Connection terminated after 481.1 minutes

[Antonio Rodriguez <arodriguez@worldnet.att.net>]

Can someone help me fix this annoying feature? No matter at what time I
connect, after 481.1 minutes I get disconnected. Is it the script, or is
it the AT&T server? Here is my plog:
Jun 29 05:46:17 debian pppd[241]: Modem hangup
Jun 29 05:46:17 debian pppd[241]: Script /etc/ppp/ip-down started (pid
384)
Jun 29 05:46:17 debian pppd[241]: Connection terminated.
Jun 29 05:46:17 debian pppd[241]: Connect time 481.1 minutes.
Jun 29 05:46:17 debian pppd[241]: Sent 8673069 bytes, received 72974652
bytes.
Jun 29 05:46:18 debian pppd[241]: Waiting for 1 child processes...
Jun 29 05:46:18 debian pppd[241]:   script /etc/ppp/ip-down, pid 384
Jun 29 05:46:18 debian pppd[241]: Script /etc/ppp/ip-down finished (pid
384), status = 0x0
Jun 29 05:46:18 debian pppd[241]: Exit.

Thanks,
Antonio.