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How to write Test Case for telephone ?

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How to write Test Case for telephone ?


Answer1:
Test cases for telephone
test the "functionality" of telephone,
1. Test for presence of dial tone.
2. Dial Local number and check that receiver phone(dialled no.) rings.
3. Dial any STD number and check that intended phone number rings.
4. Dial the number of "under test" phone and check that it rings.
5. When ringing, pick it up and check that ringing stops.
6. When talking - then there should be no noise or disturbance.
7. Check that "redial" works properly.
8. Check STD lock facility works.
9. Check speed dialing facility.
10. Check for call waiting facility.
11. Check that only the caller can disconnect the call.
12. If "telephone Under test" is engaged with any caller and at this time if a third caller attempts to call the "telephone under test" then call between two other parties should not get disconnected.
13. If "telephone Under test" is engaged with any caller and at this time if a third caller attempts to call the "telephone under test" then third caller will listen to engage tone or message from exchange.
14. Check for volume(increase or decrease) of the handset.
15. Keep the hand set down from base unit and attempt to call the "telephone under test" then it should not ring.
16. Check for call transfer facility.
test the 'telephone itself
1. Check for extreme temparatures (hot and cold)
2. Check for different atmospheric conditions (humidity etc..)
3. Check for exterme power conditions
4. Check for button durability
5. Check for body strength
etc...


Answer2:
My company designs and build phone system software, so I am very familiar with phone testing. You could be dealing with an IVR system that has menu-driven logic, or you could be dealing with an auto-attendant with directory features. The basic idea is that you need to be able to define your expected results, and record your actual results. The medium is different, but the same basic concepts apply. In some ways the phone is easier becuase it can be a more linear process than say, a web system

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