Welltech LP-201 Mar-11-2005 - Manual (Page 9)

SIP SIP-Phone Administration Guide
8
press letters can switch input type of letters.
♦ REDIAL: Redial the last outgoing call.
♦ + And -: Adjust the voice volume heard of communication.
♦ SPEAKER: Hand free mode. User can talk without picking up handset.
Note:
1. All function keys mentioned above (except dialing keypad) are effective only in IP
Phone mode.
2. When SIP Phone fail to register to Proxy server under Proxy mode, when user
wants to dial out, SIP Phone will play busy tone, and on LCD will display
“Register Failed.”