AASTRA 7106a for MX-ONE EN - Manual (Page 22)

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Direct inward system Access - DISA
If you are assigned to use this feature and you are working externally,
you can call your office and get access to an external line in order to
make business calls.
With common authorization code:
1. Lift the handset and call the DISA feature in your office.
2. You receive dial tone, press numeric keys * 7 2 *
3. Dial the authorization code and press numeric key #
4. You receive a dial tone, Dial external number
With individual Authorization code:
1.
Lift the handset and call the DISA feature in your office.
2. You receive dial tone, press numeric keys: * 7 5 *
3. Dial the authorization code and press numeric key *
4. You receive a dial tone, Dial external number, press *
5. Dial your own extension number and press #
6. You receive a dial tone. Dial external number