13
Chapter 1 - Introduction & Description
1.4
Product Description
There are two basic models of MultiMux MMH900 series available: a
four channel and eight channel units with internal command modem,
optional composite link modems and a command port. The four channel
MultiMux MMH904 connects four async devices to asynchronous
channels that transfer data at a channel speed of up to 38.4K bits per
second (bps). The eight channel MultiMux MMH908 connects eight
async devices. The composite link of the MultiMux MMH900 series can
be configured for various dial-up and lease line modems, a Digital
Service Unit (DSU) for digital communications over a Digital Data
Service (DDS) or dedicated network, or an ISDN terminal adapter for
Basic Rate Interface Service. The command port allows you to
configure the MultiMux MMH900 series for your channel configuration,
internal hardware and composite link configuration.
A simplified block diagram of a MultiMux network is shown in Figure 1-3
to give you a pictorial view of a complete network. The MultiMux
represented in the figure is a MultiMux MMH904 connected to four async
devices on CHANNEL 1 through CHANNEL 4. The workstation
connected to the COMMAND PORT is the supervisory console in which
you can communicate with the command processor or command
modem. If a remote connection is needed to the command modem, a
separate DIAL-UP connection is provided. The composite link can be
configured for an internal 28.8K bps dial-up/leased line modem, internal
DSU for digital communications over a digital data service (DDS)
network or an ISDN terminal adapter for Basic Rate Interface Service. It
can also be configured for external synchronous link device with either
V.24 or V.35 interface.
Command
Port
Command
Modem
Dial-Up Modem
Lease Modem
DSU
Composite
Link Data
Composite
Link
Workstation PC
Dial-Up Modem
Lease Modem
Digital
Data
Processor
Command
Processor
ATCommands
I/O
Channel
4
Channel
3
Channel
2
Channel
1
I/O
Dial-up
Workstation PC
AT Commands
AT Commands
AT Commands
Channel
Data
Channel
Data
MultiMux 900 Series
PDN
Composite
Link
Dial-up
Line
PDN
Dial-up
Line
C
o
m L
p i
o n
s k
i
t
e
Figure 1-3. MultiMux MMH900 Series Block Diagram
To setup a MultiMux MMH900 series, the async devices have to be
connected to the channels, the composite link connected to the public
data network (PDN) and the MultiMux has to be configured for the
Summary of Contents for MMH900
Page 1: ...MMH900 Series Statistical Multiplexer User Guide...
Page 7: ...Chapter 1 Introduction Description...
Page 26: ...Chapter 2 Configuration...
Page 33: ...Chapter 3 Front Rear Panel Descriptions...
Page 44: ...Chapter 4 Installation...
Page 51: ...Chapter 5 Commands...
Page 89: ...Chapter 6 Operating Procedures...
Page 96: ...Chapter 7 Troubleshooting...
Page 111: ...Chapter 8 Service Warranty Technical Support...
Page 116: ...Appendices...
Page 184: ...Glossary...
Page 193: ...Glossary 193 X Y Z...
Page 200: ...S000315A...