[OpenSIPStack] SoftPhoneInterface - Incoming Call Event not triggered

[Jacob W. <wat...@go...>]

Hi,

I am using the SoftPhoneInterface class as a basis for a softphone
implementation. I am able to register and make calls just fine, but when it
comes to receiving calls, even after having registered with my SIP
provider's server, no event is triggered in the SoftPhoneInterface class
(Event_IncomingCall), and so I am unable to answer a call.

Using Wireshark, however, I see that the INVITE request is being received by
my SIP provider's server, but all that is returned from my end,
automatically, is a "Status: 100 Trying" message, and then nothing else
happens.

Here is my Wireshark protocol:

No.     Time        Source                Destination           Protocol
Info

*Registering*
    264 19.624891   Local.Address.1.35          Remote.Address.90.138
SIP      Request: REGISTER sip:Remote.Address.90.138
    268 19.853526   Remote.Address.90.138        Local.Address.1.35
SIP      Status: 407 Proxy Authentication Required    (1 bindings)
    270 19.895982   Local.Address.1.35          Remote.Address.90.138
SIP      Request: REGISTER sip:Remote.Address.90.138
    271 20.099519   Local.Address.1.35          Remote.Address.90.138
SIP      Request: REGISTER sip:Remote.Address.90.138
    272 20.120145   Remote.Address.90.138        Local.Address.1.35
SIP      Status: 200 OK    (1 bindings)
    273 20.321326   Remote.Address.90.138        Local.Address.1.35
SIP      Status: 200 OK    (1 bindings)

*Making a call - Successful*
   4632 334.556501  Local.Address.1.35          Remote.Address.90.138
SIP/SDP  Request: INVITE sip:Dia...@Re...dress.90.138, with
session description
   4635 334.634657  Local.Address.1.35          Remote.Address.90.138
SIP/SDP  Request: INVITE sip:Dia...@Re...dress.90.138, with
session description
   4639 334.785283  Remote.Address.90.138        Local.Address.1.35
SIP      Status: 100 Trying
   4640 334.801885  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4642 334.866339  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4652 335.302885  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4660 336.302943  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4691 338.348935  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4750 342.363792  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Status: 200 OK, with session description
   4795 345.240244  Local.Address.1.35          Remote.Address.90.138
SIP      Request: ACK sip:Dia...@Re...dress.90.138:5060
   6852 367.034986  Local.Address.1.35          Remote.Address.90.138
SIP      Request: BYE sip:Dia...@Re...dress.90.138:5060
   6859 367.139967  Local.Address.1.35          Remote.Address.90.138
SIP      Request: BYE sip:Dia...@Re...dress.90.138:5060
   6860 367.243944  Remote.Address.90.138        Local.Address.1.35
SIP      Status: 200 OK
   6862 367.346488  Remote.Address.90.138        Local.Address.1.35
SIP      Status: 200 OK

*Receiving a call - "Status: 100 Trying"*
   7104 386.368960  Remote.Address.90.138        Local.Address.1.35
SIP/SDP  Request: INVITE sip:MyN...@Lo...dress.1.35:5060, with session
description
   7105 386.397928  Local.Address.1.35          Remote.Address.90.138
SIP      Status: 100 Trying

*Unregistering*
   7653 425.373636  Local.Address.1.35          Remote.Address.90.138
SIP      Request: REGISTER sip:Remote.Address.90.138    (remove all
bindings)
   7657 425.606269  Remote.Address.90.138        Local.Address.1.35
SIP      Status: 200 OK    (0 bindings)

Any ideas as to why this might be the case would be greatly appreciated.

Thanks!

Best regards,

Jacob