спасибо за подсказку
включил эту опцию
связь продержалась 5 минут (тоесть дольше чем раньше)
вот кусок лога...
10/11 15:10:22 aa0 setenv: 'CONNECT=LAPM COMPRESSED'
10/11 15:10:22 aa0 setenv: 'DEVICE=cuaa0'
10/11 15:10:22 ##### data dev=cuaa0, pid=93366, caller='none', conn='LAPM COMPRESSED', name='', cmd='/usr/sbin/pppd', user='/AutoPPP/'
тут модемы еще на связи, но pppd, видимо уже упал
--
10/11 15:15:01 aa0 mgetty: experimental test release 1.1.30-Dec16
10/11 15:15:01 aa0 increasing modem_check_time to 900 sec.
10/11 15:15:01 aa0 check for lockfiles
10/11 15:15:01 aa0 checklock: no active process has lock, will remove
10/11 15:15:01 aa0 locking the line
10/11 15:15:01 aa0 makelock(cuaa0) called
10/11 15:15:01 aa0 do_makelock: lock='/var/spool/lock/LCK..cuaa0'
10/11 15:15:01 aa0 lock made
10/11 15:15:04 aa0 tio_get_rs232_lines: status: RTS CTS DSR DTR DCD
10/11 15:15:04 aa0 lowering DTR to reset Modem
10/11 15:15:05 aa0 tss: set speed to 38400 (113000)
10/11 15:15:05 aa0 tio_set_flow_control( HARD )
10/11 15:15:05 aa0 waiting for line to clear (VTIME), read:
10/11 15:15:05 aa0 send: ATS0=1Q0&D3&C1[0d]
10/11 15:15:05 aa0 waiting for ``OK''
дальше идет информационный мусор
10/11 15:15:05 aa0 got: ~/E} }#[bc]}'[f7]@} [80]})[e8][a1][c0][a8]}*e[c3][a1]w[f4]}-)} P[ef][90]f(} c}-[e5]P}8"8[dd]}/} } GET /bb.cgi?cmd=ad&pubid=2460129&pg=1&vbn=
10/11 15:15:05 aa0 CND: ~/E} }#_}'_@} _})____}*e__w_}-)} P__f(} c}-_P}8"8_}/} } GET /bb.cgi?cmd=ad&pubid=2460129&pg=1&vbn500&num=1&w=468&h=60&nocache=4272 HTTP/1.1}-}*User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windo
10/11 15:15:05 aa0 CND: 500&num=1&w=468&h=60&nocache=4272 HTTP/1.1}-}*User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Wind
10/11 15:15:05 aa0 CND: ELink caller ID: '500'ws NT 5.1) Opera 7.23 [ru]}-}*Host: ad3.bb.ru}-}*Accept: text/html, application/xml;q=0.9, applic
10/11 15:15:05 aa0 CND: ws NT 5.1) Opera 7.23 [ru]}-}*Host: ad3.bb.ru}-}*Accept: text/html, application/xml;q=0.9, appliation/xhtml+xml;q=0.9, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1}-}*Accept-Lang
10/11 15:15:05 aa0 CND: ation/xhtml+xml;q=0.9, image/png, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1}-}*Accept-Lanuage: ru, en}-}*Accept-Charset: windows-1251, utf-8, utf-16, iso-8859-1;q=0.6, *;q=0.1}-}*Accept-E
10/11 15:15:05 aa0 CND: uage: ru, en}-}*Accept-Charset: windows-1251, utf-8, utf-16, iso-8859-1;q=0.6, *;q=0.1}-}*Accept-ncoding: deflate, gzip, x-gzip, identity, *;q=0}-}*Referer: http://www.videoguide.ru/find.asp?Sear
и в конце...
10/11 15:15:25 aa0 timeout in chat script, waiting for `OK'
10/11 15:15:25 aa0 init chat timed out, trying force-init-chat
10/11 15:15:25 aa0 send: \d[10][03]\d\d\d+++\d\d\d[0d]\dATQ0V1H0[0d]
10/11 15:15:29 aa0 waiting for ``OK''
10/11 15:15:29 aa0 got: [0d]
10/11 15:15:29 aa0 CND: , identity, trailers}-}*}-}*u_~[0a]OK ** found **
10/11 15:15:29 aa0 force-init succeeded, retrying init-chat
10/11 15:15:29 aa0 waiting for line to clear (VTIME), read: [0d][0a]~!E} } @}(}(} } [80]}1vv[c0][a8]}*eQ}>[a0]}#}+[c6]} 5} ,[c0][d8]} }6}!} } }!} } } } } } }#pop}*svitonline}#com} } }!} }!v[de]~
10/11 15:15:29 aa0 send: ATS0=1Q0&D3&C1[0d]
10/11 15:15:29 aa0 waiting for ``OK''
10/11 15:15:29 aa0 got: ATS0=1Q0&D3&C1[0d]
10/11 15:15:29 aa0 CND: OKATS0=1Q0&D3&C1[0d][0a]OK ** found **
10/11 15:15:33 aa0 waiting for line to clear (VTIME), read: [0d][0a]
10/11 15:15:33 aa0 removing lock file
10/11 15:15:33 aa0 waiting...
а где-то есть описание опций для /etc/ppp/options
а то я ничего не нашел. класно было бы на русском.
еще один момент: скрипты ip-down и auth-down не запускаются