Connect 61C with Cisco router with Tie

Hello All!

Im newcomer with few amount of knowledge and will be happy to obtain any kind of experience from you guys!!! In proccess of learning PBX. Need only your advise and direction to dig and find solution

Could you please direct me to steps of extensing dial tone from my PBX to Cisco Router. All VoIP logic is setup inside the router and thats not my bussiness. My only goal is to dial tone from the PBX to Router.

What card I need for it and which kind of connection? As I learnt I need probably Tie Analog trunk from the PBX to Cisco? But which kind of card I need to runn tie off of my PBX?

Thanks!