Hi -
I'm trying to find out what how to connect audio to an  RE Technology RE662 encoder or RE663 decoder  - the manufacturer seems to have gone out of business.  Any ideas what standard the ISDN inverse muxing/bonding conforms to?  I can connect with another Musicam codec as a single 64kb/s clear B channel, but would like to get better quality using two or more B channels.  So, is it H.221 or J.52 or IEC13871 or something proprietary?

Best regards
Chris