Provided by: hylafax-server_6.0.7-3.1_amd64 
NAME
info - remote device capability database
DESCRIPTION
The info subdirectory in the HylaFAX spooling area holds information about the
capabilities and status of devices that have been called. One file exists for each
device, with the filename created from the remote device's fully-qualified phone number.
Files have a simple ASCII format. Each line is of the form
[&]tag: value
where a tag identifies a capability and a value is either a string, number, or boolean
value. An optional ``&'' at the front of the line indicates that the tag's value is
locked down and should not be updated by the server. This facility is useful for
restricting the capabilities used with a particular machine.
The following items are recorded:
Tag Type Description
calledBefore boolean device has previously answered at this number
dialFailures number count of consecutive failed dial operations
hasV34Trouble boolean there is difficulty sending to this destination with V.34
hasV17Trouble boolean there is difficulty sending to this destination with V.17
lastDialFailure string reason for last failed dial operation
lastSendFailure string reason for last failed send attempt
maxPageWidth number maximum page width in pixels in normal resolution
maxPageLength number maximum page length in millimeters
maxSignallingRate string maximum signalling rate (bits/sec) to use
minScanlineTime string minimum scanline time
pagerMaxMsgLength number length of longest allowed text message
pagerPassword string password string send to service provider
pagerSetupCmds string commands for setting up modem for a specific service provider
pagerTTYParity string parity & # bits configuration for IXO/TAP communication
pageSource string parameter to tell the paging central who we are
pagingProtocol string protocol (IXO or UCP) for this provider
remoteCSI string remote device Called Subscriber Identification
remoteNSF string remote equipment Non-Standard Facilities information
remoteDIS string remote Digital Identification Signal: capabilities
sendFailures number count of consecutive failed send attempts
supportsBatching boolean accepts batching protocol
supportsHighRes boolean accepts 196 line/inch images (obsolete)
supportsVRes number vertical resolution support bitmask
supports2DEncoding boolean accepts Group 3 2D encoding
supportsMMR boolean accepts Group 4 encoding
supportsPostScript boolean accepts Adobe POSTSCRIPT transfer protocol
The HylaFAX scheduler, faxq(8), uses the information stored in this directory when
deciding if a call should be placed and when preparing documents for transmission. If a
remote device's capabilities are known, then document preparation is constrained and/or
optimized according to the capabilities. Otherwise, documents are prepared without regard
for the remote device's capabilities and if a capability mismatch is encountered the
session is terminated and the documents are reformatted using the newly discovered
capabilities.
The calledBefore item is used by faxsend to decide whether or not to redial a phone number
when encountering certain errors. For example, if a dialing command results in a ``NO
CARRIER'' result, then the number will not be retried unless the number has previously
been dialed successfully.
The minScanlineTime item indicates the minimum scanline time parameter used for facsimile
transmissions. Acceptable values are: ``0ms'', ``5ms'', ``10ms/5ms'', ``10ms'',
``20ms/10ms'', ``20ms'', ``40ms/20ms'', and ``40ms''. (Values of the form X/Y mean to use
X for 98 lpi images and Y for 196 lpi images.)
The pagerTTYParity item specifies the communication parameters to use when communicating
with the IXO/TAP service provider. Acceptable values are: ``even'' (7 bits, even parity),
``odd'' (7 bits, odd parity), and ``none'' (8 bits, no parity). If nothing is specified
then ``even'' is used per the standard.
The pagerMaxMsgLength, pagerPassword, and pagerTTYParity items can be setup according to
the requirements of a pager service provider; they typically are locked down so that their
values are not lost during updates.
The pagerSetupCmds can be used to define AT commands for setting up the modem for a
specific service provider. This value overwrites the settings defined in hylafax-
config(5).
The pageSource parameter can be used to tell the paging central who we are. It usually
contains a SMS answerable mobile number. It is only used for the UCP part of sendpage(8).
Note: This parameter should be used from user-land sendpage(1) and will be removed later.
The pagingProtocol defines which protocol, UCP or IXO, should be used to send the message
to the service provider. It defaults to ``ixo''; for UCP set ``ucp''.
NOTES
faxsend, pagesend, and faxq automatically create and update entries in the info directory,
as required.
The data in this directory is simply a cache of remote capabilities and, except for locked
down items, can be safely purged at any time. The faxcron(8) script, for example,
periodically purges unlocked entries in this directory that have not been accessed in 30
days.
When the first batching attempt fails then supportsBatching is set to false. It must be
manually altered in order to re-enable batching to the destination.
Restricting the capabilities used with a particular machine to a value other than those
that are mandatory can cause documents to be sent outside of an acceptable range for the
receiver.
SEE ALSO
faxcron(8), faxq(8), faxsend(8), pagesend(8), hylafax-config(5)
February 10, 1996 HYLAFAX-INFO(5)