[asterisk-users] Error: Dropping incompatible voice frame

[Tim Sharp]

Hello,

I get this error message when trying to route an incoming fax from a packet based T1 to an EICON board that is connected to an external fax & voice mail server.  
Voice calls route to this external server with no error.  Both fax and voice calls that come in a channelized T1 also route to this external server with no errors.
I am on 1.2.7.1 

Jul 13 13:19:56 NOTICE[24867]: channel.c:1904 ast_read: Dropping incompatible voice frame on CAPI/PRI1/XXXXXXXXXX-14a of format slin since our native format has changed to ulaw

I did find a reference to something similar in Mantis issue tracker number 0004101.  
I am not technical enough to know if this is the same issue.  Any help to explain what is the problem or how to fix it is greatly appreciated.
Thank you,
Tim