SIP & Network
A virtual connection that carries voice calls over IP between a business phone system and a voice provider, replacing physical phone lines.
A SIP trunk is defined by an IP address or registration credentials, a permitted concurrent call limit, and a set of allowed destinations. Provisioning is fast, which is exactly why abuse is fast too.
Trunks authenticated only by IP address are vulnerable if the customer's network is compromised; credential-authenticated trunks are vulnerable to brute-force attacks.
Per-trunk concurrency caps, destination restrictions, and spend limits are the most effective single defence against overnight toll fraud.
Breaking into a business phone system or SIP trunk — usually through weak credentials or an exposed port — to place fraudulent outbound calls.
The unauthorized use of a phone system or account to place calls that someone else has to pay for, usually to expensive international destinations.
The network element that sits at the edge of a voice network to control signaling and media, enforce security policy, and normalize SIP between networks.
The rate at which new call attempts are offered to a network, and one of the clearest early indicators of an automated dialing campaign.
SipShield scores live SIP traffic with patented AI so the controls behind this term run automatically — and leave the audit trail regulators expect.