I was wondering if someone would be able to help - we have a requirement to interface Asterisk with an existing analogue PBX via a small number of analogue extensions (4-8 max). It’s important that whatever solution we find supports redirection on the legacy PBX (i.e. recall functionality to instruct the PBX to transfer the call to another extension and clear down the call to Asterisk, leaving the line clear). Obviously this is just for incoming calls from the analogue PBX.
I’ve found a few FXO gateways that look good, but it’s not clear if they will support the recall functionality. I’m guessing that an internal FXO card should support this. DPNSS is out of the question for various reasons - must be FXO only.
Has anyone here come across the same requirement? If so could you let me know what kit you’d recommend? The cheaper the better.
Thanks in advance.