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Yealink SIP-T48S User Manual

Yealink SIP-T48S
263 pages
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User Guide for the SIP-T48S IP Phone
88
To add a contact to the blacklist directory from the local directory:
1. Tap .
The IP phone enters the local directory directly as there is only Local Directory enabled in
the directory by default.
If Local Directory is removed from the directory (refer to Directory on page 68), tap
->Directory->All Contacts to enter the local directory.
2. Tap after the desired contact.
If the contact was added to a specified contact group, you can tap the contact group first,
and then tap after the desired contact.
3. Tap Blacklist.
The touch screen prompts the following warning:
4. Tap OK to accept the change or Cancel to cancel.
For operating instructions on editing, deleting, placing calls to and/or searching for contacts in
the blacklist directory, refer to the operating instructions of Editing Contacts on page 77,
Deleting Contacts on page 78, Placing Calls to Contacts on page 82 and/or Searching for
Contacts on page 83.

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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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