new config : status 503 and 483

Hello,

 

i try to setup ACME Net-Net OS VM ECZ7.2.0.

 

ISDN -- GW CUBE -- ACME -- CUCM

 

it's ok for outgoing calls, it's works fine.

 

but for incoming calls , in the web admin , I already have SIP status 503 and  483 :

 

 

detail of status 483 ,

There is no numbers in the FROM and TO headers :

 

2015-02-05 16:20:53.037 
SIP/2.0 483 Too Many Hops
Via: SIP/2.0/UDP 10.76.251.11:5060;branch=z9hG4bK191a969afb45c
From: <sip:10.76.251.11>;tag=145306122
To: <sip:10.76.251.27>;tag=aprqngfrt-csd7ec00000a6
Call-ID: f358a600-4d319865-191a1-bfb4c0a@10.76.251.11

But in the invite they appear:

 

2015-02-05 16:19:23.268 
INVITE sip:63361@10.76.251.55:5060 SIP/2.0
Via: SIP/2.0/UDP 10.76.251.16:5060;branch=z9hG4bK422249
Remote-Party-ID: "001763XXXXX"