How to configure the MonTel Server PC for safer Serial SMDR

Often a PABX will be connected to a three wire serial cable with out consideration of Handshaking or flow control. While this configuration will work, it will not provide an optimal solution if the PABX supports hardware hand shaking, and especially if it does support handshaking and has a CDR or SMDR output buffer.

In short if there is a CDR or SMDR output buffer make sure there is a hardware handshaking wire, or make sure that the PABX serial port output is configured for XON/XOFF. For more details see

For more information about serial ports and cabling see http://en.wikipedia.org/wiki/Serial_port and http://en.wikipedia.org/wiki/RS_232.

A second problem is that on older Windows NT 4.0 systems NTDETECT will probe the serial ports on boot-up to detect any serial mice. This can cause problems with data being lost. See http://support.microsoft.com/kb/131976. From 2.12.0 onwards MonTel Servers are compatible only with Windows 2000 onwards.