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The status/message led of telephone set may have four states:

Led is Off: On-hook state
Led blinks fast: There is an incoming call
Led is On: Off-hook state
Led blinks slow: Lost call or there is a message in VMail box or there is a personal conversation record
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Page last modified on October 31, 2016, at 01:58 AM EST
Subject to change without any notice. All rights reserved 2010 - Telesis A.S.
Iskitler Cad. No.68 Ankara, TURKEY. Tel: +90 312 3840540 Fax: +90 312 3840549