Serial Connections from Computer Ports

Sun Workstations

Use command

cu -l /dev/cua/a

where 'a' is port name, can be 'b' etc.

If does not work, run in debug mode:

cu -d -l /dev/cua/a

Observed problems:

• on wolfram after Solaris 10 Update 3 installation port 'a' returned following:

wolfram:/root> cu -l /dev/cua/a
Connect failed: NO DEVICES AVAILABLE

In debug mode:

wolfram:/root> cu -d -l /dev/cua/a
altconn called
Device Type Direct wanted
Requested Device Type Not Found
getto ret -1
Connect failed: NO DEVICES AVAILABLE
call cleanup(1)
call _mode(0)

Found on web:

The standard uucp configuration files do not have entries for port ttya.
This will cause cu to fail:
   # /usr/bin/cu -l /dev/cua/a
   Connect failed: NO DEVICES AVAILABLE
The debug mode of cu shows the problem:
   # cu -d -l /dev/cua/a
   altconn called
   Device Type Direct wanted <== no "Direct" in /etc/uucp/Devices
   Requested Device Type Not Found
   getto ret -1
   Connect failed: NO DEVICES AVAILABLE
   call cleanup(1)
   call _mode(0)
File /etc/uucp/Devices must have entries (typically at the bottom) for
/dev/cua/a and /dev/cua/b:
   ACU cua/b - Any hayes [not needed]
   Direct cua/b - Any direct
   #
   ACU cua/a - Any hayes
   Direct cua/a - Any direct
The debug mode of cu also shows the missing entry from /etc/uucp/Dialers:
   # cu -d -l /dev/cua/a
   altconn called
   Device Type Direct wanted
   Trying device entry 'cua/a' from '/etc/uucp/Devices'. <== device exists
   Devices file OK
   processdev: calling setdevcfg(cu, Direct)
   fd_mklock: ok
   fixline(5, 9600)
   gdial(direct) called
   direct not found in Dialers file <== no "direct" in /etc/uucp/Dialers
   set interface UNIX
   getto ret -1
   Connect failed: CAN'T ACCESS DEVICE
   call cleanup(1)
   call _mode(0)
File /etc/uucp/Dialers must have a "direct" entry. This is just the
single, uncommented, word "direct" on a line by itself:
   micom "" "" \s\c NAME? \D\r\c GO
   direct 

I added following 2 lines in the end of /etc/uucp/Devices file:

ACU cua/a - Any hayes
Direct cua/a - Any direct

Now command cu -l /dev/cua/a works fine.