Problem with external tranfer

[memole]

Hello everyone, I have this problem

 

I have 3 hotels, I have connected all through the interior 2 ADSL connections

 

The switchboard has a public IP

 

The problem and IVM

 

call and respond, when I ask to transfer the call to a remote internal transfer rather than no effect

 

This is the log

 

11:38:34 Incoming SIP call

11:38:36 Ringing on Line 196 detected. Waiting until ring number 2.

11:38:36 Memole Inn Sanremo 196 [Answered]

11:38:36 Answering call...

11:38:36 Answered line [7 "*******"] call number [169] cid [389*******] did[196] drn[0 (0ms)]

11:38:36 Play file: C:\Users\riccardo\Documents\File ricevuti\memole.wav

11:38:41 Caller pressed key [1]

11:38:41 Command - Go

11:38:41 Open OGM: memole camere

11:38:41 Play file: C:\Users\riccardo\Documents\File ricevuti\memole-camere.wav

11:38:43 Caller pressed key [7]

11:38:44 Caller pressed key [7]

11:38:45 Caller pressed key [7]

11:38:45 Variable number = 777

11:38:45 Command - Transfer

11:38:45 Voip Blind Transfer To: 777

11:38:45 Play system prompt: Ringing

11:38:45 Transferring sip call to: 777

11:38:45 Call has disconnected

 

11:38:33 Call sip:389******@62.94.71.98 -> 196

11:38:36 Call sip:389******@62.94.71.98 -> 196 answered

11:38:45 Transfer initiated from sip:196@62.94.243.100:5060. Connecting <sip:3893801380@62.94.71.98> with sip:777@62.94.243.100.

11:38:50 Error returned: 400 Bad request

11:39:03 Call sip:389*****@62.94.71.98:5060 connected

11:39:10 Call 389***** -> 777 disconnected

 

Ok very tanks

 

Riccardo