Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
2
Wi-Fi
40
Wi-Fi Configuration
40
Wireless Network IP Addressing Mode Configuration
45
IPv4 Wireless Network Configuration
45
IPv6 Wireless Network Configuration
49
Real-Time Transport Protocol (RTP) Ports
52
RTP Ports Configuration
53
Network Address Translation (NAT)
53
NAT Traversal Configuration
53
Keep Alive Configuration
56
Rport Configuration
57
SIP Port and TLS Port Configuration
57
Internet Port and PC Port
58
Supported Transmission Methods
58
Internet Port and PC Port Configuration
58
VPN
60
OpenVPN Related Files
60
VPN Configuration
61
Example: Using VPN based on L2TP Prototol
62
Exporting the OpenVPN Configuration File from the Phone
63
Importing the OpenVPN Configuration File to Phone
63
Quality of Service (QoS)
63
Voice and SIP QoS Configuration
63
802.1x Authentication
64
802.1x Authentication Configuration
64
TR-069 Device Management
67
Supported RPC Methods
67
TR-069 Configuration
67
Phone Provisioning
70
Boot Files, Configuration Files, and Resource Files
70
Boot Files
70
Common Boot File
70
MAC-Oriented Boot File
71
Boot File Attributes
71
Customizing a Boot File
72
Configuration Files
72
Common CFG File
73
MAC-Oriented CFG File
73
MAC-local CFG File
74
Configuration File Customization
74
Customizing a Configuration File
74
Configuration File Attributes
74
Resource Files
75
Supported Resource Files
75

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