[Asterisk-Users] Quintum Tenor AX 24 Port SIP FXS "Unsupported Media Type"

[Steve Totaro]

Has anyone worked with one of these boxes and Asterisk? 
 
I have the Tenor AX registering 24 extensions just fine with asterisk
but when I try to call one of the configured FXS extensions on the Tenor
AX, I get "Got SIP response 415 "Unsupported Media Type" back from
xx.xx.xx.xx.
 
I have tried various codecs and get the same.  
 
I am not having  much luck on google, the Quintum manual nor voip-info.
Maybe someone here has a quick answer?
 
Thanks,
Steve Totaro