I am trying to integrate a Symetrix 421 paging to Cisco 2811 router.
Should I use a FXO or FXS port and also doyou have some configuration expamples.
OK, this is what I was afaid of. The problem here is that the Symetrix is not going to have any type of Telephony Interface (from spec sheet nicely supplied by Paolo) so we will need some "mid-span" type device. In the Nortel setup with the XUT set for Paging, when someone dialled 811 the Paging Card would answer and just "Bridge" the Audio over to the Symetrix. All the Smarts so to speak are in the Nortel Paging Card (Ring detection, Audio Cut-through etc) and the Symetrix is just a nice Amp.
Something like this;
Hope this helps!
Edit: Sorry, this would be used with an FXS Port :)