1. Background PSTN/SS7 networking IP networking ATM networking
SONET networking
WDM networking
Telephony data model
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2. 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
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3. 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)
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4. 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
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5. 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
Network
Identifier
Cluster
Cluster Member
SLS Signaling link Selection
DPC Destination Point Code
OPC Originating Point Code
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6. 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
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7. Call setup with advanced services (using TCAP)
SCP
STP
STP
Local Carrier
Local Carrier
Long distance carrier
Switch
Switch
Long Distance
SCP
STP
STP
SCP
Switch
Switch
ring
Signaling links
Voice trunks
STP: Signal Transfer Point
SCP: Service Control Point
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8. IP protocol stack
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9. TCP
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10. UDP
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11. IP network routing protocols
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12. ATM protocol stack
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13. Types of AAL
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14. Service classes
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15. CAC
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16. Scheduling
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17. ATM addressing
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18. ATM signaling
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19. ATM network routing protocol
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