How many ports required for outbound telephony calls

Suppose that you have your PBX infrastructure and you have OCS 2007 as well, you want to allow outbound/inbound calls from OCS to the external world, so how many port you need.

Well, this depends on the configuration you have, here is the options:

• For E1/T1 connection you don’t need any extra configuration, why, because if you have E1 this is will be an ISDN interface that has 30 channel so you have a 30 calls (outbound/inbound) in total so you might need to recalculate how many calls you do and if you need extra E1s, same applies for T1.
• If you have analog lines, then each analog line can do 1 call at a time, so you might need to recalculate that.
• If you have prima cells, same here as analog lines.
• For faxing (In total) treat is a normal phone call so if you do faxing using your E1, so you have 30 channels, if analog lines same as above.