4.0 General Operation and Special Features
4.9 Diagnostic Interface Control
The diagnostic software built into the Modem supports a special set of commands known as diagnostic port commands. The commands (listed in Table 4-3) are used to configure modems (from either a local or remote location), or to monitor modems for diagnostic purposes. The diagnostic port commands are entered from a computer or terminal keyboard.
NOTE
To configure or otherwise control a remote modem, the data rate must be 9600 bps or higher.
4.9.1DIAGNOSTIC PORT
The Modem’s diagnostic port is an 8-pin RJ-45 connector allowing you to test or configure the Modem from a connected computer or other DTE. The location of the diagnostic connector next to the power connector on the modem’s rear panel is shown in Figure 2-1. The diagnostic connector requires a cable with an RJ-45 modular connector on one end (modem) and a DB25 connector on the other (terminal) end. The pin assignments of this connector are shown below.
Pin Function
1Constellation X output
2Constellation Y output
3Not used
4Ground
5Receive data (output from modem)
6Transmit data (input to modem)
7Not used
8Not used
4.9.2DIAGNOSTIC PORT COMMANDS
The diagnostic software built into the Modem supports the diagnostic port commands listed in Table 4-3. These commands are issued from a computer or other DTE, which must be connected to the modem’s diagnostic port. To communicate with a modem via the diagnostic port, the DTE must be configured for 8-bit character length, no parity, 1 stop bit, and a data rate of 9600 bps.
