We have a uc520, 7.03, with 4 handsets.
The system is connected to a bri ISDN 2e.
When a user dials externally, the first call always recieves the fast/busy tone, if the user redials the same number the second time, the call successfully connects???
This appears to happen from any of the four extensions even if mobile numbers or landlines are dialled.
All timeouts with regards to interdigit/busy are the system default.
Is this fast/busy tone as a result of the call being matched to dialplan or something?
Does anyone have any ideas?
No they shouldn't...
Strange indeed, unless you haven't saved the configuration in CCA, which you say you did. Is it working now?