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Yealink SIP-T48S User Manual

Yealink SIP-T48S
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Customizing Your Phone
97
System Customizations
Headset Use
If you want to use a wired headset, physically connect your headset to the phone and activate
the headset mode for use. For more information on physically connecting a headset, refer to
Phone Installation on page 18.
If you want to use a wireless headset, insert the Bluetooth USB dongle BT40 into the USB port at
the back of the IP phone. For more information on using a Bluetooth headset, refer to Bluetooth
on page 99.
This section provides an introduction to wired headset use.
Note
Headset Mode Activation/Deactivation
To activate the headset mode:
1. Press on the phone.
The HEADSET key LED illuminates solid green, and the icon appears on the status bar
of the touch screen.
When you tap the line key or the Answer soft key to answer an incoming call, the call is
connected to your headset automatically. For more information on using the headset to
answer a call, refer to Answering Calls on page 134.
With the handset on-hook, enter the desired number and tap Send, the phone will then
place a call using the headset automatically. For more information on using the headset to
place a call, refer to Placing Calls on page 132.
To deactivate the headset mode:
1. Press again on the phone.
The HEADSET key LED goes out, and the icon disappears from the touch screen.
Headset Prior
You can use headset in priority when headset prior feature is enabled. This feature is especially
useful for permanent or full-time headset users.
If both a Bluetooth headset and a wired headset are connected, only the Bluetooth headset can
be used.
To use headset, make sure the headset mode is enabled. Contact your system administrator
for more information.

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Yealink SIP-T48S Specifications

General IconGeneral
MountingDesk/Wall
Handset typeWired handset
Product typeIP Phone
Product colorBlack
Keypad illuminationYes
Display diagonal7 \
Display resolution800 x 480 pixels
AC adapter input voltage100 - 240 V
AC adapter output current2 A
AC adapter output voltage5 V
USB 2.0 ports quantity1
Ethernet LAN (RJ-45) ports2
Front cameraNo
Voice codecsCNG, G.711Mu, G.711a, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Lines quantity16 lines
Phonebook capacity1000 entries
Number of VoIP accounts16
Dual-Tone Multi-Frequency (DTMF) modesIn-band, Out-of band, SIP info
Keypad number of keys42
Security algorithmsAES
Networking standardsIEEE 802.3af
Ethernet LAN data rates10, 100, 1000 Mbit/s
Ethernet LAN interface typeGigabit Ethernet
Supported network protocolsSIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, HTTPS
Operating temperature (T-T)-10 - 50 °C
Operating relative humidity (H-H)10 - 95 %
Cables includedLAN (RJ-45)
Number of handles included1 pc(s)
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Depth225 mm
Width266 mm
Height185 mm
Package depth263 mm
Package width324 mm
Package height128 mm

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