SBC – Session Border Controller
ISP – Internet Service Provider
FW – Firewall
PSTN – Public Switched Telephone Network
SDN/cloud – Software-define networking. This enables portability and programmability of the network infrastructure.
DNS NAPTR – Domain Name Service NAPTR is a type of Domain Name Record meaning Name Authority Pointer
DNS SRV – Domain Name Service – Service Record
RTP – Real Time Protocol
HTTPS – Hyper Text Transfer Protocol Secure
XSI over HTTPS – Xtended Service Interface
XMPP – Extensible Messaging Presence Protocol
NTP – Network Time Protocol
SIP ALG – SIP is Session Initiation Protocol ALG is a general term for an Application Layer Gateway
ZTP – Zero Touch Provisioning
DSCP label for Voice – IP Differentiated Service Code Point
