1214.6. CommunicationsThis section explains general troubleshooting procedures for the 400 series of Information Codes. Theseerrors are primarily caused by poor telephone line quality (loss, noise, echo, etc.). This unit is furnished withService Mode 1 to assist in troubleshooting line quality problems.It is suggested that both the transmitting unit and receiving unit be adjusted. This section gives relevantparameters in Service Mode 1 for the transmitting and receiving sides. If no improvement is realized afterthe parameters are adjusted, it is recommended that the parameters be returned to the default settings.4.6.1. Communication TroubleSTARTNoYesIs this an international#021 : Off On#025 : 1st 2nd#018 : 14400 bps 12000 to 2400 bps#024 : 2100 Hz 1080 Hz#030 : 75 ms#033 : 33600 bps 31200 to 2400 bps/TC9600/TC72001 seccommunication?Transmitting Side Receiving Side#010 : -9 dBm 0 to -15 dBmTo improve a poor S/N (signal-to-noise ratio)#017 : 14400 bps 12000 to 2400 bps#011 : -43 dBm -33 dBm or -38 dBm#018 : 14400 bps 12000 to 2400 bpsTransmitting Side Receiving SideReceiving SideTo equalize loss (Amplitude Distortion) between the fax unitand the phone company exchange#025 : 1st 2nd 1080 Hz#030 : 75 ms 1 secTo cope with shifted signal sequences caused by an echo#070 : 128 256 to 2048To cope with impulse noiseReceiving SidePerform a communication test after changing settings.Transmitting Side Receiving SideTransmitting Side#014 : 0 dBm 4, 8, 12 dBm #013 : 0 dBm 4, 8, 12 dBm#032 : 33600 bps 31200 to 2400 bps #023 : Normal Long#032 : 33600 bps 31200 to 2400 bps#024 : 2100 Hz
