From owner-freebsd-questions@FreeBSD.ORG Fri Jun 6 14:02:19 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7F93E1065678 for ; Fri, 6 Jun 2008 14:02:19 +0000 (UTC) (envelope-from rvm@CBORD.com) Received: from smssmtp.cbord.com (mx1.cbord.com [24.39.174.11]) by mx1.freebsd.org (Postfix) with ESMTP id 467F48FC1B for ; Fri, 6 Jun 2008 14:02:18 +0000 (UTC) (envelope-from rvm@CBORD.com) X-AuditID: ac1f0165-0000134000000330-82-48494330526e Received: from Email.cbord.com ([10.1.1.100]) by smssmtp.cbord.com with Microsoft SMTPSVC(6.0.3790.1830); Fri, 6 Jun 2008 10:01:20 -0400 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Fri, 6 Jun 2008 10:01:17 -0400 Message-ID: In-Reply-To: <1212760486.29520.22.camel@localhost> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: outbound serial modem now times out or drops connection Thread-Index: AcjH3N+7KZZ7A2c2SIGOlv32TyB93AAAJHcg References: <1212760486.29520.22.camel@localhost> From: "Bob McConnell" To: "Mark Stosberg" , X-Brightmail-Tracker: AAAAAA== Cc: Subject: RE: outbound serial modem now times out or drops connection X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Jun 2008 14:02:19 -0000 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