Serial Interface
Verify that a serial cable is correctly fitted between your computer and the unit. The DB9 connection pins use the standard convention of;
ptf 1220A
Pin 2 Rx (Receive data)
Pin 3 Tx (Transmit data)
Pin 5 Gnd (Ground)
Most computers with a DB9 serial port connector are configured as;
Pin 2 Tx (Transmit data)
Pin 3 Rx (Receive data)
Pin 5 Gnd (Ground)
Therefore, for the computer to connect properly to the instrument, a standard (straight through) cable is necessary. Note that a null modem cable will cross over the Tx and Rx lines, which will not work properly.
The serial interface window is displaying garbage when I type a command, and the commands do not work
The usual cause of this symptom is that the settings of the serial port are incorrect, probably the baud rate. The correct settings are;
Baud rate 57600 (this is the default, but can be changed utilizing menu command A37)
Data Bits 8
Stop Bits 1
Parity None
Handshaking None
Telnet Interface
Before connecting to the Telnet interface it is necessary to set up the unit IP address and Netmask. These can be set by using the Serial Interface and using the menu commands. Typical settings would be; A24 192.168.0.19 (the IP address) and A25 255.255.255.0 (the Netmask). The unit does not support DHCP (Dynamic Host Communications Protocol).
Once the IP address/Netmask has been set up and the unit is connected to a network (or directly to a computer using an Ethernet crossover cable) a hyperterminal (or other telnet interface program) session can be set up using the unit’s network IP address.
HTTP Interface
Before connecting to the HTTP interface it is necessary to set up the unit IP address and Netmask. These can be set by using the Serial Interface and using the menu commands. Typical settings would be; A24 192.168.0.19 (the IP address) and A25 255.255.255.0 (the Netmask). The unit does not support DHCP (Dynamic Host Communications Protocol).
Once the IP address/Netmask has been set up and the unit is connected to a network (or directly to a computer using an Ethernet crossover cable) communications can be established using a standard web browser (e.g. Internet Explorer).
SNMP Interface
The ptf 1220A/1226A unit acts as an SNMP agent, using SNMP v1. The unit’s key parameters can be viewed by an SNMP manager, and a subset of them can be also set by the SNMP manager. In addition, the unit sends “traps” to the predefined SNMP manager address. A trap is initiated when the state of the unit changes (e.g. the pulse input on channel A fails). These traps will be received by the SNMP manager on the Trap Ringer Console. Traps are enabled or disabled by command A41 on the menu.
Before connecting to the SNMP interface it is necessary to set up both the unit IP address and Netmask, and also the SNMP Manager address to which traps are to be sent. These can be set by using the Serial Interface and using the menu commands. Typical settings would be; A24 192.168.0.19 (the IP address) and A25 255.255.255.0 (the Netmask) and A40 192.168.0.20 (the SNMP Manager IP Address). The unit does not support DHCP (Dynamic Host Communications Protocol)
Once the IP address/Netmask has been set up and the unit is connected to a network (or directly to a computer using an Ethernet crossover cable) communications can be established using a standard SNMP manager software package.
