Cisco Engineer and elastic pbx

I need to get done small job to configure Cisco 1861 router for fxo and fxs to work with elastic or trixbox open source. Network Designed as GPON 100 and vdsl which is working in redundant fail over in Mikrotik and port forwarding coz dynamic ip. GPON + VDSL MIKROTIK SWITCH 3750G AND two more switches 2960 and cisco phone 7960 its a quick job only configration need to done all network is already and runing engineer need to do 1- Elastix configure 2- cisco 1861 router for FXO AND FXS ports 3- Cisco 7960 Phone to configure to work with elastix Only experience guy who can done it right away Br Fiaz