I want to connect an asterisk box to a typical pbx switch. What kind of interface i must use: FXS or FXO?And why? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050208/6c903421/attachment.htm
How do you want Switch to appear to Asterisk. 1. As an extension. Then use an FXS connection to a CO line input. 2. As a CO line. Then use an FXO connection to an Extension output. Regards Dave -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com]On Behalf Of voip-net@go.ro Sent: 09 February 2005 05:25 To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Asterisk connected to pbx I want to connect an asterisk box to a typical pbx switch. What kind of interface i must use: FXS or FXO?And why?
David J Carter wrote:> How do you want Switch to appear to Asterisk. > > 1. As an extension. Then use an FXS connection to a CO line input.The extension interface at the PBX will be supplying battery and dial tone. Therefore, you would want to use the FXO (red) daughter board on your TDM400P card.> > 2. As a CO line. Then use an FXO connection to an Extension output.The trunk interface at the PBX will be receiving battery and dial tone. Therefore, you would want to use the FXS (green) daughter board on your TDM400P. Having said that... If yours is an enterprise application then I would certainly investigate whether to use a T-1 interface between the two systems.