Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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authentication.
Permitted
Values
A valid string
Default
YealinkSPIP
Parameter
sip.request_validation.event <y0000000000xx>.cfg
Description
It configures which events specified within the Event header of SUBSCRIBE or NOTIFY request
should be validated.
If it is left blank, all events will be validated.
Permitted
Values
A valid string
Default
Blank
USB Port Lock
You can lock the USB port on
T57W/T54W/T53W/T53/T48U/T48S/T48G/T46U/T46S/T46G/T43U/T42U/T42S/T41S/T29G/T27G/CP920 phones.
The following features are not available when you disable the USB port:
l Adding a Wallpaper from a USB Flash Drive
l Adding a Screensaver Picture from a USB Flash Drive
l Wi-Fi (except T57W/T54W/T53W/CP920)
l Bluetooth (except T57W/T54W/T53W/CP920)
l USB Recording
Topic
USB Port Lock Configuration
USB Port Lock Configuration
The following table lists the parameters you can use to configure the USB port lock.
Parameter
static.usb.power.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the USB port.
Permitted
Values
0-Disabled, the phone does not provide power to the USB port and not detect USB devices attached
to the USB port. All the USB devices are disabled on the phone.
1-Enabled
Default
1
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T42S, T41S, T29G,
T27G, CP920
Parameter
static.usbdisk.function.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the USB flash drive feature.
Note: It works only if "static.usb.power.enable" is set to 1 (Enabled).
Permitted
Values
0-Disabled, the phone cannot detect the USB flash drive attached to the USB port. The USB item will
not appear on the menu screen and there is no USB icon on the status bar. Only the USB flash drive
is disabled, other USB devices such as Bluetooth dongle are still available on the phone.
1-Enabled
Default
1

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