I have just faced problem with erly media in following situation:
We implemented GSM-gateway, which connected to Vici-Asterisk by SIP trunk.
inbound and outbound calls works fine, but when i make manual dial call to the mobile which unavailable or blocked i don't hear information "subscriber unavailable" and hear ringback only.
as i understand early media don't work, because no media before connection.
I have Asterisk 1.6.2.13 installed on other server (not Vicidial) the same Asterisk configuration (sip parametrs, extensions ) - works fine early media plays and i hear "subscriber unavailable"
I have installed and configured ViciBox_Redux.3.1.15 with Asterisk v.1.4.39.2-vici - the same problem - early media don't work.
Could anybody help me resolve this problem !!!!
Thank you, Pavel!