NEC Univerge SV8100 - Page 224

Issue 1.0 UNIVERGE SV8100
2 - 200 Callback
To test Callback at a single line telephone:
1. Lift the handset.
2. Dial 799.
3. Hang up.
4. When the telephone rings, lift the handset.
 You hear the Hold tone.
5. Hang up.