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Yealink SIP-T48S User Manual

Yealink SIP-T48S
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User Guide for the SIP-T48S IP Phone
224
Phone A will dial the entered number using the selected line key.
Answering Calls
You can have one call or multiple calls on the shared line. Incoming calls will be distributed
evenly among the available line keys.
To answer a call on the shared line:
When an incoming call arrives on the shared line, the phone A and phone B will ring
simultaneously, and the icon indicators of the line key 1 on both phone A and phone B will
become and flash. You can answer the incoming call on either phone A or phone B but not
both.
Do one of the following on phone A or phone B:
- Tap the line key 1, , or tap the Answer soft key on phone A.
The icon indicators of the line key 1 on phone A and phone B will become and solid.
- Tap the line key 1, , or tap the Answer soft key on phone B.
The icon indicators of the line key 1 on phone A and phone B will become and solid.
To answer multiple calls on the shared line:
An incoming call arrives on the shared line when there is an active call on phone A’s line key 1.
The icon indicators of the line key 2 on both phone A and phone B will become and flash.
You can answer the incoming call on either phone A or phone B. The touch screen of phone A
displays the information of the incoming call (e.g., “Incoming Call: pbx.yealink.com”).
Note
Do one of the following on phone A:
- Tap the line key 2. Phone B stops ringing.
Make sure call waiting feature is enabled on phone A. For more information, refer to Call Waiting
on page 164.

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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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