New asterisk 1.7 install and cisco spa 504g phones


I have an asterisk new installation ans two cisco spa 504g phones. I´m going to purchased more ip phones and a isdn epygi Four device.

Four isdn lines connected to this device and then lan to the asterisk pbx.No ip voice with the external world, only ip with 10… 12 ip lan connected phones.

I´m so newbie and the voip companies here are very bad. Phones arrived today and spent all day configuring the phones in order to stablish a lan phone call between 2 of them…no success.

I need this:

-Four isdn lines, with a IVR… presh 1 for… 2 for… etc. Internall call system for those 12 phones…internal extensions. Also, when a internal phone needs to phone outside select the line or the system selects a free line from those 4 isdn.

Right now I only have 2 phones and asterisk pbx… waiting for more phones and epygi device. Some docs talk about sip.conf and more *.conf file… where are they? if I launch a locate sip.conf command there are some paths. which is the correct one?

Better using cli vs freepbx? or another better frontend?

any idea?

cisco phones have a loooot of parameter to configure!!!

Usin asterisk 1.7 and freepbx 2.8.