guide

Yealink SIP-T48U
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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

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Yealink SIP-T48U Specifications

General IconGeneral
Handset typeWired handset
Product typeIP Phone
Product colorGray
USB 2.0 ports quantityUSB 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 supportYes
Ethernet LAN (RJ-45) ports2
Display diagonal7 \
Display resolution800 x 480 pixels
Lines quantity- lines
Phonebook capacity1000 entries
Number of VoIP accounts16
Voice codecsAGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithmsAES, HTTPS, SRTP, TLS
Ethernet LAN data rates10, 100, 1000 Mbit/s
Ethernet LAN interface typeGigabit Ethernet
Front camera-
AC adapter input voltage100 - 240 V
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)10 - 95 %
Keypad number of keys29
Number of handles included1 pc(s)
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Width226 mm
Height185 mm

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