I’ve setup an asterisk server at home like that :
Installed centos 5.2 then asterisk on it.
Got a DID from a provider.
Have a cisco 7960 at home which connects to my router so it can reach the asterisk server (which contact then the did provider).
Everything works well considering this very simple setup.
Now, my boss is interested in getting into voip at the office. I’ve read a lot about voip but still, there are many points unclear in my mind, especially about hardware since my setup at home required none.
Here is our current office setup : 15 telephone numbers, all pstn phones, 4 fax dedicated lines and it is not uncommon that 10 persons talk at the same time.
I guess this is not unsual setup but it confuses me a lot!
At home, I have cable connection between my asterisk server and the provider (900k/sec). From what I saw, digital cards are mainly made for T1 lines. So do I really have to use T1 for the office setup or should a 1mb/sec cable line could do it?
I plan about using PCI card for fxo-fxs. I also noticed that adapter exists. What would be the best choice. Is it that pci cards are less expensive when having a lot of pstn to plug?
I can see that there is very few digital pci card with only 1 input. It seems that 2 or even 4 ports is more common. How is that? Is it only to accomodate very large compagnies or am I missing something?
Should we decide to get a T1 for our voice needs, do you have to pay for bandiwth or is is unlimited?
I read that a T1 is 24 pair of copper wires. Does it means that it can accomodate 24 different DID so max 24 person can talk simultaneiously?
As you can see, I’m confused. There is a lot of accurate information about voip on the internet but few for general questions like these.
Can anyone help me pointing me the right direction?