Date: Fri, 6 Jun 2008 10:01:17 -0400 From: "Bob McConnell" <rvm@CBORD.com> To: "Mark Stosberg" <mark@summersault.com>, <freebsd-questions@freebsd.org> Subject: RE: outbound serial modem now times out or drops connection Message-ID: <FF8482A96323694490C194BABEAC24A002D46FFC@Email.cbord.com> In-Reply-To: <1212760486.29520.22.camel@localhost> References: <1212760486.29520.22.camel@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
Mark Stosberg: >=20 > We are using qpage to dial a remote TAP modem (Sprint and Verizon), so > we can send pages about our hosting infrastructure without using the > internet connection.=20 >=20 > Recently it started failing consistently with "timeout to connect". > I first suspected the remote modem (Sprint), but found I got the same > result with other carriers. (And Sprint denied a problem on their end).=20 >=20 > I have since tried a whole battery of approaches including having the > phone line checked by the local phone company, trying a different modem > and trying a different phone cord.=20 >=20 > Trying a new modem (US Robotics external 56k serial modem) did help > slightly. With it, we consistently connnect, but then after a short > pause the connection is dropped. This is easily reproduced in > "minicom": (Using the Sprint TAP modem number here).=20 >=20 > ATDT18886561727 > CONNECT 31200/ARQ/V34/LAPM/V42BIS > =20 > NO CARRIER=20 >=20 > I'm out of ideas here. This phone line is only used for this outbound > service, although our alarm system also uses it for outbound alerts.=20 >=20 > Any suggestions for possible causes or further troubleshooting > approaches are appreciated.=20 Does that modem support Unimodem Diagnostics? What do you get from a '#UD' command right after the failed connection attempt? Bob McConnell
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?FF8482A96323694490C194BABEAC24A002D46FFC>