Yealink SIP-T48G

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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The following table lists the associated and latest firmware name for each IP phone
model (X is replaced by the actual firmware version).
IP Phone Model
Associated Firmware Name
Firmware Name Example
SIP-T48G
35.x.x.x.rom
35.80.0.60.rom
SIP-T46G
28.x.x.x.rom
28.80.0.60.rom
SIP-T42G
29.x.x.x.rom
29.80.0.60.rom
SIP-T41P
36.x.x.x.rom
36.80.0.60.rom
SIP-T40P
54.x.x.x.rom
54.80.0.70.rom
SIP-T29G
46.x.x.x.rom
46.80.0.60.rom
SIP-T27P
45.x.x.x.rom
45.80.0.60.rom
SIP-T23P/G
44.x.x.x.rom
44.80.0.60.rom
SIP-T21(P) E2
52.x.x.x.rom
52.80.0.60.rom
SIP-T19(P) E2
53.x.x.x.rom
53.80.0.60.rom
CP860
37.x.x.x.rom
37.80.0.1.rom
Note
To manually upgrade firmware via web user interface, you need to store firmware to
your local system in advance.
To upgrade firmware manually via web user interface:
1. Click on Settings->Upgrade.
2. Click Browse to locate the required firmware from your local system.
3. Click Upgrade.
You can download the latest firmware online:
http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage.
Do not unplug the network and power cables when the IP phone is upgrading firmware.