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Yealink T48s User Manual

Yealink T48s
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Time and Date
The time and date is set by the Service Provider, however you can change the format within the phone
preferences within basic settings.
Basic Call Features
Placing Calls
You can place a call in three ways using your SIP-T48S IP phone:
5. Using the handset
6. Using the speakerphone
7. Using the headset
You can also dial the number first, and then choose the way you want to speak to the other party.
You can also search and dial a contact from call history, local directory or remote phone book. During a call,
you can alternate between Speakerphone, Headset, or Handset mode by pressing the Speakerphone key, the
Headset key, or picking up the handset.
To place a call using the handset:
1. Pick up the handset.
2. Enter the desired number using the keypad.
3. Press , , or the Send soft key.
To place a call using the headset:
With the optional headset connected, press to activate the headset mode.
1. Press the line key to obtain a dial tone.
2. Enter the desired number using the keypad.
3. Press , , or the Send soft key.
With the optional headset connected, press to activate the headset mode.
1. Enter the desired number using the keypad.
2. Press , , or the Send soft key.

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Yealink T48s Specifications

General IconGeneral
Full duplexYes
Lines quantity- lines
Phonebook capacity- entries
Number of VoIP accounts-
Voice codecsAGC, AJB, CNG, G.711alaw, G.711ulaw, G.722, G.723.1, G.726, G.729A, G.729B, PLC, SILK, VAD, iLBC
Compatible productsSkype for Business
Dual-Tone Multi-Frequency (DTMF) modesIn-band, Out-of band, SIP info
MountingDesk/Wall
Handset typeWired handset
Product typeIP Phone
Product colorBlack
Volume controlDigital
USB 2.0 ports quantity1
Ethernet LAN (RJ-45) ports2
AC adapter input voltage100 - 240 V
AC adapter output current2 A
AC adapter output voltage5 V
Power consumption (typical)4.9 W
Power consumption (Power over Ethernet (PoE))7.5 W
Front cameraNo
Security algorithmsHTTPS, MD5, SRTP, TLS
Networking standardsIEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface typeGigabit Ethernet
Supported network protocolsSIP v1 (RFC2543), v2 (RFC3261), LLDP-MED VLAN, IPv4/IPv6, UDP/TCP/DNS-SRV (RFC 3263)
Cables includedLAN (RJ-45)
Number of handles included1 pc(s)
Display diagonal7 \
Touchscreen typeCapacitive
Display resolution800 x 480 pixels
Graphical user interface (GUI) languageMulti
Storage temperature (T-T)-10 - 50 °C
Operating relative humidity (H-H)10 - 95 %
Master (outer) case width660 mm
Master (outer) case length338 mm
Master (outer) case weight9000 g
Master (outer) case net weight8200 g
Quantity per master (outer) case5 pc(s)
Weight and Dimensions IconWeight and Dimensions
Depth226 mm
Width266 mm
Height185 mm
Package depth324 mm
Package width263 mm
Package height128 mm

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