Cisco Systems 1500 manual 14 TDM4E System Configuration One Wavelength Only

Chapter 1 Product Overview

System Modules

Note ESCON (Enterprise System Connection) is an IBM registered trademark.

Each TDM4E contains four submodules (or interfaces) that guarantee optical receiving and transmission. These optical ESCON interfaces are connected to the MUX/DMX unit on the main board of the TDM4E. The MUX/DMX modules electrically multiplex and demultiplex asynchronously up to four ESCON channels to one optical channel for transmission.

The remote transmitter (R/T) generates the optical output signal and feeds it into the remote line. The remote receiver (R/R) receives the optical signal from the remote end of the communication link, converts it into an electrical signal, and then transfers it to the MUX/DMX module. Figure 1-14 shows a typical TDM4E system configuration.

Figure 1-14 TDM4E System Configuration (One Wavelength Only)

Local
lines	Submodule 1	TDM4E
Channel1
	o
(ESCON)	e		R/T
		R/T
	Submodule 2	e	e
Channel2		o	o
	o
(ESCON)	e
	Submodule 3	MUX/DMX
Channel3
	o	R/R	R/R
(ESCON)	e
		e	e
		o	o
Channel4	Submodule 4
	o
(ESCON)	e
		Remote fiber line
		(bidirectional)

					Local
TDM4E				le 1 lines
	S	ubmodu
			o		Channel1
			e		(ESCON)
				le 2
	Submodu
			o		Channel2
			e		(ESCON)

MUX/DMX

Submodule 3

o Channel3

e (ESCON)

Submodule 4

o		Channel4
e		(ESCON)
	47264

The local ports use multimode fibers. Remote data is transmitted bidirectionally using single-mode fiber only.

	Cisco Metro 1500 Series Hardware Installation Guide
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