Hi folks I seted up the asterisk with an active ISDN B1 AVM Card (german vendor) and it works fine, various SIP clients (IP fon snom, xlite under MacOSX) and also incoming and outgoing connectins. Ok. No problem. After that I configured a CP7940G with a MGCP IOS. It's connected to the asterisk too via switch. No NAT deivce between. And of course, I can call out to PSTN and also to one of the SIP clients. No problem. But when I try to call the MGCP fon from a SIP client or from outside, I get this error message. ----------------------<snip>-------------------- *CLI> Jun 20 15:30:20 NOTICE[25423]: chan_mgcp.c:1509 find_subchannel: Gateway '172.16.103.20' (and thus its endpoint 'd001/1') does not exist Jun 20 15:30:20 WARNING[25423]: chan_mgcp.c:3368 mgcp_request: Unable to find MGCP endpoint 'd001/1@172.16.103.20' Jun 20 15:30:20 NOTICE[25423]: app_dial.c:759 dial_exec: Unable to create channel of type 'MGCP' --------------------<snip>------------------------- Otherwise, vice versa it looks good. ----------------------------<snip>--------------------- Sip read: SIP/2.0 180 Ringing Via: SIP/2.0/UDP 172.16.98.52:5060;branch=z9hG4bK0fe6a009 From: "1412" <sip:1412@172.16.98.52>;tag=as2ae905a1 To: <sip:1407@172.16.103.10:5060;line=xo91ds1x>;tag=ycfd6114eu Call-ID: 7916fc9b5a6e3323751554a33603cbb9@172.16.98.52 CSeq: 102 INVITE Contact: <sip:1407@172.16.103.10:5060;line=xo91ds1x> Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO Allow-Events: talk, hold, refer Content-Length: 0 ---------------------<snip>---------------- But I'm wondering why, the number "1412" is the MGCP fon. But it works. And as an additional info, why must I use with the Cisco CP7940 channel d001 and not (like with an IP10s swissvoice...) aaln ? may be someone can explain me. If there are missing infos please let me know best regards & thx in advance mathias