Technical

For programmers’ information, the Ethernet Card TCP/IP mode responds only to arp packets and to TCP/IP connections made to socket number 0x0203 and the ftp socket. You must use lpr protocol to send data to socket 0x0203. Also, connection attempts to other sockets will meet with no response.

Instead of lpr, which may strip control characters, (use - 1 to avoid this), ftp may be used to print. Enter ftp, then open the Ethernet Card by entering its host name (for example, “open Allison”). A file may be printed simply by sending it (“send filename”). You can use console commands or Scripts to automate this process, and create ftp spool queues.

Filters for ftp and lpr

Both ftp and lpr have output filters which are capable of:

0translating a UNIX line-end to a normal line-end by inserting a carriage return code

0sending a form feed code at the end of a file in order to eject a page.

The means of invoking these filters differ between ftp and lpr as follows:

As a default, ftp runs with binary file transfer. This may be changed to ASCII file transfer by simply entering the command “ASCII” on the ftp command line. When in ASCII mode, the Ethernet Card will convert incoming UNIX line-ends to include a carriage return. To change back to BINARY mode, enter the command “BINARY” on the ftp command line.

5-6 using UNIX