PSTN SERVICES

Lecture OverviewPOTS

Integrated Services Digital Network

Business Services

Service Provider services

THE POTS

The Plain Old Telephone NetworkProvides a dial tone to rotary and touch pad

phonesType 500 phones Type 1500 phonesType 2500 phonesOffers 911 services Additional features

Customer Calling feature Customer Local Area Signaling Service feature Voice Mail

Customer Calling Features Call Forwarding Call Waiting Three way Calling Speed DialingAdded NumbersAll are individual services Can be packaged by SPs

CLASS Features Provide customers with a powerful and

convenient tool to control the incoming and out going calls

Introduced by TeleCordia (Bell core) Customers interact with the switch software

and direct personally which services they want Customers Originated Trace Automatic Call BackAutomatic RecallDisplay featuresCalling number Blocking

VOICE MAIL An alternative to the answering machinesVoice Answering is still available if the called

party is busy Voice Messaging Fax messaging

THE ISDN

INTEGRATED SERVICES DIGITAL NETWORK

Basic Rate Interface (BRI)02 B Channels

Bearer Channel 64 kbps Transmits voice and data

01 D Channels 16 kbps Call Control Messages Up 9.2 kbps voice or data

Primary Rate Interface (PRI)23 B Channels, 01 D Channel, 08 T1 linesD Channel does not transmit packet data

BUSINESS SERVICES

BUSINESS SERVICESVirtual Private Networks

Dedicated Access Lines Logical VPNs

Lagecy VPNs IP Sec VPNs MPLS/BGP VPNs

CENTREX SERVICES Call Handling Convenient Calling

Automatic dial, speed dial, ring again, and caller IDCustomer Dialing Plans Management and Security

CALL CENTER SERVICES

SERVICEP ROVIDER’S SERVICES

SPSDatabase Services

800 services 900 servicesCalling Card Service Authorization Services

Operator’s Service Virtual Private Networks Toll and Assistance Services Directory Assistance ServicesBilling Services