Hi list I conncte my Panasonic KX-TCD705TW cordless phone to TDM400P FXS module. When the system boots or reboots, the LED on the backlit of TDM400P OFTEN gets off and dmesg shows problem with FXS module, as follows Zapata Telephony Interface Registered on major 196 Zaptel Version: 1.4.0 Echo Canceller: MG2 ACPI: PCI interrupt 0000:02:08.0[A] -> GSI 19 (level, low) -> IRQ 177 Freshmaker version: 71 Freshmaker passed register test Timeout waiting for calibration of module 0 Timeout waiting for calibration of module 0 Proslic Failed on Second Attempt to Auto Calibrate Proslic Failed on Second Attempt to Calibrate Manually. (Try -DNO_CALIBRATION in Makefile) Module 0: FAILED FXS (FCC) Module 1: Installed -- AUTO FXO (FCC mode) Module 2: Installed -- AUTO FXO (FCC mode) Module 3: Installed -- AUTO FXO (FCC mode) Found a Wildcard TDM: Wildcard TDM400P REV E/F (3 modules) Registered tone zone 14 (Taiwan) When this occurs, no dialtone is heard after off-hook. I have to rmmod wctdm, unplug the phone cable from TDM400P, modprobe wctdm, and plug phone cable to make this line work. The point is ztcfg without rmmod wctdm cannot make working. I run asterisk 1.4.0 / zaptel 1.4.0 on Debian 3.1r4. I compile from source. Any help or recommendation will be appreciated.