If you hear dial tone, but can't dial out. Please follow below to debug:
Case 1: After dialing, dial tone stop but won't make call: You need enter 10 digits (including area code) or press # to make call.
Case 2: After dialing, dial tone won't go away: For some older model landline phone, the key tone may be too weak or too loud. it requires to adjust "off hook power" to operate:
* If dial tone too loud, lower the "off hook power" by press 72# from your home phone keypad while off hook (should hear an acknowledge tone).
* If dial tone too weak, increase the "off hook power" by press 74# from your home phone keypad while off hook (should hear an acknowledge tone)
