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Yealink SIP-T48U Administrator's Guide

Yealink SIP-T48U
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Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
91
Parameter Description
Default: Default value
Setting Up a Provisioning Server
You can use a provisioning server to configure your phones. A provisioning server allows for flexibility in upgrading,
maintaining and configuring the phone. Boot files, configuration files, and resource files are normally located on this
server.
Topics
Supported Provisioning Protocols
Supported Provisioning Server Discovery Methods
Configuring a Provisioning Server
Supported Provisioning Protocols
Yealink phones support several transport protocols for provisioning:
l Trivial File Transfer Protocol (TFTP)
l File Transfer Protocol (FTP)
l Hyper Text Transfer Protocol Secure (HTTPS)
l File Transfer Protocol Secure (FTPS)
Note: There are two types of FTP methods—active and passive. The phones are not compatible with active FTP.
You can specify the transport protocol in the provisioning server address, for example, http://xxxxxxx. If not spe-
cified, the TFTP protocol is used.
Topic
Provisioning Protocols Configuration
Provisioning Protocols Configuration
The following table lists the parameters you can use to configure provisioning protocols.
Parameter
static.auto_provision.server.type <y0000000000xx>.cfg
Description
It configures the protocol the phone uses to connect to the provisioning server.
Note: It works only if the protocol type is not defined in the access URL of the provisioning server con-
figured by the parameter "static.auto_provision.server.url".
Permitted
Values
1-http
2-https
3-ftp
Other values-tftp
Default
tftp
Parameter
static.auto_provision.user_agent_mac.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the phone's MAC address to be included in the User-Agent header of
HTTP/HTTPS request via auto provisioning.
Permitted
Values
0-Disabled
1-Enabled
Default
1

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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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