I've done a lot of research but can not find a telephone system which meets the following requirements for a home system:

Handles at least two outside CO lines.

Default upon picking up phone is an available CO line.

Internal station to station calling after dialing 9 (or some other digit) for internal call (home run wiring is present)

[in other words, the reverse of the normal situation where you can dial an internal call upon picking up the handset but must dial 9 for an outside line]

Internal call to ALL phones

Transfer outside calls internally with announce or send direct to extension.

Uses standard analog phones -- no special or proprietary phones needed.

Page to Public Address Speaker (amplifier)

There are some other features which would be nice, but these are the major ones.

The "pick up and automatically get next external line" and having to dial 9 [or other digit] for the internal network" seems impossible to find, as is the ability to use regular phones.

I'm trying to set up a sophisticated home telephone network which looks like normal residential (e.g. uses standard phones) and operates like normal residential (e.g. pick up phone, get outside line) and only special features (e.g. station to station calling) require special keystrokes.

Any system out there meet these requirements?