Compatibility issue with Cisco CUBE during fax switchover

Hi,

During the fax switchover porcess, ITSP (SoftX3000) sends a SIP Re-Invite message with two M lines in SDP contents.

If the otherside is a Cisco CUBE Router it will fail processing it and sends back a BYE message to ITSP! Cisco says it will accept two M lines SDP contents in following condition:

_____________________________________________________________

if a provider sends an SDP with two m-lines, the call goes through as expected.

Here is an example of an accepted m-line format:

m=audio
m=image

However, if a provider sends an SDP with the m-line format reversed, the CUBE does not process it correctly and sends a malformed SDP to the fax server in the Invite message. Therefore, all calls fail.

Here is an example of an unaccepted m-line format:

m=image
m=audio

_____________________________________________________________

Here is my question,

Is there anyway to force SoftX3000 to only send the Re-Invite in Cisco acceptable format?

Thanks,
Seena