Setting Up5-539161-A2-GH30-30 April 1998Table 5-10. Communication Port Options (2 of 5)Port TypePossible Settings: Asynchronous, SynchronousDefault Setting: AsynchronousSpecifies whether the port transmits synchronous or asynchronous data.Asynchronous – The port uses asynchronous communication.Synchronous – The port uses synchronous communication. Synchronous is only validwhen Port Use is set to Net Link.Clock SourcePossible Settings: Internal, ExternalDefault Setting: InternalSpecifies whether the port uses internal or external clocking when the COM port is setfor synchronous transmission. For synchronous operation, the COM port is alwaysdefined as a DCE. This configuration option reverses the direction of the clock (TXC,and RXC) interchange circuits and allows the COM port to accept clocking from anexternal device.Connection to another DCE requires the use of a crossover cable. Clock Source does not appear if Port Type is set to Asynchronous.Internal – The COM port uses internal clocking.External – The COM port uses external clocking.Data Rate (Kbps)Possible Settings: 9.6, 14.4, 19.2, 28.8, 38.4, 57.6, 115.2Default Setting: 19.2Specifies the bits per second rate for the COM port. Data Rate (Kbps) does not appear if:– Port Type is set to Synchronous and,– Clock Source is set to External.9.6 – Sets the COM port rate to 9600 bps.14.4 – Sets the COM port rate to 14,400 bps.19.2 – Sets the COM port rate to 19,200 bps.28.8 – Sets the COM port rate to 28,800 bps. (Running above 28.8 may cause problemson older PCs.)38.4 – Sets the COM port rate to 38,400 bps.CAUTION: The following speeds (57.6 and 115.2 Kbps) are intended to be used forFTP file transfers only. If you configure one of these rates, be sure touse the standard 14′ COM port cable or an equivalent short, lowcapacitance cable.57.6 – Sets the COM port rate to 57,600 bps.115.2 – Sets the COM port rate to 115,200 bps.
