I have a Cisco 4451 router, that is on version Cisco IOS XE Cupertino 17.9.2a we are trying to set up voip however we can not find any of the usual commands like "voice service voip", "dial-peer" and ect. we see the version supports SIP, can someone ...

When doing guestshell enable I am getting:Error: Config DB Appid guestshell: Default (Port 1) is not allowedThe router I am using is is a Cisco ISR 4400 version 17.06.02Show iox-service:IOx service (CAF): runningIOx service (HA): not supposed IOx ser...

 I am unable to connect the routers to the internet. I have the cisco Ip phones 7945s and the 7841s. I have the firmware needed for the phones on my pacstar 447 routers, I have each type of phone in its own folder in my voip folder on the router. I h...

I am new to voip and am struggling.I am trying to downgrade the firmware on my iphone from 12.5 to 11.0 because it is not compatible with my routers. Before I continue keep in mind I will not be connecting to the internet at any point in time during ...