Multi-Tech Systems MMV1600 owner manual Configuration 2 Composite Link Configuration

2.3 Configuration 2

Configuration 2 is two MultiMux MMV1616C sixteen channel multiplexers with two external Multi-Tech 56K bps Digital Service Units (DSUs) linking the two sites over a Digital Data Service (DDS) network. The RS232C interface on The DSUs is connected to COMPOSITE LINK A EXTERNAL MODEM/DSU connector on the back panel of the MMV1616C. The MMV1616Cs are set up for an external link device with a maximum link speed of 56,000 bps. Composite link A needs to be set up for external clocking. Both external DSUs must be set for DDS clocking. Configuration 2 is shown in Figure 2-2.

Composite Link

PDN

Asynchronous		Asynchronous
Channel
	Dial-Up Line	Channel
	MT56DSU2	MT56DSU2
MultiMux 16
		MultiMux 16
MultiMux MMV1616		MultiMux MMV1616

Unix Host

Local Site

(Node 1)

Printer

Terminal Terminal

Printer

TerminalPrinter

Remote Site

(Node 2)

Figure 2-2. Configuration 2

The channels are set up with the same considerations as in Configuration 1. The composite link configuration may be changed using the List Composite Link Configuration ($L) command which is shown in the following example.

DSU			LOOP
TYPE	SPEED	CLOCKING	BACK
EXTERNAL	56000	EXTERNAL	OFF

Configuration 2 Composite Link Configuration