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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
169
ilbc_15_2kpbs-iLBC_15_2kbps
ilbc_13_33kpbs-iLBC_13_33kbps
Example:
account.1.codec.g722.priority = 1
Note: The priority of the codec in the disable codec list is not specified, and numerical value 1 is
defined as the highest priority in the enable codec list. The name of the audio codec in this parameter
should be the correct one as listed in the above example, otherwise, the corresponding configuration
will not take effect.
Permitted
Values
Integer from 0 to 13 (17 for CP920 phones)
Default
When the audio codec is G722.1c (48kb/s), the default value is 1;
When the audio codec is G722.1c (32kb/s), the default value is 2;
When the audio codec is G722.1c (24kb/s), the default value is 3;
When the audio codec is G722.1 (24kb/s), the default value is 4;
When the audio codec is G722, the default value is 1 (5 for CP920 phones);
When the audio codec is PCMU, the default value is 2 (6 for CP920 phones);
When the audio codec is PCMA, the default value is 3 (7 for CP920 phones);
When the audio codec is G729, the default value is 4 (8 for CP920 phones);
When the audio codec is G726_16, the default value is 0;
When the audio codec is G726_24, the default value is 0;
When the audio codec is G726_32, the default value is 0;
When the audio codec is G726_40, the default value is 0;
When the audio codec is G723_53, the default value is 0;
When the audio codec is G723_63, the default value is 0;
When the audio codec is Opus, the default value is 0;
When the audio codec is iLBC_15_2kbps, the default value is 0;
When the audio codec is iLBC_13_33kpbs, the default value is 0;
Web UI
Account > Codec > Audio Codec
Parameter
account.X.codec.opus.para
[1]
<MAC>.cfg
Description
It configures the sample rate of the Opus audio codec.
Permitted
Values
opus-fb-Opus-FB (48KHz) (only for T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U/CP920)
opus-swb-Opus-SWB (24KHz) (only for T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U/CP920)
opus-wb-Opus-WB (16KHz)
opus-mb-Opus-MB (12KHz) (only for T57W/T54W/T53W/T53/T48U/T46U/T43U/T42U/CP920)
opus-nb-Opus-NB (8KHz)
Default
opus-wb (opus-fb for CP920 phones)
Supported
Devices
T57W, T54W, T53W, T53, T48U, T48S, T46U, T46S, T43U, T42U, T42S, T41S, T27G, CP920

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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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