Re: flexfax: Re: Hylafax & Multitech 5600ZDX

[Glenn Burkhardt <glenn@aoi.ultranet.com>]

> Hi,
> 
> > ModemHardFlowCmd:	AT&K3		# hardware flow control cmd
> > ModemSoftFlowCmd:	AT&K4		# software flow control cmd
> 
> Since I did a lot of the base of this config, I thought I would throw in
> something here that seems to have gone missing.
> 
> Regarding the MT5600ZDX....  according to the manual, the ABOVE flow control
> settings are "supposed" to work.  I had set them that way originally myself.
> But I got a lot of the bad behavior described in this context on BOTH data
> and fax calls.  I had perfected and been using a config for the MT2384ZDX
> (both the 28.8kb and 33.6kb models) and the flow control had been set using
> the syntax:
> 
> ModemFlowControlCmd:    AT&E4&E13       # hardware flow control
> ModemResetCmds:         AT&E1&E15                                             
>
By my reading of the man page for config, 'ModemFlowControlCmd' is not
a supported command.  Don't you want

ModemHardFlowCmd:	AT&E4&E13
ModemSoftFlowCmd:	AT&E5&E13

???

The reset commands just put the modem in auto-reliable mode and enable
data compression - if these are set in NVRAM, it won't matter.  And they
are the as shipped factory default settings.

> Now, the reset line above is included here because I had copied it over
> to my MT5600ZDX entry as well and it was working.  It may really not be
> necessary.  
> 
> The settings above were for HARDWARE flow control on the older MT2834ZDX's
> (from the manual and from working configs).  Now, this is NOT in the manual
> for the MT5600ZDX, *BUT* it was accepted by the modem in faxgetty modem
> initialization.  AND, most important, after commenting out the entries
> listed up top (the &Kx stuff), and putting the above lines in, my MT5600ZDX
> has worked great for fax in/out and data in/out with the port rate set at
> 57600 baud!

My guess is that you got lucky.  The system probably reverted to software
flow control.  You'd really need to check the logs to find out what faxgetty
was doing to initialize the modem, and check the NVRAM settings.

In fact, the latest MT5600ZDX support the old style &E flow control commands,
even though they aren't listed in the manual.  MultiTech started buying
Rockwell chipsets for this modem, which use &K for flow control.  You can
tell that the commands older MultiTech models work by using them and querying
the modem with AT&V:

at&e4&v						  
ACTIVE PROFILE:                                 ***
B1 E1 L1 M0 N1 Q0 T V1 W0 X4 Y0 &C1 &D3 &G0 &J0 &K3 &Q5 &R1 &S0 &T5 &X0 &Y0
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:060 S08:002 S09:006
S10:014 S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138
S48:007 S95:000 

OK
at&e3&v
ACTIVE PROFILE:					***
B1 E1 L1 M0 N1 Q0 T V1 W0 X4 Y0 &C1 &D3 &G0 &J0 &K0 &Q5 &R1 &S0 &T5 &X0 &Y0
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:060 S08:002 S09:006
S10:014 S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138
S48:007 S95:000 

OK
at&e5&v
ACTIVE PROFILE:					***
B1 E1 L1 M0 N1 Q0 T V1 W0 X4 Y0 &C1 &D3 &G0 &J0 &K4 &Q5 &R1 &S0 &T5 &X0 &Y0
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:060 S08:002 S09:006
S10:014 S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000 S38:020 S46:138
S48:007 S95:000 

OK


But my modem doesn't work properly in receive mode without 

ModemFlowControl:       xonxoff

which is consistent with the performance of previous Rockwell chip sets.
I'll try to get around to calling MultiTech support to find out for sure.