I have found the service from the initial contact to the installation to be first class and I would recommend Opus without hesitation.
John Bell
Estate Property Manager

Please follow the instructions below to change the system time and date on the Aastra Intelligate PBX.
From any internal extension
Time:
Lift handset
Dial +57 hhmm (beep)
Hangup
Date:
Lift handset
Dial +58 dd mm yyyy (beep)
Hangup
*Note – system must be software version i7 or above.
If you need any assistance, then please call the Opus service helpline on 020 8545 8545.