serial modem

kalin m kalin at
Tue Jun 30 03:14:21 UTC 2009

> I've no experience with serial modems, but having read the man pages I 
> believe your remote(5) line is incorrect.
> sio0|com1:dv=/dev/cuad0:br#115200:pa=none:
> sets system names sio0 and com1, then you try to execute tip to 
> connect to cuad0. Is there an entry for cuad0 in your /etc/remote? I'm 
> confused as to why tip is returning 'unknown host tip0' however.
> Give `tip -v sio0` a shot, or change the system names in your 
> /etc/remote line

yes the entry was wrong...   changed it. when i try to use tip i get 
device busy. when i use cu it says connected but nothing else happens 
and i don't see any prompts. it's like frozen. i can't type any AT 
commands... nothing. i changed the baud rate around. all the way down to 
9600. so now the same thing happens with tip. if used tip says connected 
but i can not issue any commands...

the modem has 2 leds. one yellow and one green. according to the manual 
the yellow should be blinking as follows:

Fast Blinking (0.5 sec on/0.5 sec off)  Net search/ Not 
registered/Turning Off
Slow Blinking (0.3 sec on/ 2.7 sec off)  Registered, Full Service

i think i'm only seeing 'Fast Blinking'.....  i wonder what 'Net search' 
really means and where it's searching for it. it's connected through a 
RS-232 to the serial port...



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