Recovery Mode on Yealink IP phones 
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5.  Press          to verify the current firmware version after upgrading successfully. 
Note 
For VCS (Video Conferencing System) Series 
The section is only applicable to the VCS series including VC400, VC120, and VC110. 
The following procedures take the VC400/VC120 for reference. 
Procedures 
1.  Long press the recessed Reset key (Use the tip of a pin to hold the reset key) and press          on the 
codec to trigger the recovery mode. Do not release the Reset key until the recovery mode wizard 
appears on the display device. 
Note 
2.  Enter the desired values in the IP Address, Netmask, IP Gateway and TFTP Server fields 
respectively. 
The IP phone must be configured in the same subnet as the TFTP server. 
 
 
 
 
 
 
 
3.  Press       on the remote control to complete the recovery mode.   
The video conferencing system will download and upgrade the firmware from the TFTP server. After 
upgrading, the video conferencing system will initialize successfully and get ready for use. 
4.  Press          on the VCP40 phone to verify the current firmware version after upgrading successfully. 
You need to press          (for SIP-T19(P) E2 IP phones), tap        ->Status (for SIP VP-T49G IP 
phones), tap Settings->Status (for VP59/SIP-T58A IP phones) or tap Menu->Status (for 
SIP-T57W IP phones),          (for SIP-T3 IP phones) to verify the current firmware version since 
there is no     key.