NAME

rv − Racal/Vadic ACU interface

DESCRIPTION

The racal/vadic ACU interface is provided by the files /dev/cua[01] which is a multiplexed file, and by the daemon dnd which monitors the file, simulating a standard DN dialer.  To place an outgoing call one forks a sub-process trying to open /dev/cul?  and then opens the corresponding file /dev/cua?  file and writes a number on it.  The daemon translates the call to proper format for the Racal/Vadic interface, and monitors the progress of the call recording accounting information for later use. 

The codes for the phone numbers are the same as in the DN interface:

0-9 dial 0-9

: dial \(**

; dial #

− delay for second dial tone

< end-of-number

The entire telephone number must be presented in a single write system call. 

It is require that an end-of-number code be given. 

FILES

/dev/cua0virtual dialer for 300 baud dialout
/dev/cua1virtual dialer for 1200 baud dialout
/dev/cul0the terminal which is connected to the 300 baud dialout
/dev/cul1the terminal which is connected to the 1200 baud dialout
/usr/adm/dnacctAccounting records for sucessfully completed calls. 

SEE ALSO

cu(1), uucp(1)

BUGS

Locking problems. 

The multiplexor seems to have rare-case bugs which occasinally crash the system taking trap type 9’s, usually in the sdata system routine. 

August 03, 1983