### Subscribe Push Features

The features associated with the Subscribe push type are:

- Sends re-subscription requests when the Push type is Subscribe.
- No user interface is involved, since the subscription service is launched in the background.
- This feature is recommended to build databases of IP telephones.

The telephone provides the following information while subscribing to a particular subscription server:

- User’s Telephone Extension
- IP Address of the telephone
- MAC Address of the telephone
- Set ID, an eight character model number which is fixed and does not change

- For a 9620 IP Telephone, the Set ID is 9620D01A
- For a 9630 IP Telephone, the Set ID is 9630D01A