Dear Asterisk experts,
My company has an out of date PABX and has to move to a new solution. My boss asked me to propose him some solutions. Among the one I am considering, there is Asterisk…but I still have some questions!
My current config
[ul]* We have access to the PSTN through 3 ISDN BRI lines (6 simultaneous call) but we will probably need few more in a near future.
- We are equipped withg analog and digital phones (especially for the standard operator)
- We have several offices geographically dispersed but interconnected with a 2Mb/S MPLS network. My PABX question only relate to one of the office (but the other could follow …)
- Our LAN is a 100Mbit/s ethernet network. Our switch do not support QoS nor PoE.[/ul]
[ul]* I should get an industrial grade system
- Reducing the communication costs is of course of interest but is not the top priority[/ul]
[ul]#1 To install Asterisk on a server (double core or bi-xeon Dell server with raid 5 SATA disks) with an octoBRI card, with out-call still handled through the ISDN lines
#2 Test the system with softphones, to make sure our LAN can handle it.
#3 If it works, buy some SIP phones and go to step 5
#4 If it doesnt work, invest in a FXS/FXO TDM2400 card with echo cancellation and keep our analog phones
#5 If all works fine, consider routing our calls toward some VoIP providers.[/ul]
And then, my questions
[ul]# Is there any OctoBRI card (or quadBRI) that you would advise ? What about Beronet ones ?
What are the advantages of Echo Cancellation ? What is the impact if not Echo cancelation is included in the BRI card ?
What is the real difference between analog and digital phones ? How a sip phone compare to such phones ? Is there any SIP phone with all the functionalities required for the standard operator (intercept call if necessary, transfer calls …) with all necessary configurable buttons ?
Does a digital phone directly connect to a FXS ?[/ul]
Many thanks for any comments you could bring to these (first?) questions …