Knowledgebase Article
| Knowledgebase > Unified Communications |
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| Why the SIP ACk message is not accepted by SN | |||
| Article Id #: 12 | |||
The reason why the ACK for the 200 Ok from the SmartNode in some cases is not accepted, is due to an invalid branch ID in the via header. This incidence shows a SIP message flow, where 200 OK and ACK are sent back and forth several times. |
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