Unregistration Issue with Grandstream SIP Endpoints IP Phones

Unregistration issue in Grandstream Endpoints with IP PBX UCM63XX

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Unregistration Issue with Grandstream SIP Endpoints IP Phones

Description

This article describes the recommended settings in Grandstream IP Phones to avoid un-registration issues due to unstable network connectivity.

Recommendations

  1. Network Settings > Advanced Settings > DNS Refresh Timer (m): 5 or 30
  2. Account > SIP Settings > Registration Retry Wait Time: 1
  3. Account > General Settings > DNS Mode: SRV
  4. Account > General Settings > DNS SRV Failover Mode: Use saved one until no response
Figure 1 suggests the Network Settings in Grandstream IP Phones