.TH zttest 8 "2005-06-25" 
.SH "NAME" 
zttest \(em Test if the zaptel timer provides timely response
.SH "SYNOPSIS" 
.B zttest 
.I [ -v ]

.SH "DESCRIPTION" 
.B zttest
zttest runs a timing test in a loop and prints the result of each loop.
The test is as follows:

It reads 8192 bytes from the zaptel timer device (\fI/dev/zap/pseudo\fR). 
This should take exactly 8000 ms . It uses calls to
.I gettimeofday(2) 
before and after that read to check that indeed exactly 8000ms have passed.

Values of 100% and 99.99% Are normally considered a definite 
.I pass.
Values of 99.98% and 99.97% are probably OK as well.

.SH OPTIONS
.B -v
.RS
Be more verbose: print one line per test.
.RE

.B -c 
.I count
.RS
Run for 
.I count
times instead of running forever.
.RE

.SH FILES
.B /dev/zap/pseudo
.RS
.RE
The device file used to access the zaptel timer.

.SH SEE ALSO 
zttool(8), ztmonitor(8), ztspeed(8), ztcfg(8), asterisk(8). gettimeofday(2)

.SH AUTHOR 

This manual page was written by Tzafrir Cohen <tzafrir.cohen@xorcom.com> 
Permission is granted to copy, distribute and/or modify this document under 
the terms of the GNU General Public License, Version 2 any  
later version published by the Free Software Foundation. 
 
On Debian systems, the complete text of the GNU General Public 
License can be found in /usr/share/common-licenses/GPL.