Yealink SIP-T48U Administrator's Guide

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

Yealink SIP-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
USB 2.0 ports quantity	USB 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 support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm