Yealink SIP-T48U Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Parameter
auto_redial.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to automatically redial the last dialed number when the callee is tem-
porarily unavailable.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Features > General Information > Auto Redial
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Auto Redial
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Auto Redial
Parameter
auto_redial.interval <y0000000000xx>.cfg
Description
It configures the interval (in seconds) for the phone to wait between redials.
The phone redials the last dialed number at regular intervals untill the callee answers the call.
Permitted
Values
Integer from 1 to 300
Default
10
Web UI
Features > General Information > Auto Redial Interval (1~300s)
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Redial Interval
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Redial Interval
Parameter
auto_redial.times <y0000000000xx>.cfg
Description
It configures the auto redial times when the callee is temporarily unavailable.
The phone tries to redial the callee as many times as configured till the callee answers the call.
Permitted
Values
Integer from 1 to 300
Default
10
Web UI
Features > General Information > Auto Redial Times (1~300)
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Redial Times
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Redial Times
Parameter
features.redial_via_local_sip_server.enable <y0000000000xx>.cfg
Description
It configures the phone to redial via local SIP server or remote SIP server.
Permitted
Values
0-Remote SIP Server
1-Local SIP Server
Default
1

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