Here are some quick notes on how to set up/use chan_fax.  These are
based upon conversations on IRC with anthm.  I haven't yet tested a
full setup (I don't have Hylafax set up).

1) Get chan_fax compiled and installed.

	* chan_fax requires SpanDSP and libtiff

2) Create the config file /etc/callweaver/chan_fax.conf based on the sample in
   configs/chan_fax.conf.sample

3) Add to inittab:

fax0:234:respawn:/usr/sbin/faxgetty /dev/FAX0
    .
    .
faxN:234:respawn:/usr/sbin/faxgetty /dev/FAXN

4) Create /var/spool/fax/etc/config.FAX<N> (N is 0 .. number of modems configured in chan_fax).

Sample config file:

CountryCode:1
AreaCode:800
FAXNumber:+1.800.555.1212
LongDistancePrefix:1
InternationalPrefix:011
DialStringRules:etc/dialrules
TracingMask:            0x11
#ServerTracing:1
ServerTracing: 0xDFFFF
SessionTracing:0xFFF
RecvFileMode:0600
LogFileMode:0600
DeviceMode:0600
RingsBeforeAnswer:0
SpeakerVolume:off
GettyArgs:"-h %l dx_%s"
LocalIdentifier:"chan_fax"
TagLineFont:etc/lutRS18.pcf
TagLineFormat:"From %%l|%c|Page %%P of %%T"
MaxRecvPages:100
#
#
# Modem-related stuff: should reflect modem command interface
# and hardware connection/cabling (e.g. flow control).
#
ModemType:Class1# use this to supply a hint

Class1TMConnectDelay:400# counteract quick CONNECT response
#Class1RMQueryCmd:       "!24,48,72,96"  # V.17 fast-train recv doesn't work well

CallIDPattern:          "NMBR="
CallIDPattern:          "NAME="
CallIDPattern:          "NDID="
CallIDAnswerLength:4
# Uncomment these if you really want them, but you probably don't.
CallIDPattern:          "DATE="
CallIDPattern:          "TIME="

5) Common problems

- if faxgetty does not answer your calls change RingsBeforeAnswer from 0 to 1
- T38 is not supported by chan_fax please use RxFax()

6) Dialplan example

[faxserver]

exten => s,1,NoOp(Entering Fax Server)
exten => s,n,Set(CDR(userfield)=INCOMING FAX)
exten => s,n,Dial(FAX/${CALLERID(num)},30,r)
exten => s,n,Hangup

exten => h,1,System(/usr/local/bin/new-fax-received.sh "${STRFTIME(${EPOCH},,%Y%m%d-%H%M%S)}" "${CALLERID(num)}" )
exten => h,2,Hangup