Polycom DOC2237A manual Net-2/Net-4/Net-8 ISDN/T1-CAS Network Interface Data Stream

MGC Hardware and Installation Manual

The Net-2/Net-4/Net-8 ISDN/T1-CAS Network Interface Data Stream

Figure 4-16 shows a block diagram of the Net-2/Net-4/Net-8/Net-8L network interface of the MGC unit.

RJ45	ISDN
Span A

RJ45

Span B

Telephone

Network

Lines

Backplane	IO-2
	IO-4

NET
	A
	B
IO-2	IO-4	IO-8

Figure 4-17: Net-2/Net-4/Net-8 ISDN/T1-CAS and Net-8L ISDN Network Interface Block Diagram

The ISDN Network Interface Module is connected to the telephone network via the IO card (IO-2, IO-4 or IO-8), which is connected to the PABX and CSU. The customer is responsible for supplying the PABX and CSU.

The ISDN data stream flows from the ISDN telecommunication network through the PABX > CSU > MGC RJ-45 input connector > IO card (IO-2, IO- 4 or IO-8) > Backplane connectors > Network Interface Module to the Backplane information bus.

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