Snom M400 an Fritzbox

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ukleinek

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Hallo zusammen

Ich versuche ein Snom M400 (+ Mobilteil M30) an einer Fritzbox einzurichten. Mit der passenden Snom Doku kann ich ausgehend Gespräche aufbauen und führen. Aber bei einem eingehenden Anruf klingelt das Mobilteil nicht, und auch der Anrufer hört keinen Freiton.

Im SIP-Log des M400 findet sich bei einem internen Anruf von einem am der Fritzbox angemeldeten Fritzfon folgendes:

Code: 
Received from udp:192.168.140.2:5060 at 03/10/2026 10:36:29  (1033 bytes)

INVITE sip:[email protected];line=1 SIP/2.0
Via: SIP/2.0/UDP 192.168.140.2:5060;branch=z9hG4bK855D78BE5E5DF82F
From: "Familie" <sip:**[email protected]>;tag=9498F2792A2F0F99
To: <sip:[email protected];line=1>
Call-ID: [email protected]
CSeq: 13 INVITE
Contact: <sip:[email protected]>
Max-Forwards: 70
P-Called-Party-ID: <sip:**[email protected]>
Expires: 120
Session-Expires: 600;refresher=uac
Min-SE: 90
User-Agent: AVM FRITZ!Box 6591 Cable (Vodafone) 161.08.25 TAL (Mar 17 2026)
Supported: 100rel,replaces,timer,199
Allow-Events: telephone-event,refer
Allow: INVITE,ACK,OPTIONS,CANCEL,BYE,UPDATE,PRACK,INFO,SUBSCRIBE,NOTIFY,REFER,MESSAGE,PUBLISH
Content-Type: application/sdp
Accept: application/sdp, multipart/mixed
Accept-Encoding: identity
Content-Length:   196

v=0
o=user 5965069 5965069 IN IP4 192.168.140.2
s=call
c=IN IP4 192.168.140.2
t=0 0
m=audio 7080 RTP/AVP 8 0 101
a=sendrecv
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=rtcp:7081

Sent to udp:192.168.140.2:5060 at 03/10/2026 10:36:29  (271 bytes)

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.140.2:5060;branch=z9hG4bK855D78BE5E5DF82F
From: "Familie" <sip:**[email protected]>;tag=9498F2792A2F0F99
To: <sip:[email protected];line=1>
Call-ID: [email protected]
CSeq: 13 INVITE
Content-Length: 0

IP der Fritzbox: 192.168.140.2
IP des M400: 192.168.140.122

Bei einem Ruf zurück (also vom M30 zum Fritzfon) gibt es ein paar Fehlermeldungen im Log:
Code: 
Sent to udp:192.168.140.2:5060 at 03/10/2026 10:41:42  (569 bytes)

REGISTER sip:192.168.140.2 SIP/2.0
Via: SIP/2.0/UDP 192.168.140.122;rport;branch=z9hG4bKbj60ch3q16187t3g4uqa9hu8
Max-Forwards: 70
From: <sip:[email protected]>;tag=okg2e1kmwd
To: <sip:[email protected]>
Call-ID: hsga9r1lx5hr3bcnspanvpwaae
CSeq: 174151 REGISTER
Contact: <sip:[email protected];line=1>
Allow: INVITE, CANCEL, BYE, ACK, REGISTER, OPTIONS, REFER, SUBSCRIBE, NOTIFY, MESSAGE, INFO, PRACK, UPDATE
Allow-Events: talk,hold
Expires: 3600
User-Agent: snomM400/07.60.0401  (MAC=000413D1A024; SER= 00000; HW=3)
Content-Length: 0


Received from udp:192.168.140.2:5060 at 03/10/2026 10:41:42  (391 bytes)

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.140.122;rport=5060;branch=z9hG4bKbj60ch3q16187t3g4uqa9hu8
From: <sip:[email protected]>;tag=okg2e1kmwd
To: <sip:[email protected]>;tag=44CBA84CBA4E751F
Call-ID: hsga9r1lx5hr3bcnspanvpwaae
CSeq: 174151 REGISTER
WWW-Authenticate: Digest realm="fritz.box", nonce="1552AD373306EE07"
User-Agent: FRITZ!OS
Content-Length: 0


Sent to udp:192.168.140.2:5060 at 03/10/2026 10:41:42  (720 bytes)

REGISTER sip:192.168.140.2 SIP/2.0
Via: SIP/2.0/UDP 192.168.140.122;rport;branch=z9hG4bK41wgybkuyqoftwct
Max-Forwards: 70
From: <sip:[email protected]>;tag=okg2e1kmwd
To: <sip:[email protected]>
Call-ID: hsga9r1lx5hr3bcnspanvpwaae
CSeq: 174152 REGISTER
Contact: <sip:[email protected];line=1>
Allow: INVITE, CANCEL, BYE, ACK, REGISTER, OPTIONS, REFER, SUBSCRIBE, NOTIFY, MESSAGE, INFO, PRACK, UPDATE
Allow-Events: talk,hold
Authorization: Digest username="rezeption", realm="fritz.box", nonce="1552AD373306EE07", uri="sip:192.168.140.2", response="0af91f88cceb2028dde3b5d77060b9ef"
Expires: 3600
User-Agent: snomM400/07.60.0401  (MAC=000413D1A024; SER= 00000; HW=3)
Content-Length: 0


Received from udp:192.168.140.2:5060 at 03/10/2026 10:41:42  (662 bytes)

SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.140.122;rport=5060;branch=z9hG4bK41wgybkuyqoftwct
From: <sip:[email protected]>;tag=okg2e1kmwd
To: <sip:[email protected]>;tag=3A553132C0E304C3
Call-ID: hsga9r1lx5hr3bcnspanvpwaae
CSeq: 174152 REGISTER
Contact: <sip:[email protected];line=1>;expires=300
User-Agent: AVM FRITZ!Box 6591 Cable (Vodafone) 161.08.25 TAL (Mar 17 2026)
Supported: 100rel,replaces,timer,199
Allow-Events: telephone-event,refer,reg
Allow: INVITE,ACK,OPTIONS,CANCEL,BYE,UPDATE,PRACK,INFO,SUBSCRIBE,NOTIFY,REFER,MESSAGE,PUBLISH
Accept: application/sdp, multipart/mixed
Accept-Encoding: identity
Content-Length: 0


Sent to udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (1061 bytes)

INVITE sip:**[email protected];user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.140.122;rport;branch=z9hG4bK.d1osi.32xqtvx4wv6or55czb6
Max-Forwards: 70
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>
Call-ID: [email protected]
CSeq: 1434 INVITE
Contact: <sip:[email protected];line=1>
Allow: INVITE, CANCEL, BYE, ACK, REGISTER, OPTIONS, REFER, SUBSCRIBE, NOTIFY, MESSAGE, INFO, PRACK, UPDATE
Content-Disposition: session
Min-SE: 90
Session-Expires: 3600
Supported: replaces,100rel,timer
User-Agent: snomM400/07.60.0401  (MAC=000413D1A024; SER= 00000; HW=3)
Content-Type: application/sdp
Content-Length: 359

v=0
o=rezeption 1348421699 1348421699 IN IP4 192.168.140.122
s=-
c=IN IP4 192.168.140.122
t=0 0
m=audio 50014 RTP/AVP 0 8 115 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:115 G726-32/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=maxptime:80
a=sendrecv
a=rtcp:50015

Received from udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (417 bytes)

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 192.168.140.122;rport=5060;branch=z9hG4bK.d1osi.32xqtvx4wv6or55czb6
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>;tag=668EAA1674E67B94
Call-ID: [email protected]
CSeq: 1434 INVITE
WWW-Authenticate: Digest realm="fritz.box", nonce="0B52A8CF919F2161"
User-Agent: FRITZ!OS
Content-Length: 0


Sent to udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (428 bytes)

ACK sip:**[email protected];user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.140.122;rport;branch=z9hG4bK.d1osi.32xqtvx4wv6or55czb6
Max-Forwards: 70
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>;tag=668EAA1674E67B94
Call-ID: [email protected]
CSeq: 1434 ACK
User-Agent: snomM400/07.60.0401  (MAC=000413D1A024; SER= 00000; HW=3)
Content-Length: 0


Sent to udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (1232 bytes)

INVITE sip:**[email protected];user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.140.122;rport;branch=z9hG4bK7r6hy3ppxy2.y2gw8p33y
Max-Forwards: 70
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>
Call-ID: [email protected]
CSeq: 1435 INVITE
Contact: <sip:[email protected];line=1>
Allow: INVITE, CANCEL, BYE, ACK, REGISTER, OPTIONS, REFER, SUBSCRIBE, NOTIFY, MESSAGE, INFO, PRACK, UPDATE
Authorization: Digest username="rezeption", realm="fritz.box", nonce="0B52A8CF919F2161", uri="sip:**[email protected];user=phone", response="82cfa0fd3520ff9a7f5aa1e89fa6f011"
Content-Disposition: session
Min-SE: 90
Session-Expires: 3600
Supported: replaces,100rel,timer
User-Agent: snomM400/07.60.0401  (MAC=000413D1A024; SER= 00000; HW=3)
Content-Type: application/sdp
Content-Length: 359

v=0
o=rezeption 1348421699 1348421699 IN IP4 192.168.140.122
s=-
c=IN IP4 192.168.140.122
t=0 0
m=audio 50014 RTP/AVP 0 8 115 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:115 G726-32/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=maxptime:80
a=sendrecv
a=rtcp:50015

Received from udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (370 bytes)

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.140.122;rport=5060;branch=z9hG4bK7r6hy3ppxy2.y2gw8p33y
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>
Call-ID: [email protected]
CSeq: 1435 INVITE
User-Agent: AVM FRITZ!Box 6591 Cable (Vodafone) 161.08.25 TAL (Mar 17 2026)
Content-Length: 0


Received from udp:192.168.140.2:5060 at 03/10/2026 10:41:48  (737 bytes)

SIP/2.0 183 Session Progress
Via: SIP/2.0/UDP 192.168.140.122;rport=5060;branch=z9hG4bK7r6hy3ppxy2.y2gw8p33y
From: "lala" <sip:[email protected]>;tag=97.hue9grq
To: <sip:**[email protected];user=phone>;tag=8959394184F545AE
Call-ID: [email protected]
CSeq: 1435 INVITE
Contact: <sip:[email protected]>
User-Agent: AVM FRITZ!Box 6591 Cable (Vodafone) 161.08.25 TAL (Mar 17 2026)
Content-Type: application/sdp
Content-Length:   239

v=0
o=user 11475601 11475601 IN IP4 192.168.140.2
s=-
c=IN IP4 192.168.140.2
t=0 0
m=audio 7078 RTP/AVP 0 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:7079

Sieht daran jemand, wo das Problem vergraben ist?
 
OK, hat sich glaube ich erledigt. Ich habe einen separaten DNS-Server im Heimnetz, der "fritz.box" auf 212.42.244.122 aufgelöst hat. Wenn ich das auf die 192.168.140.2 umbiege geht es. Komisch, aber gut genug.
 
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