Canon FAX-B820 Service Manual

Also see for FAX-B820: User guide User guide

Contents

#1 SSWSW03 (Service Soft Switch03; Echo countermeasure setting)Bit Function 1 00 Not in use1 Echo Protect Tone for Rapid Transmission Transmit Does not transmit*2 Not in use3 Not in use4 TX Mode; International TX (1) Yes No *5 TX Mode; International TX (2) or International TX (3) Yes No *6 TX Mode International TX (3) International TX (2)*7 Tonal Signal before sending CED signal Send Does not send[Bit 1]Sending Echo Protect Tone is selectable for rapid transmission V.29 (transmission rate: 9600 bps or 7200 bps)modem signal. If error due to line condition is of frequent occurrence, please choose to send Echo ProtectTone.*If sending Echo Protect Tone is selected, non-modulation carrier is sent out as synchronizedsignal before picture transmission for approx. 200ms.[Bit 7]Sending the 1080 Hz tonal signal before CED signal is selectable.If error due to echo is of frequent occurrence when receiving fax from abroad, be sure to choose to send the tonalsignal before CED signal.[Bit 4, 5, 6]TX Mode; International TX (1), International TX (2), International TX (3) are selectable.If error due to echo when sending fax overseas is of frequent occurrence, be sure to specify TX mode setting byusing service soft switch.When selecting TX mode using service soft switch, all TX will be international TX mode.Refer to the table below and select [International TX (1)].If error still occurs, please select [International TX (2)] and then [International TX (3)].1-30