Patton electronic SmartNode 4110 Series manual Configuring the active clock edge

SmartWare Software Configuration Guide 14 • Serial port configuration

Before using the serial interface the hardware port protocol has to be specified. There are two command options available to select the suitable hardware port protocol:

•v35 for V.35 protocol to be used

•x21 for X.21 protocol to be used

Mode: Administrator execution

Step	Command	Purpose
1	node(cfg)#port serial slot port	Selects the serial interface on slot and port
2	node(prt-ser)[slot/port]#hardware-port {v35 x21}	Sets the hardware port protocol
3	node(prt-ser)[slot/port]#show port serial	Displays the serial interface configuration

Example: Configuring the hardware port protocol

The following example enables X.21 as hardware port protocol for the serial interface on slot 0 and port 0. Check that Hardware Port is set to X.21 in the command output of show port serial.

node(cfg)#port serial 0 0 node(prt-ser)[0/0]#hardware-port x21 node(prt-ser)[0/0]#show port serial

Serial Interface Configuration

------------------------------

Port	:	serial 0 0 0
State	:	CLOSED
Hardware Port	:	X.21
Transmit Edge	:	normal
Port Type	:	DTE
CRC Type	:	CRC-16
Max Frame Length:		2048
Recv Threshold	:	1
Encapsulation	:	framerelay

Configuring the active clock edge

Depending on the system configurations—i.e. when using long cables, with certain modem types or data rates—synchronization problems may occur on the serial port. In these cases, it may be necessary to configure the clock edge on which data is transmitted.

This procedure describes how to set the active clock edge of the serial interface

Mode: Port serial

Step	Command	Purpose
1	node(prt-ser)[slot/port]# transmit-data-	Configures the serial interface to transmit on the
	on-edge positive	positive edge of the clock (normal, default).
2	node(prt-ser)[slot/port]# transmit-data-	Configures the serial interface to transmit on the
	on-edge negative	negative edge of the clock (inverted).

Serial port configuration task list 174