Mobile Phone call to RMX breaks up

[Anonymous]

hello

we have to RMX2000 (V7.8.0.246) and and DMA7000 (6.0.3_HF1_Build_11)

Folowing situtation:

A call from phone (company internal and external) to the provided dial in number (eg 1122) is working, you will be asked for the conference id after entering it you are in the VMR.

if you do the same thing from your mobile phone, the you will be asked for the conference id. after entering it, the you get the message: network capacity overload and the call on the phone breaks. on the RMX manager you see that the VMR is opened the mobile number is in it. ( it lasts about 2 minutes until the mobile number is kicked out. in this while you are also not able to open it again via others endpoints....

when calling the 1122 then whe have a SIP call from our telephone system to the DMA and then from there to the RMX 

the logfiles tells me, that the call is terminated by RMX 

see here:

USER TERMINATE CONFERENCE
2014 July 21 11:00:30
Terminated By: DMA7000

PARTICIPANT DISCONNECTED
2014 July 21 11:00:30
Participant Name: 555456 Georgia Cloney
Participant ID: 0
Call Disconnection Cause: Disconnected by RMX User
Q931 Disconnection Cause: default cause or not available (0)

any ideas?

if you need more informations depending on software, explaining it.. let me know

thanks 

bastian