If set to on, a new sip header Mac is added to the register, and also added to the user-agent.
| Header | Value = On | Value = Off |
|---|---|---|
| User-Agent: | GigasetP85x/10.1.193.12 000413E31F3F | User-Agent: GigasetP85x/10.1.193.12 |
| Mac: | 000413E31F3F |
...
N/A
| Parameter | Valid value |
|---|---|
| <mac_info_in_sip_register idx="INDEX" perm="PERMISSIONFLAG">VALIDVALUE</mac_info_in_sip_register> | On/Off |