Use P-Asserted ID where you need to hide the outbound CLI with ‘Anonymous”. As with Outbound trunking, to avoid number spoofing, sys admins can only present DID numbers currently held by the customer account.
Registration, Peering and IAX2 explained
“Registration” is used to connect IP phones and some IP-PBX machines to our hosted cloud PBX using a UserName and Password to authenticate access.
1. UserName: [phone number] eg 612898085001
2. Password: account or line
3. Proxy: call.sipcity.com.au + Port: 5...
SIP Error Response Codes
On our network the "401 Unauthorised" relates to Registration only and is part of our authentication INVITE process, where your phone system first attempts to communicate with us. We reject the INVITE with the 401 and expect your system to return the correct AUTH details via an ...
Why can’t I register my VoIP device?
Firewalls are a common cause of SIP registration failure with your VoIP device where the firewall blocks incoming traffic required by our SIP registration process. Remember that the process of any SIP registration comprises a sequential number of requests and challenges between your PBX or handse...