Помогите повести до ума Диал-Ап сервер

Значит имеется машина на которой крутится Dial-Up сервер, состоящий из двух модемов ttyLT0 и ttySO, mgetty + pppd + radiusclient + freeradius + mysql.
Один модем работает нормально ( ttyLT0 )

Sep 5 21:45:24 isp pppd[3027]: Plugin radius.so loaded.
Sep 5 21:45:24 isp pppd[3027]: RADIUS plugin initialized.
Sep 5 21:45:24 isp pppd[3027]: pppd 2.4.2b3 started by a_ppp, uid 0
Sep 5 21:45:24 isp pppd[3027]: Using interface ppp0
Sep 5 21:45:24 isp pppd[3027]: Connect: ppp0 <--> /dev/ttyLT0
Sep 5 21:45:24 isp /etc/hotplug/net.agent: assuming ppp0 is already up
Sep 5 21:45:27 isp pppd[3027]: PAP peer authentication succeeded for shkolatr
Sep 5 21:45:28 isp pppd[3027]: local IP address 192.168.1.1
Sep 5 21:45:28 isp pppd[3027]: remote IP address 192.168.1.10
Sep 5 21:45:41 isp pppd[3027]: local IP address 192.168.1.1
Sep 5 21:45:41 isp pppd[3027]: remote IP address 192.168.1.10
Sep 5 21:45:43 isp pppd[3027]: local IP address 192.168.1.1
Sep 5 21:45:43 isp pppd[3027]: remote IP address 192.168.1.10
Sep 5 21:50:35 isp pppd[3027]: LCP terminated by peer (6M-=&^[^@<M-Mt^@^@^@^@)
Sep 5 21:50:37 isp pppd[3027]: Hangup (SIGHUP)
Sep 5 21:50:37 isp pppd[3027]: Modem hangup
Sep 5 21:50:37 isp pppd[3027]: Connection terminated.
Sep 5 21:50:37 isp pppd[3027]: Connect time 5.2 minutes.
Sep 5 21:50:37 isp pppd[3027]: Sent 27754 bytes, received 19541 bytes.
Sep 5 21:50:37 isp pppd[3027]: Connect time 5.2 minutes.
Sep 5 21:50:37 isp pppd[3027]: Sent 27754 bytes, received 19541 bytes.
Sep 5 21:50:37 isp pppd[3027]: Exit.

а вот со вторым лажа, принемает звонок, коннект, около минуты висит, и ложит трубку. вот лог..

Sep 5 22:43:41 isp pppd[1792]: Plugin radius.so loaded.
Sep 5 22:43:41 isp pppd[1792]: RADIUS plugin initialized.
Sep 5 22:43:41 isp kernel: CSLIP: code copyright 1989 Regents of the University of California
Sep 5 22:43:41 isp kernel: PPP generic driver version 2.4.2
Sep 5 22:43:41 isp pppd[1792]: pppd 2.4.2b3 started by a_ppp, uid 0
Sep 5 22:43:41 isp pppd[1792]: Using interface ppp0
Sep 5 22:43:41 isp pppd[1792]: Connect: ppp0 <--> /dev/ttyS0
Sep 5 22:43:41 isp /etc/hotplug/net.agent: assuming ppp0 is already up
Sep 5 22:44:11 isp pppd[1792]: LCP: timeout sending Config-Requests
Sep 5 22:44:11 isp pppd[1792]: Connection terminated.
Sep 5 22:44:11 isp pppd[1792]: Exit.

Где зарыты грабли ?? если нужно показать какието логи, конфиги, нет проблемм.
kernel-2.4.20 Alt Linux
Всем спасибо.!!