SPA3102 VOIP Service Error: 503 Service Unavailable

VOIP Service Error: 503 Service Unavailable for the SPA3102 can be a result of not allowing enough hang up time.

To solve this problem from occuring you will need to modify a setting inside Voicent Gateway. Open “Voicent Gateway” and select “Setup” -> “Options”.

On that page at the bottom left you will see “Hangup wait for 5 seconds after hanging up the phone in order to free the phone line”. Change that to 10 or 15 seconds and this will ensure that the line is free before it tries to place another call.