Yealink SIP-T48G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
xviii
Audio Codecs .............................................................................................................................. 685
Acoustic Clarity Technology ........................................................................................................ 695
Acoustic Echo Cancellation ................................................................................................. 695
Background Noise Suppression .......................................................................................... 696
Automatic Gain Control ....................................................................................................... 696
Voice Activity Detection ....................................................................................................... 696
Comfort Noise Generation .................................................................................................. 698
Jitter Buffer ............................................................................................................................ 699
Configuring Security Features ...............................................703
User Password ............................................................................................................................. 703
Administrator Password .............................................................................................................. 705
Auto-Logout Time ......................................................................................................................... 706
Phone Lock ................................................................................................................................... 708
Transport Layer Security .............................................................................................................. 719
Secure Real-Time Transport Protocol .......................................................................................... 729
Encrypting Configuration Files ................................................................................................... 732
802.1X Authentication ................................................................................................................. 737
Troubleshooting .....................................................................749
Troubleshooting Methods ........................................................................................................... 749
Viewing Log Files .................................................................................................................. 749
Capturing Packets ................................................................................................................ 764
Enabling Watch Dog Feature .............................................................................................. 766
Getting Information from Status Indicators ........................................................................ 768
Analyzing Configuration File ............................................................................................... 768
Troubleshooting Solutions ........................................................................................................... 772
IP Address Issues .................................................................................................................. 772
Audio Issues .......................................................................................................................... 773
Wireless Issues ...................................................................................................................... 774
Upgrading Issues ................................................................................................................. 774
Provisioning Issues ................................................................................................................ 775
Resetting Issues .................................................................................................................... 776
Rebooting Issues ................................................................................................................... 780
Protocols and Ports Issues .................................................................................................... 783
Display Issues ....................................................................................................................... 786
Time and Date Issues ........................................................................................................... 786
System Log Issues................................................................................................................. 786
Phone Book Issues ................................................................................................................ 787
Password Issues .................................................................................................................... 787
Other Issues .......................................................................................................................... 787
Appendix ...............................................................................791

Yealink SIP-T48G Specifications

General

Expansion module support	Yes
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Volume control	-
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
AC adapter input voltage	100 - 240 V
Number of handles included	1 pc(s)

Weight and Dimensions

Width	266 mm
Height	185 mm