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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
177
Permitted
Values
Integer from 0 to 400
Default
120
Web UI
Settings > Voice > Jitter Buffer > Normal
Parameter
voice.jib.wifi.adaptive <y0000000000xx>.cfg
Description
It configures the type of jitter buffer in the wireless network.
Permitted
Values
0-Fixed
1-Adaptive
Default
1
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T42S, T41S, T29G,
T27G, CP920
Parameter
voice.jib.wifi.min <y0000000000xx>.cfg
Description
It configures the minimum delay time (in milliseconds) of the jitter buffer in the wireless network.
Note: It works only if “voice.jib.wifi.adaptive” is set to 1 (Adaptive). The value of this parameter should
be less than or equal to that of “voice.jib.wifi.normal”.
Permitted
Values
Integer from 0 to 500
Default
60
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T42S, T41S, T29G,
T27G, CP920
Parameter
voice.jib.wifi.max <y0000000000xx>.cfg
Description
It configures the maximum delay time (in milliseconds) of the jitter buffer in the wireless network.
Note: It works only if “voice.jib.wifi.adaptive” is set to 1 (Adaptive). The value of this parameter should
be greater than or equal to that of “voice.jib.wifi.normal”.
Permitted
Values
Integer from 0 to 500
Default
500
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T42S, T41S, T29G,
T27G, CP920
Parameter
voice.jib.wifi.normal <y0000000000xx>.cfg
Description
It configures the normal delay time (in milliseconds) of the jitter buffer in the wireless network.
Note: It works only if “voice.jib.wifi.adaptive” is set to 0 (Fixed). The value of this parameter should be
greater than or equal to that of “voice.jib.wifi.min and less than or equal to that of “voice.jib.wifi.min”.
Permitted
Values
Integer from 0 to 500
Default
240
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T48G, T46U, T46S, T46G, T43U, T42U, T42S, T41S, T29G,
T27G, CP920
Smart Noise Block
You can use the Smart Noise Block feature to block out the local noises when there is no speech in a call.
It is only applicable to CP920 phones.

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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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