Asterisk : SIP/2.0 404 Not Found

Hello !

I hope you will solve to my problem.
I have two phones : An IP phone Grandstream Budgetone and another analogic with an adaptator analog/num Zyxel.

I configured the different files and Asterisk recognized very well my two phones:

debian*CLI> sip show peers
Name/username Host Dyn Nat ACL Mask Port Status
2345/2345 5060 OK (20 ms)
1234/1234 5060 OK (5 ms)

But when i wanted to establish a communication between them, nothing happens. So, i checked the state of my SIP connexions :

debian*CLI> sip debug

Sip read:
SIP/2.0 200 OK
Via: SIP/2.0/UDP;branch=z9hG4bK44e12d20
From: “asterisk” sip:asterisk@;tag=as65e9a5f2
To: sip:1234@;tag=b554bf116dba9887
Call-ID: 45c13a9b7c649fbd31a14a1d6002e3b5@
CSeq: 102 NOTIFY
User-Agent: Grandstream BT100
Contact: sip:
Content-Length: 0

10 headers, 0 lines
Destroying call '1059616348761f18529fa2500737f112@’

Sip read:
SIP/2.0 404 Not Found
Via: SIP/2.0/UDP;branch=z9hG4bK40cf2427
To: sip:;tag=xIzMxQDMxID
From: “asterisk” sip:asterisk@;tag=as686d330e
Call-ID: 28abe44002bc1eb318d61c224695172f@
Content-Length: 0

7 headers, 0 lines

And, i saw that it does not find the analogic phone with adaptator. I tried a lot of combinaisons but it does not solve to the problem.

I configured the adaptator like an IP phone in sip.conf, is that right ? May be the configuration of the adaptator is not good ? I do not know.

I hope someone will be able to help me.
Thanks very much.