Yealink SIP-T48U Administrator's Guide

Troubleshooting Methods
538
3. Select 6 from the Local Log Level drop-down menu.
The default local log level is “3”.
4. Enter the limit size of the log files in the Max Log File Size field.
5. Click Confirm to accept the change.
6.
Reproduce the issue.
7. Click Export to open the file download window, and then save the file to your local system.
A diagnostic file named <MAC>-syslog.zip is successfully exported to your local system.
Uploading Log to the USB Flash Drive
The phone log can be uploaded to the connected USB flash drive.
It is not applicable to T48G/T46G/T42G/T41P/T40P/T40G/T29G/T23P/T23G//T21(P) E2/T19(P) E2 phones.
Procedure
1. From the web user interface, navigate to Settings > Configuration.
2. In the Enable Local Log field, select Enabled or ON.
3. In the USB Auto Exporting Syslog field, select Enabled or ON.
4. Select the desired value from the Local Log Level drop-down menu.
The default local log level is “3”.
4. Enter the limit size of the log files in the Max Log File Size field.
5. Click Confirm to accept the change.
6.
Reproduce the issue.
The log files are uploaded to your USB flash drive.
Viewing the Log Files
You can verify whether you got the correct log through the following key fields:
l <0+emerg >
l <1+alert >
l <2+crit >
l <3+error >
l <4+warning >
l <5+notice >
l <6+info >
The default local log level is 3.
The following figure shows a portion of a boot log file (for example, boot.log):

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