Re: mgetty & external sportster
On thing you might want to set if it isn't already is AT&B1. This tells the modem to use a fixed serial rate, not one that's adjustable based on connection. Since you
showed that mgetty was able to communicate with the modem for setting it up it's a little weird that when rings come in it gets that garbage. Oh, the [0d] [0a] are CR and
LF, respectively. BTW, why are you setting the port speed to 38400? Why not just set to 115200?
aphro wrote:
> I have an internal modem(not sure what brand) that works fine, but i want
> to switch to an external incase the modem needs a hard reset we dont have
> to shut the machine down.
>
> Its been sooo many years since i used an external modem so im kinda rusty.
>
> sofar, i got it to communicate with the sportster (both minicom and
> mgetty) i can get minicom to establish a terminal connection and transfer
> a file(by connecting with another computer and hitting 'ATA' when i saw
> the 'RING') the file transferred fine so i assume the modem is good. but
> when mgetty tries to answer i get this:
>
> 01/03 10:50:45 yS0 waiting for line to clear (VTIME), read: [0d][0a]
> 01/03 10:50:46 yS0 removing lock file
> 01/03 10:50:46 yS0 waiting...
> 01/03 10:50:46 yS0 select returned 1
> 01/03 10:50:46 yS0 checking lockfiles, locking the line
> 01/03 10:50:46 yS0 makelock(ttyS0) called
> 01/03 10:50:46 yS0 do_makelock: lock='/var/lock/LCK..ttyS0'
> 01/03 10:50:46 yS0 lock made
> 01/03 10:50:46 yS0 wfr: waiting for ``RING''
> 01/03 10:50:46 yS0
> got: x[fe][00][80]x[00][ff][80][80][f8]x[e0][80][80][80][f8][00]x[fe][00][80]x[00][ff]x[fe][00][80]x[00][ff][80][80][f8]x[e0][80][80][80][f8][00]x[fe][00][80]x[00][ff]
> 01/03 10:50:56 yS0 mdm_read_byte: read returned -1: Interrupted system
> call
> 01/03 10:50:56 yS0 wfr: timeout waiting for RING
> 01/03 10:50:56 yS0 wfr: rc=-1, drn=0
> 01/03 10:50:56 yS0 huh? Junk on the line?
> 01/03 10:50:56 yS0 removing lock file
>
> and mgetty clearly can communicate with the modem :
>
> 01/03 11:33:23 yS0 mgetty: experimental test release 1.1.18-Sep11
> 01/03 11:33:23 yS0 check for lockfiles
> 01/03 11:33:23 yS0 checklock: stat failed, no file
> 01/03 11:33:23 yS0 locking the line
> 01/03 11:33:23 yS0 makelock(ttyS0) called
> 01/03 11:33:23 yS0 do_makelock: lock='/var/lock/LCK..ttyS0'
> 01/03 11:33:23 yS0 lock made
> 01/03 11:33:24 yS0 tio_get_rs232_lines: status: RTS CTS DSR DTR
> 01/03 11:33:24 yS0 lowering DTR to reset Modem
> 01/03 11:33:24 yS0 tss: set speed to 38400 (017)
> 01/03 11:33:24 yS0 tio_set_flow_control( HARD )
> 01/03 11:33:24 yS0 waiting for line to clear (VTIME), read:
> 01/03 11:33:24 yS0 send: ATZ[0d]
> 01/03 11:33:24 yS0 waiting for ``OK''
> 01/03 11:33:24 yS0 got: ATZ[0d]
> 01/03 11:33:24 yS0 CND: ATZ[0d][0a]OK ** found **
> 01/03 11:33:24 yS0 send: [0d]
> 01/03 11:33:24 yS0 waiting for line to clear (VTIME), read: [0d][0a][0d]
> 01/03 11:33:25 yS0 removing lock file
> 01/03 11:33:25 yS0 waiting...
>
> i've been going through documentation on the modem and on the AT command
> set, but so far this is as far as i've gotten. looks like those
> [0d][0a][0d] are escape codes? that could be screwing the modem up. im not
> sure of the modem's model# but it is a 28.8 sportster external, it has a
> bunch of dip switches on it:
>
> 1 On - data terminal ready normal **SET**
> off - data terminal ready override
>
> 2 Up - verbal result codes **SET**
> down - numeric result codes
>
> 3 Up - supress result codes
> down - display result codes **SET**
>
> 4 up - echo offline commands **SET**
> down - no echo, offline commands
>
> 5 up - auto answer on first ring, or higher if specified in NVRAM
> down - auto answer off **SET** (i have tried both ways with same
> results)
>
> 6 up - carrier detect normal **SET**
> down - carrier detect override
>
> 7 up - load NVRAM defaults **SET**
> down - load factory defaults
>
> 8 up - dumb mode
> down - smart mode **SET** (tried both ways, dumb mode the modem does not
> respond at all)
>
> any help would be greatly appreciated!
>
> thanks!@!
>
> nate
>
> ----------------------------------------[mailto:aphro@aphroland.org ]--
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> Firetrail Internet Services Limited http://www.aphroland.org/
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Jens B. Jorgensen
jjorgens@bdsinc.com
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