I actually agree with TomTom for some of that.
Here's how I'd lay it out.
+-------------+
|Cable Port | +----------------+
|-------------| | Wireless |
| | | Access |
|+---+ | | Point |
|| + | | | |
++-|-+--------+ | |
| ^---------------------------+ |
++-|-+----|-------------------+ | |
|| v |WAN | | +----------------+
|+---+ | |
|+---+ +-|-+ +---+ +---+ |
|| + | | + | | 3 | | 4 | LAN |
++-|-+--+---+-+---+-+---+-----+
|
+--|--------------------------+
|8/|6 port Gigabit Switch |
| | |
| | |
|+-|-+ +---+ +---+ +---+ +---+|
|| v | | 2 | | 3 | | 4 | | n ||
++---+-+---+-+---+-+---+-+---++
Always try to have separate devices for router, switch and access point. The reasoning behind this is it makes it easier to swap out a failing device, for less cost than replacing the entire integrated device.
You can also swap in a bigger switch, or multiple APs more elegantly.
For the wireless AP, I'd be looking at the Ubiquiti Unifi Pro AP which does dualband 2.4 and 5Ghz. For the switch, pick a fanless Gigabit number from HP Procurve.
For the router/firewall/NAT box, you could use any one of a number of devices. I'm assuming that your cable company provide you with a cable modem which converts the coaxial cable to ethernet (with all that magic in between).
If they didn't, you'd be left with a far more restricted option set, basically down to a Cisco 1941 router with their DOCSIS cable card in.
As you're just looking for a solid router to do DHCP, NAT and any other sane network magic, you're actually looking for some sensible devices. You could use a TP-Link box running Gargoyle (very nice DDWRT clone). You could spend a bit more and go for a Cisco 5505 ASA firewall. You could go with my original (albeit humourous suggestion of something from the Juniper range, probably the SRX100.
It all depends on how much shiny you want.
Do you mean RJ45 for the VoIP phone? – Tom O'Connor – 2012-11-17T10:17:38.360
No, i mean i need to connect the "analog" phone (so, i need a router with VoIP inside, smth like Linksys PAP2T had). But, probably, you're right and it's time to move to the "real" VoIP phone which requires, of course, RJ-45 – gakhov – 2012-11-17T10:23:12.960
I'd ditch the ATA route, as if you're looking for a router with "VoIP built in" then you're limiting your choices. Just grab a Linksys SPA 948 off ebay, and move to real voip. – Tom O'Connor – 2012-11-17T10:28:32.110
Agree, changed to VoIP with RJ-45 support. – gakhov – 2012-11-17T10:33:03.530
What kind of budget do you have? – Tom O'Connor – 2012-11-17T12:00:10.537
I think about smth less then 300-400 EUR – gakhov – 2012-11-17T13:28:38.567