FXO and FXS cards can be used to interface to PBX's, but they are not the recommended way of doing this. This is what E&M interfaces were designed for - and E&M gives you answer and disconnect supervision, which is often not available on PBX ports.
A FXS port provides line power (-48VDC) and ringing singal to the attached device , which is normally a telephone handset. It is similar to a extension port on a PBX.
A FXO port is passive, meaning it expects to see the -48VDC line power coming from an external source. It senses the ring signal and goes off hook and plays a secondary dial tone. It can be compared to a PBC trunk port that interfaces to an exchange line.
You will have to tell us what a "Dot Line" is so we can confirm if FXO or FXS ports will work with one.
1. Introduction Internet security is important with the increasing
attacks that are happening every day. Many internet and browsing
security solutions exist, but some are not very easy to use or maybe the
question is how can I enable them? In this referen...
Cisco Software Manager Server API Guide This document describes the
programmatic interfaces, RESTful APIs, which are supported by Cisco
Software Manager Server (CSM Server). Overview CSM Server supports a set
of finite RESTful APIs. The first step to use ...
If you are using Cisco's new linux-based Cisco Software Manager server,
then you probably want to make sure there is a startup service for
it.I'll assume that you've already installed the CSM server on a
systemd-based linux system. The commands given belo...