CISCO 2851 Router

[cigalahgroup]

Hello,

        I have Cisco 2851 router with 2 FXS port card which is inherited from another sister company. I would like to use this router in LAB using on analog line and installing CUCME version 8.1.

My question is Can I directly connect the rj11 to FXS port and start  calling ? I dont have any PBX.

Thanks

[Chris Deren · Accepted solution]

You do not need to install anything to make calls on this router as CME is built into IOS, you need to enable it with ‘telephony-service’.  You can then connect analog phones to these FXS ports.

[cigalahgroup]

I precisely mean if I have to call outside using the pstn line ? 

[Oleg Volkov · Accepted solution]

Hi, FXS port is intended for connect analog phone instead FXO which intended for connect PSTN analog line.

But You need PVDM for work with analog telephony 

[Chris Deren]

No, as pointed out you need FXO ports for that, which for 2800 router you can get for few $ on eBay along with PVDM2-8 that you will need.