3Com S200 manual Parameters, Connection Type, Configuring the PAD Port, Introduction, When

			PAD Port Configuration
Configuring the PAD Port
Introduction
	This section describes the PAD port parameters. Any parameter with an asterisk (*)
	requires a Node boot.
Parameters
	From the PAD port record, you can configure these parameters:
	Connection Type
	Range:	SIMP, DTR, DTRD, DTRP, DIMO, DIMOa, DIMOb, EMRI,
		EMDC, EMCDIO
	Default:	SIMP
	Description:	Specifies the type of control signal handshaking that is required
		before logical connections can be made to this port. See the
		table below for information about when to use a connection
		type.
	Use Connection Type		When...
	SIMP (Simple)		A terminal is wired to the port with a cable that has a
			minimum of conductors (so most control signals are
			missing). Such cabling provides only ground,
			transmit, and receive data. Control signals from the
			port are maintained high. If data restraint by control
			signal is enabled, the CTS lead changes as required.
	DTR		The device connected to the port provides DTR to
			maintain the EIA connection. Remote users calling
			the device through a PAD port know if the device is
			disconnected or powered down, because the call is
			not completed.
	DTRD		DTR signal required. DCD, DSR, CTS drop for 1
			second between calls and then return to idle state.
			During the control signal drop, the port is unable to
			receive calls.
	DTRP		• DTR is passed end-to-end.
			• Port raises CTS and DCD when it raises DSR.
			The port does not monitor RTS.
			• EIA Monitor supports DTRP.
			• DTRP doesn’t support PVC connections.
			• Configure PAD ports as an answer/originate pair
			by selecting auto calling on the originate end.
			• Supports primary handshaking only (DTR/DSR)
			and should not be used with tail circuit modems.

Configuring PAD/ATPAD Ports 7