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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!
(Use the right Grandstream option - "Disable Direct IP calls" is for making calls, not receiving them) |
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See: [[VoIP Call Rate Limits]]
== IP
IP
▲On the Voiceless platform you can specify the IP as a subnet in CIDR format, e.g. 192.0.2.0/29, and multiple IPs can be comma separated.
Valid examples:
==Snom Phones==
Snom has a page about securing their devices on their wiki:
=Odd incoming calls that are not on the CDRs?=
Also some equipment may support the disabling of calls being sent direct from the Internet. For example, Grandstream firmware often has a feature ''Allow Incoming SIP Messages from SIP Proxy Only'', which is worth using (unless you need to accept such calls).
Your equipment may also support a feature whereby incoming INVITE messages are only accepted if they use the User ID which you used when registering with the SIP server, maybe named ''Check SIP User ID for incoming INVITE''. The SIP server will know this User ID, random SIP spammers will not. This User ID is ''not'' the Authentication Username (e.g. +442083xxxxxx), but what is often termed ''Username'' in equipment configuration (where you can set a Username and a Real Name, e.g. ''fred'' and ''Fred Bloggs'') which is used in SIP calls.
[[File:aa-button.png|link=http://aa.net.uk/telecoms.html|Telecoms page on our main website]]
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