You are in a call and wish to transfer the call to another extension number.
1.) When engaged in an incoming call, press the transfer button 
.
2.) Dial the Number and press the transfer button again to complete the transfer of the active call and the Call will now be transferred to the dialed extension/number.
You may also check out a Video Guide on Blind Transfer for GRP2602W
If issues are encountered you may reach out at support@myvelox.com for further assistance.