Voice and Data

• DID Direct inard dialling. The capability of bypassing an autoattendant or directory and dial direct yet it still only needs to have for example 8 trunk lines for 50 end numbers
• MLPPP - Multi-Linked Point to Point Protocol - Bonded T1's
• MLPS - Multi Protocol Label switching
• Ethernet
• QoS -refers to resource reservation control mechanisms rather than the achieved service quality. It may be needed for VOIP, Alarms, Video Conferencing
• CoS - Class of Service (CoS) is a way of managing traffic in a network by grouping similar types of traffic (for example, e-mail, streaming video, voice, large document file transfer) together and treating each type as a class with its own level of service priority. Unlike Quality of Service (QoS)
• ATM- Asynchronous Transfer Mode
• Frame Relay
• VPN
• Edge Router
• TOS Bit - Type of service bit. A special bir within an IP packet that directs a router to give preferential treatment to slected packets
• IPsec - Is a standard or protocol for securing IP communications bu authenticating and encryting a communication session.
• SIP - Session Initiation Protocol - Protocol for delivering communications similar to PRI's

PRI

Primary Rate Interface is a switched service used over a T1 for voice calls that. The difference btewtween a T1 and a PRI is that it uses the 24th channell to control how to use the other 23 channels