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Yealink SIP-T48U Administrator's Guide

Yealink SIP-T48U
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Phone Customization
269
Note: It is only applicable when “expansion_module.X.key.Y.type” is set to 14, 16, 24 or 39.
Permitted
Values
For multicast paging:
0 to 31
For the BLF/BLF list/intercom feature:
String within 256 characters
Default
0
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T29G, T27G
Web UI
Dsskey > Ext Key > Extension
Parameter
expansion_module.X.key.Y.xml_phonebook
[1]
<y0000000000xx>.cfg
Description
It specifies a specific group/phone book when multiple groups/phone books are configured on the
phone.
For example, both Remote Phone Book 1 “Sell and Remote Phone Book 2 “Market” are configured
on the phone, you can configure “programablekey.X.xml_phonebook = 0 to specify the Remote
Phone Book 1 “Sell” for the specific ext key. The user can press this line key to access the Remote
Phone Book 1 “Sell”.
Note: It is only applicable when “expansion_module.X.key.Y.type” is set to 22 or 45.
Permitted
Values
Integer from 0 to 48
Default
0
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T29G, T27G
Web UI
Dsskey > Ext Key > Ext KeyX > Line
[1]
X is the expansion module ID, Y is the EXT key ID. For T57W/T54W/T53W/T53/T48U/T46U/T43U, X=1-3, Y=1-60;
For T48S/T48G/T46S/T46G, X=1-6, Y=1-40; for T29G/T27G, X=1-6, Y=1-20, 22-40.
Dsskey Lock Configuration
The following table lists the parameters you can use to configure dsskey lock.
Parameter
custom.features.dsskey_lock_type <y0000000000xx>.cfg
Description
It configures which types of dsskeys to be locked on the phone.
Multiple dsskey type IDs are separated by commas.
Permitted
Values
Blank (all valid function types are not locked); dsskey type IDs. For supported dsskey types and IDs,
refer to Supported Dsskey Types.
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
custom.features.dsskey_unlock_password <y0000000000xx>.cfg
Description
It configures the password for unlocking the phone's dsskeys.
If it is set to a value, the phone prompts users to enter the password when using the corresponding
dsskey configured by "custom.features.dsskey_lock_type".
Permitted
String within 32 characters

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Yealink SIP-T48U Specifications

General IconGeneral
Handset typeWired handset
Product typeIP Phone
Product colorGray
USB 2.0 ports quantityUSB 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 supportYes
Ethernet LAN (RJ-45) ports2
Display diagonal7 \
Display resolution800 x 480 pixels
Lines quantity- lines
Phonebook capacity1000 entries
Number of VoIP accounts16
Voice codecsAGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithmsAES, HTTPS, SRTP, TLS
Ethernet LAN data rates10, 100, 1000 Mbit/s
Ethernet LAN interface typeGigabit Ethernet
Front camera-
AC adapter input voltage100 - 240 V
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)10 - 95 %
Keypad number of keys29
Number of handles included1 pc(s)
Harmonized System (HS) code85171800
Weight and Dimensions IconWeight and Dimensions
Width226 mm
Height185 mm

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