Background PSTN/SS7 networking IP networking ATM networking

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Presentation transcript:

Background PSTN/SS7 networking IP networking ATM networking SONET networking WDM networking Telephony data model 11/21/99

Bidirectional DS0 circuit PSTN Bidirectional DS0 circuit DS0 lines TDM Switch TDM Switch TDM Switch TDM Switch Trunks T1 A T1 (1.5 Kbps) is a time-multiplexed signal of 24 DS0 (64 kbps) A TDM switch maps bits arriving in one time slot to another time slot on an output port 11/21/99

SS7 network architecture Databases (e.g. 800) TDM Switch A TDM Switch B STP STP F TDM Switch TDM Switch B C TDM Switch TDM Switch STP STP TDM Switch A TDM Switch STP: Signal Transfer Point: datagram router A-F: Types of signaling links Databases (e.g. 800) 11/21/99

SS7 protocol stack STP Switch TCAP SCCP SCCP MTP L3 MTP L3 MTP L2 I S U P SCCP SCCP MTP L1 MTP L2 MTP L3 MTP L3 MTP L2 MTP L1 MTP L3-L1 Message Transfer Part Level 3 to Level 1 TCAP Transaction Capabilities Application Part SCCP Signaling Connection Control Part ISUP ISDN User Part 11/21/99

MTP L3 Connectionless (datagram) NL protocol Addressing scheme: point code (14 or 24 bits) SLS OPC DPC MTP L3 Header MTP L2 Header ISUP or ISUP/SCCP or TCAP/SCCP 8 24 24 Network Identifier Cluster Cluster Member 8 8 8 SLS Signaling link Selection DPC Destination Point Code OPC Originating Point Code 11/21/99

Basic call setup (using ISUP) SSP DTMF Signaling SSP SSP ANM ANM RING IAM ACM ACM RESPONSE IAM Does MTP L3 packet forwarding STP IAM Initial Address Message ACM Address Complete Message ANM Answer Message SSP IAM 11/21/99

Call setup with advanced services (using TCAP) 516-555-1278 SCP STP STP Local Carrier Local Carrier 800-555-4400 516-555-1278 Long distance carrier Switch Switch Long Distance SCP STP STP SCP 800-555-4400 Switch Switch ring Signaling links Voice trunks 800-555-4400 516-555-1278 STP: Signal Transfer Point SCP: Service Control Point 11/21/99

IP protocol stack 11/21/99

TCP 11/21/99

UDP 11/21/99

IP network routing protocols 11/21/99

ATM protocol stack 11/21/99

Types of AAL 11/21/99

Service classes 11/21/99

CAC 11/21/99

Scheduling 11/21/99

ATM addressing 11/21/99

ATM signaling 11/21/99

ATM network routing protocol 11/21/99

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