Serial line is looped back

[cosme]

Serial line is looped back

Hola

Trato de autentificarme con mi ISP con wvdial a través de un modem ttyS0

mi PC usa Debian lenny y mi ISP usa Centos

y me devuelve el siguiente mensaje

Oct 27 17:50:28 pc pppd[17401]: pppd 2.4.4 started by root, uid 0

Oct 27 17:50:28 pc pppd[17401]: Using interface ppp0

Oct 27 17:50:28 pc pppd[17401]: Connect: ppp0 <--> /dev/ttyS0

Oct 27 17:51:20 pc pppd[17401]: Serial line is looped back.

Oct 27 17:51:26 pc pppd[17401]: Connection terminated.

Oct 27 17:51:26 pc pppd[17401]: Modem hangup

Oct 27 17:51:26 pc pppd[17401]: Exit.


Serial line is looped back. que puediera ser????