Configuration 2 - Mmh900 Series With Voice/Fax - Multitech DataTalker DT101 Owner's Manual

2.3 Configuration 2 - MMH900 Series with Voice/Fax

Configuration 2 adds voice capability to an existing data-only network using the same composite
link. The example shown in Figure 2-2 had an existing data-only network consisting of a MultiMux
MMH904C multiplexer connected to a host computer at the local site and a second MMH904C
connected to terminals and/or PCs and a shared printer at the remote site. To add voice
capability, a DataTalker is added between the composite link of the MMH904 and the public data
network (PDN) at both sites. The composite link between the two sites is now moved from the
MMH904 multiplexer to the new DataTalker. The composite link of the MultiMux MMH904 is
reconfigured as an external synchronous link device and connected to the synchronous data
channel of the DataTalker. The voice capability is added by connecting a telephone to the FXS
port on the back panel of the DataTalker at each site and configuring the voice/fax channel of the
DataTalkers for FXS to FXS. Now, while you are transferring data over the composite link, you
can pick up the telephone and have a simultaneous voice conversation.
Asynchronous
Channel
E R BUFFER F L L E R T E A S I N T E R N A L L I N K D E V I C E
A T R FULLNESS LEVEL O C T R N K A I E T O M T S C N Y K 6 5
Command Modem Channel Five Channel Six Channel Seven Channel Eight S M IT N 1 2 3 V C R L A R M L D W N M O D E I N L U S D
CD RCV XMT OH DTR RCV XMT RCV XMT RCV XMT RCV XMT K
External Composite Link Channel one Channel Two Channel Three Channel Four I n t e r n a l C o m p o s i t e L i n k
CD RCV XMT CTS V.35 RCV XMT RCV XMT RCV XMT RCV XMT D S U M M H 2 8 3 4 C D C D R C V R C V X M T C T S X M T C T S 2 8 . 8 5 6 1 9 . 2 2 4 . 0 R T S 1 9 . 2 1 4 . 4 N S O H O O S T R T M
V 2 9 / V 3 3 M o d e m C D R C V X M T C T S
MultiMux MMH904
Voice/Fax
Channel
Telephone
Local Site
Figure 2-2. Adding Voice to Data-Only Network
The async channels of the MultiMux MMH904s operate the same way as in the data-only
network. The MMH904 is reconfigured for an external link device by changing the 8-position DIP
switch position 2 to the down (closed) position, ensuring that the composite link is configured for
sync mode, and setting clocking to External. An RS232C cable can now be connected to the
COMPOSITE LINK EXTERNAL RS232C/V.35 connector on the back panel of the MMH904.
The composite link connection of the DataTalker to the PDN depends on the type of link device
being used. If the link device is an internal 33.6K bps modem, connect the Modem DIAL-UP or
LEASED connector to the PDN. If the link device is an internal DSU or ISDN terminal adapter,
connect the DSU/TA DIGITAL connector to the PDN. If an external link device is used, cable it to
the EXTERNAL COMPOSITE RS232C/V.35 connector. The connection type depends on whether
the interface of the external link device is RS232C or V.35. If it is V.35, a shunt on the main board
of the DataTalker must be moved to the V.35 position.
You must configure the DataTalker before you connect it to the MultiMux MMH904. To configure
the DataTalker, place DIP switch position 3 in the down (closed) position and connect a command
port device such as a terminal or a PC to the DATA/COMMAND connector on the back of the
DataTalker. Turn on the DataTalker and PC and run your communications software in terminal
mode. (Set it for direct connection at a serial port speed of 19,200 bps or slower.) Press the
ENTER key to establish communications with DataTalker and see the Main Menu.
Sync Data
Channel
Composite Link
MultiT ech
( M o d e m s ) 9 V 2 H M M Systems
/ V 3 3 3 8 2
4 MultiMux
Statistical Multiplexer
E C D B U P
PDN
Data / Voice / Fax Concentrator
VOICE /
FAX 2 FXS FXO E&M FAX XMT RCV XSG RSG COMPOSITE LINK RXT FCR RD TM V35 28.8 EXT DTR DBUP MDM OH DSU TA
DATA/ XMT RCV FC COM VOICE / FXS FXO E&M FAX XMT RCV XSG RSG STATUS CD RCV XMT CTS 56 RTS NS OOS 2B
COMMAND ORIG FAX 1 101 MDM/TA
DATA/
COMMAND XMT RCV FC COM
DataTalker
Sync Data Asynchronous
Channel
Channel
R F R T A I N T E R N A L L I N K D E V I C E
R E T BUFFER FULLNESS LEVEL L O T C I K L N M O E T E S T S Y N C 6 5 ( M o d e m s ) 2 V M M MultiT ech Systems
Command Modem Channel Five Channel Six Channel Seven Channel Eight N A M S R C L R A L A R W E D M D O L I K S D 3 V / 9 8 2 H
CD RCV XMT OH DTR RCV XMT RCV XMT RCV XMT RCV XMT IT 1 2 3 V M N E N K U 3 4 3 MultiMux
External Composite Link Channel one Channel Two Channel Three Channel Four I n t e r n a l C o m p o s i t e L i n k Statistical Multiplexer
CD RCV XMT CTS V.35 RCV XMT RCV XMT RCV XMT RCV XMT M M H 2 8 3 4 C D R C V X M T C T S 2 8 . 8 2 4 . 0 1 9 . 2 1 4 . 4 O H T R E C D B U P
V 2 9 / V 3 3 M o d e m D S U C D C D R C V R C V X M T C T S X M T C T S 5 6 1 9 . 2 R T S N S O O S T M
MultiMux MMH904
Data / Voice / Fax Concentrator
VOICE / FAX 2 FXS FXO E&M FAX XMT RCV XSG RSG COMPOSITE RXT FCR RD TM V35 EXT MDM DSU TA
VOICE / LINK STATUS 28.8 DTR DBUP OH
ORIG FAX 1 FXS FXO E&M FAX XMT RCV XSG RSG 101 MDM/TA CD RCV XMT CTS 56 RTS NS OOS 2B Voice/Fax
DataTalker
Channel
Telephone
Printer
Remote Site
Chapter 2 - Configuration
25