[GEKLÄRT] Immer wieder kurzfristig "unauthorized"

Immer wieder findet sich im Log meines SIP Proxies/Registrar servers (IX67) die Meldung:

0d 01:19:59 tSip info recv 63.214.186.6: SIP/2.0 401 Unauthorized
0d 01:19:59 t1 info send sf 192.168.0.125: SIP/2.0 401 Unauthorized
0d 01:19:59 tSip info recv 192.168.0.125: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:19:59 t5 info send sf 63.214.186.6: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:19:59 tSip info recv 63.214.186.6: SIP/2.0 200 OK Authenticated
0d 01:19:59 t1 info send sf 192.168.0.125: SIP/2.0 200 OK Authenticated
0d 01:20:57 tSip info recv 192.168.0.125: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:20:57 t5 info send sf 63.214.186.6: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:20:58 tSip info recv 63.214.186.6: SIP/2.0 401 Unauthorized
0d 01:20:58 t1 info send sf 192.168.0.125: SIP/2.0 401 Unauthorized
0d 01:20:58 tSip info recv 192.168.0.125: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:20:58 t5 info send sf 63.214.186.6: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:20:58 tSip info recv 63.214.186.6: SIP/2.0 200 OK Authenticated
0d 01:20:58 t1 info send sf 192.168.0.125: SIP/2.0 200 OK Authenticated
0d 01:24:53 tSip info recv 192.168.0.125: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:24:53 t5 info send sf 63.214.186.6: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:24:53 tSip info recv 63.214.186.6: SIP/2.0 401 Unauthorized
0d 01:24:53 t1 info send sf 192.168.0.125: SIP/2.0 401 Unauthorized
0d 01:24:53 tSip info recv 192.168.0.125: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:24:53 t5 info send sf 63.214.186.6: REGISTER sip:calamar0.nikotel.com SIP/2.0
0d 01:24:54 tSip info recv 63.214.186.6: SIP/2.0 200 OK Authenticated
0d 01:24:54 t1 info send sf 192.168.0.125: SIP/2.0 200 OK Authenticated

Die IP 192.168.0.125 gehört zu einem SIPURA Adapter.

Verbunden damit, dass ein Anrufer zu diesen Zeiten ein "besetzt" bekommt.

Ah, OK wenn das normal ist.