The proposed expiry time of the registration in seconds for line x. Upon expiration of the registration, the phone will send a fresh re-registration request....
Under heading 'Setup' → Identity 1 → "SIP" tab → 'Proposed Expiry'
N/A
| Parameter | Valid value |
|---|---|
| <user_expiry idx="INDEX" perm="PERMISSIONFLAG">VALIDVALUE</user_expiry> | any value |
Please consider that the phone will ignore any expiry received from the registrar with value less than 15 seconds. In such case the phone will take as expiry value 600 seconds instead