Hi guys,
I have some Cisco IP phones from this model 7821 SIP, it registered for a seconds and then suddenly change the IP address and registered again for a seconds then repeat this process without stop!
I have around 300 7821 SIP phones and only around 15 pcs has this problem and all of them have the same Frameware:
Phone Type
| Product Type: | Cisco 7821 |
| Device Protocol: | SIP |
Real-time Device Status
| Registration: | Registered with Cisco Unified Communications Manager 10.80.29.4 |
| IPv4 Address: | 10.80.6.124 |
| Active Load ID: | sip78xx.10-1-1SR1-4 |
| Inactive Load ID: | None |
| Download Status: | None |
what could be the issue here?
Thanks for all
