[FlexNet] TNC Compatability with 6pack ROM

Thu, 12 Feb 2004 10:18:55 -0600

P.S

Do you have the 6pack PORT speeds in the FlexNet .BAT file matching the
RS-232 speed of the TNC ?   

For MFJ-1270's, max port speed is 9600 unless it has been hacked...

Hack consists of changing OpAmp that is used for RS-232 driver to a faster
version, and jumpering to one stage less on the clock generator counter...

John C Papson, Principal RF Engineer
Telular Corporation
580 Old Willets Path
Hauppauge, NY, USA 11788
Voice: (631) 232-6070 ex213
Fax: (631) 232 6082
Email: [email protected]

> -----Original Message-----
> From:	Peter Fournia [SMTP:[email protected]]
> Sent:	Thursday, February 12, 2004 10:51 AM
> To:	[email protected]; wnypg
> Cc:	Jon Dickason
> Subject:	[FlexNet] TNC  Compatability with 6pack ROM
> 
> Difficulties with late model MFJ TNCs has occurred during our attempt to 
> start a FlexNet node in Rochester, NY.  Only one of four TNC's worked. 
> I am inquiring about modifications to the MFJ-1278 and MFJ-1278B TNC's 
> that will enable them to be used as a FlexNet node controller.  In all 
> cases the TNC's worked with the stock MFJ ROM.  The problem occurs when 
> the 6pack ROM (V3.3g) is installed.  The problem symptoms were 
> consistent using 2 different computers. We have no problem using the 
> MFJ-1274 TNC.
> 
>      1) MFJ-1278 (serial port problem using the FlexNet ROM, "no device 
> present" indicated when using a terminal program, the PTT light remains
> on)
>      2) MFJ-1270C (serial port problem using FlexNet ROM, the DCD light 
> remained on)
> 
> Also, the MFJ-1278B is not compatible because it has a 16 pin ROM but 
> the 6pack ROM is 14 pins.
> 
> Question:
>     Is there something we can do to the MFJ-1270C or MFJ-1278 to make it 
> work using 6pack?
>     What are the TNC models that are successfully being use by your 
> FlexNet node?
>     Do you have 2 TNC's that we may purchase (Tiny-2)
> 
> Peter Fournia, W2SKY
> 
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