43967002TH Rev.1 228 /Oki Data CONFIDENTIAL 5. Maintenance Menu5.8.2 Tone For Echo5.8.2.1 TX(During send)Value Default Display conditionDisableEnableDisable NoneWhen set to EnableDIS ignore once *1: EnableEP tone addition during V29 send *2: EnableWait time between DIS – DCS *3: 1000 msWhen set to DisableDIS ignore once *1: DisableEP tone addition during V29 send *2: DisableWait time between DIS – DCS *3: 0 msThis setting is effective during all communications of direct dialing and Abbr. dialing.DIS ignore once *1:During the overseas communication, the DIS signal can be ignored once inorder to re-start the echo suppressor function that has been stopped by theCED signal. The MFP responds against the second DIS signal and sends outthe DCS signal. With this setting, the MFP can send out the DCS signal under agood line condition with less echo.This setting is used in the case when the communication error such as T.1.1occurs due to adverse effect of echo during the overseas communication.EP tone addition during V29 send *2:During the overseas send, reception of the training signal by the destinationmachine can be ensured by adding the EP tone before the sending the trainingsignal to avoid line delay.The EP tone of 0.5 seconds is added to the training signal of 9600/7200 bits/s +TCF/training + image information.The EP tone of 0.5 seconds at 1700 Hz can be destroyed by the group delay ofcommunication line so that the head portion of the training signal is damaged. Insuch a case, reception of the training signal by the destination machine can beensured by adding the EP tone before sending the training signal.Note! Some types of fax machine cannot receive the training signal9600/7200 bits/s + TCF with the EP tone. Be careful of the type ofthe fax machine.Wait time between DIS – DCS *3:Time before the DCS signal send start after the DIS signal reception end.
