I have a pepwave SOHO connected to a fiberoptic modem, at home. My previous router has 2 sockets for RJ11 phoneplugs. The pepwave does not.
Is it possible to connect my phone to the Pepwave router, possibly with a RJ11-to-RJ45 adapter? Or would this, in order to get my phone to work require additional devices/equipment?
What you need is called an ATA which stands for Analog Telephone Adapter. The ATA will need to be configured and provisioned for whatever service you are using.