ESPRIT Statmux User manual

Esprit Statmux User Manual December 1997 Issue 1.3 Page 1 of 36
ESPRIT
8/16 Channel Statistical Multiplexer
User Manual
WARNING - BEFORE INSTALLATION, PLEASE
REFER TO SAFETY INSTRUCTIONS IN APPENDIX A,
AND EMC INSTRUCTIONS IN APPENDIX C
Certified Compliant in the EC, when fitted in accordance with the installation
instructions, against the following directives/standards:
Low Voltage Directive (73/23/EEC and amendment 93/68/EEC)
EN60950 : 1992 (Safety)
Electromagnetic Compatibility directive (89/336/EEC and subsequent
amendments to date):
EN55022 : 1994 (Emissions)
EN50082-1 : 1992 (Immunity)
Telecommunications Terminal Equipment directive (91/263/EEC and
amendment 93/68/EEC) where indicated in approvals requirements
section.
Part Number: EA 08600B

Esprit Statmux User Manual December 1997 Issue 1.3 Page 2 of 36
CONTENTS
1 INTRODUCTION 4
1.1 Functional Overview 5
2 USE AND CONFIGURATION 6
2.1 Data Channel Connection 6
2.2 Default Channel Setup 6
2.3 Changing the Configuration 6
2.4 Supervisor Terminal requirements 6
2.5 Supervisor Terminal Emulations 7
2.6 General Set-Up display layout 8
2.7 General Keyboard Conventions 8
2.8 Composite confiuration
2.9 Statmux channel configuration 10
2.10 Copying another channel's set-up 10
2.11 Modem Configuration Options 12
3 INSTALLATION 14
3.1 Supply Voltage & Connection 14
3.2 Environmental Considerations 14
3.3 Mechanical Construction 14
3.4 Composite Interface Selection 14
3.5 Composite Connection 15
3.6 Parameter Values 15
4 TROUBLESHOOTING 17
4.1 Front Panel LEDs 17
4.2 Diagnostics & Loopbacks 17
4.3 Back to Back testing 18
4.4 Statistics 18

Esprit Statmux User Manual December 1997 Issue 1.3 Page 3 of 36
APPENDICES
A. Installation Warnings 20
B. Approval Requirements 23
C. EMC Requirements 24
D. Rear Panel Layout 26
E. Supervisor Port Pinout V.24 25 Way D Type DCE 27
F. Composite Link Interface Pinouts DTE 28
G. V.24/V.28 Data Channel Pinout 8 Way RJ45 Type DCE 29
H. Composite Link Network Cables X.21/V.11 30
X.21bis/V.35 31
X.21bis/V.24 32
I. Back to Back Cable 33
J. V24 Modem Connections & Setup 34
K. Technical Specification 35

Esprit Statmux User Manual December 1997 Issue 1.3 Page 4 of 36
Esprit 8/16 Channel
Statistical Multiplexer
User Manual
1 INTRODUCTION
The Esprit is an 8 or 16 channel asynchronous statistical multiplexer, which may be
used with Dial up Modems and Leased lines (such as KiloStream™) up to 256 Kbps in
the case of the 16 channel unit or 64Kbps for the 8 channel.
The unit is easily configured from either end of the link, using a terminal or a PC running
a terminal emulation package.
This user manual covers installation and setup of user options for the multiplexer.
A full set of cable specifications are available in the appendices.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 5 of 36
Note: Max rate for 8 channel unit is 64K
1.1 Functional overview
The Esprit has 8 or 16 asynchronous ports, and a single composite link which has a
selectable interface type (X.21, V.24 or V.35) .
The composite interface supports synchronous link rates of up to 256Kbps (64Kbps for
the 8 channel unit), either dial up or leased line, for connection to Modems or digital
services such as BT KiloStream™.
The sixteen channel unit will support data rates of up to 115.2Kbps, with a maximum
aggregate of 1843.2Kbps.
The eight channel unit supports rates up to 38.4Kbps with a maximum aggregate of
307.2Kbps.
Unrestricted speed conversions are also possible by setting different data rates at the
local and remote sites.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 6 of 36
2 USE AND CONFIGURATION
This section covers connection and set-up of the channel data ports. The composite
port is covered in Section 3, the installation section of this manual.
2.1 Data Channel Connection
Peripherals are connected to the V.24/V.28 8-way 'RJ45' type connectors configured
DCE and numbered 1 to 16 (1 to 8) at the rear of the multiplexer. The pin connections
for these data channels are defined in Appendix G.
2.2 Default Channel Setup
When delivered, the Esprit Statistical Multiplexer is set to operate with all channels set
as follows:
Rate : 9600 bps
Bits/Char : 8
Stop Bits : 1
Parity : NONE
Flow Control : XOFF
RTS : ON
Mode : NORMAL
2.3 Changing the Configuration
The Esprit may be configured using an asynchronous terminal. A laptop PC running
an asynchronous terminal emulation program such as PCAnywhere™, CrossTalk™ or
Blast™ is ideal for the field engineer.
Windows™ Terminal may also be used to configure an Esprit but please note that
under Settings - Terminal Preferences, the box for 'Use function, arrow and ctrl keys
for Windows' must NOT be set. If it is, then you will not be able to move the cursor
around on the screen.
The terminal should be connected via its serial port to the SUPERVISOR port on the
rear of the multiplexer.
2.4 Supervisor Terminal requirements
The terminal must be configured to:
8 bit character, no parity, one stop bit, speed 9.6Kbps, Xon/Xoff
A suitable cable for connection of the Supervisor port is defined in Appendix E.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 7 of 36
Please select terminal type from the following:
1 = VT52
2 = VT100
3 = ADDSVP
4 = ADM3A
5 = H1500
6 = N8009
7 = TVI920
ESPRIT 16 CHANNEL STATISTICAL MULTIPLEXER Vx.xx
=====================================================================================
Carrier : V.11 PRESENT 64K Channels 1 - 16 :
Link Clock : EXTERNAL Modem Setup :
Mode : NORMAL Statistics :
Configuration : >LOCAL
Channel :12345678
Rate : 9600 9600 9600 9600 9600 9600 9600 9600
Bits/Char :88888888
Stop Bits :11111111
Parity : NONE NONE NONE NONE NONE NONE NONE NONE
Flow Control : XOFF XOFF XOFF XOFF XOFF XOFF XOFF XOFF
RTS : ONONONONONONONON
Mode : NORMAL NORMAL NORMAL NORMAL NORMAL NORMAL NORMAL NORMAL
<= More More =>
Cursor Keys to move, CTRL-U to save, ESC to abandon
=====================================================================================
Use <SPACEBAR>/<+>/<-> to select
2.5 Supervisor Terminal Emulations
Several terminal emulations are supported by the Esprit. When connection is made
between the terminal or PC and the rear panel port labelled SUPERVISOR, the
following screen will appear:
The terminal type or emulation in use should be selected by pressing the relevant
number key on the PC or terminal. The monitor will now show the basic configuration
screen for the multiplexer setup. This is formatted as below (16 channel unit shown):

Esprit Statmux User Manual December 1997 Issue 1.3 Page 8 of 36
2.6 General Set-Up Display Layout
There arethree main areas on the supervisorset-up screen used to change parameters
for the Esprit:
Upper left -
System parameters (Mode,
Link Clock, Carrier, Residual,
and Configure).
Upper right -
Other display pages which
may be selected (Channels 1
to 16, Modem Setup.
Bottom -
Channel configuration.
The initial display is that for the ASYNC channels.
2.7 General Keyboard Conventions
Only a few keys are required to configure the Esprit multiplexer and are summarised
as follows:
(Ri
g
ht arrow) Moves the cursor to the next field to the ri
g
ht.
(Left arrow) Moves the cursor to the next field to the left.
(Up arrow) Moves the cursor to the next field upwards.
(Down arrow) Moves the cursor to the next field downwards.
+ (Plus) or <SPACEBAR> To
gg
les the parameter value up to the next available settin
g
.
- (Minus) To
gg
les the parameter value down to the next available settin
g
.
<ENTER> or <RETURN> Accepts the current display pa
g
e (else same as ).
<CTRL> and U Accepts all chan
g
es and causes multiplexer re-confi
g
uration.
<ESC> Abandons all chan
g
es since last <CTRL> and U.

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2.7.1 Cursor Movement
The cursor symbol ">" is moved around the screen to the required field using the arrow
keys.
2.7.2 Parameter changing
If it is possible to modify the field over which the cursor is placed, the message "Use
<SPACEBAR>, <+>, <->" is shown at the bottom of the screen. No message will
appear if the field is calculated, un-modifiable or hardware set.
Pressing the Space bar, the "+" key or the "-" key will cycle through the choices
available for a parameter.
2.7.3 Accepting all changes and Updating the configuration
If "Control" and "U" are pressed at the same time after the configuration has been
suitablyadjusted, the configuration is updated at the localand remote end as necessary
and held in Non-Volatile Memory (NVRAM.)
2.7.4 Abandoning Changes
Pressing ESC at any point before a configuration is updated will cause the message
Abandon Changes? (y/n) to appear at the bottom of the screen. If nis selected the
message will disappear and editing may continue. If yis pressed, all modifications will
be abandoned and last updated configuration will be re-painted to the screen.
2.7.5 Local or Remote Configuration.
Most settings are independent at each end of the multiplexer link e.g. Flow Control,
and Rate.
The "Configure" parameter in the upper left of the selected screen shows whether the
LOCAL or REMOTE multiplexer is being configured.
2.7.6 Changing the configuration page
The Configuration Page required, e.g. Channels 1-16, or Modem Setup etc., is
selected by moving the cursor to the upper right area and pressing Enter when
alongside the required page.

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2.8 Composite Configuration
PARAMETER CHOICES NOTES
Carrier V.24, V.11 If the screen shows either
Toggle through software V.24 or V.11 then you may
Internal link fitted to J5 toggle between the two
using the space bar.
To select V.35 , the link
fitted to J5 must be moved
to J6
V.35
Internal link fitted to J6
Link Clock Ext Normal setting.
INT [Rate] Internal clock rates of up to
256K may be set for test
purposes.(64K for 8
channel unit)
2.9 STATMUX channel Configuration
To change the Statmux channel configuration, select the configuration screen (shown
on page 7) by moving the cursor to the top line on the right hand area of the screen,
next to 'Channels 1-16:'(Channels 1-8) and pressing ENTER or RETURN.
The display shows parameters for eight data channels CH1 to CH8, or CH9 to CH16.
The alternative 8 channels are selected by moving the cursor further to the left or right
as necessary.
Each data channel has parameters selectable as detailed on the following page.
2.10 Copying another channel's set-up
Channel data may be copied from another similar STATMUX channel, by placing the
cursor over the channel number field (of the channel to be changed).
The message 'Enter number or use <+>/<-> to copy channel' appears.
Simply entering the number (if channel is less than 10) of the channel to be copied
transfers all of that channels parameters to the current channel. If the channel number
is greater than 10, the spacebar may be used to increment it through each channel
number.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 11 of 36
Esprit Channel Set-up Options
PARAMETER CHOICES NOTES
Channel 1 to 16 (8) Use spacebar or '-' key to
select another channel to
copy.
Rate 0 to 115200 bps. (38400bps Data channel bit rate.
for 8 channel) Independently settable at
each end of link.
Bits/Char 5, 6, 7 or 8 bits. Number of bits per
asynchronous character.
Stop Bits 1, 1.5 or 2 Number of stop bits per
asynchronous character.
Parity EVEN, ODD or NONE Asynchronous data parity.
Flow Control XOFF XOFF - use XON/XOFF soft
CTS CTS - Uses DTR (input) to
NONE No Flow control used
flow control
control data flow out from
MUX, CTS (output) to
control data flow from
equipment to MUX.
RTS ON Always on
OFF Always off
(DSR) Transparent to DSR
Mode NORMAL Normal RUN mode.
ECHO Data echoed locally and
sent to remote (Half duplex
mode).
LLOOP Data locally looped back to
this site. Not sent via link.
QBF1 Send Quick Brown Fox
message directly to local
port.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 12 of 36
ESPRIT 16 CHANNEL STATISTICAL MULTIPLEXER Vx.xx
=====================================================================================
Carrier : V.24 LOST Channels 1 - 16 :
Link Clock : EXTERNAL Modem Setup :
Mode : NORMAL Statistics :
Configuration : >LOCAL
Link Fallback : 30 Seconds
Status : Idle
Cursor Keys to move, CTRL-U to save, ESC to abandon
=====================================================================================
Use <SPACEBAR>/<+>/<-> to select
QBF2 Send Quick Brown Fox
message via link to remote
port.
LOOP-R Set this at remote site to
loop back data to local via
link.
2.11 Modem Configuration Options
The screen below shows the Modem Configuration options. A modem call is made
when characters are detected in any channel buffer. The call will be dropped
automatically after the period shown as 'Link fallback' after all data has been sent
successfully.
Esprit Modem/External TA Configuration options
PARAMETER CHOICES NOTES
Link Fallback PERM LINK permanently
established. Use for leased
line operation.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 13 of 36
30 Seconds, 1 Minute Time before call is
2 Minutes, 5 Minutes automatically dropped, if no
15 Minutes, 30 Minutes further data flow detected.
60 Minutes.
Status No Options Gives the current diagnostic
status of the Modem call
progress

Esprit Statmux User Manual December 1997 Issue 1.3 Page 14 of 36
3 Esprit Multiplexer Installation
BEFORE INSTALLATION, PLEASE REFER TO THE SAFETY WARNINGS IN
APPENDIX A, APPROVALS REQUIREMENTS IN APPENDIX B, and EMC
REQUIREMENTS IN APPENDIX C
3.1 Supply Voltage & Connection
A.C. 100 - 240V a.c. without adjustment.
D.C. 48V d.c. without adjustment. (OPTIONAL TBA)
The Esprit may be optionally DC or AC powered. The AC power supply is a switched
mode unit, the optional DC power supply unit being a DC to DC convertor. Both allow
considerable input voltage variation.
3.2 Environmental Considerations
The Esprit Multiplexer must be operated under the following atmospheric conditions:
Temperature: 0 to 40 degrees centigrade.
Humidity: 0% to 90% non-condensing.
Air Pressure: 86 to 106 kPa.
3.3 Mechanical Construction
The Espritis housed in a 1.5U tall 19" enclosure. An optional rack mount kit is available
on request. Three LEDson the front panel indicate the current status of the multiplexer.
The multiplexer MUST be disconnected from the power supply before opening the
unit or changing any network connections.
Screws on the left, right and top of the enclosure are removed using a Pozidrive
screwdriver to access the interior.
The rear panel (illustrated on page 26) accommodates the link interface connectors and
supervisor port.
3.4 Composite Interface Selection
The composite interface type is selected through the menu page. (X21/V11, V24, V35).
It is necessary to use the corresponding external cable to make connection once the
interface card has been fitted.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 15 of 36
3.5 Composite Network Connection
The EspritStatistical Multiplexer supports Network Interfaces of X21/V11, V35 and V24.
The composite port appears on the back panel as a 15 way D-type connector, the pin-
out for each interface standard being shown in Appendix F. Correct cables for Network
connection are shown in Appendix H.
3.6 Composite Link Parameters
Parameters in the System area (upper left) and the choices available by pressing the
Space Bar or +and -keys are:

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PARAMETER CHOICES NOTES
Link Clock EXTERNAL Rate up to 256K can be
INTERNAL 64K set on INTERNAL
V.11/V.24/
V.35 Present Shows whether the link
Lost is successfully
connected.
Mode NORMAL Normal RUN Mode
LLOOP Loops all transmitted
data to the receiver.
Configuration LOCAL "Modified" appears if
REMOTE change has been made.
In dial up mode, a call
will automatically be
made when the remote
page is accessed.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 17 of 36
4 TROUBLESHOOTING
4.1 Front Panel LEDs
On the front panel only the CARRIER light should be illuminated during normal use.
When the multiplexer is
IDLE the CARRIER LED
will flash slowly. A faster
flash shows that a call
attempt is being made on
a dial up modem.
LED LABEL CONDITION NOTES
CARRIER Slow Flash IDLE
Fast Flash Call established,
searching for
synchronisation.
Steady Green Call in progress -
passing data OK
LOOP Not illuminated Normal un-looped mode
Green Some Channels looped
or in QBF test modes.
ERROR Red Red if an ERROR has
Not illuminated Unlit if link passing data
occurred on the
composite link.
correctly.
4.2 Diagnostics & Loopbacks
A number of debug options are available. They are described in the table in section
2.10, on page 11. It is possible loop back any channel, as well as sending continuous
Quick Brown Fox messages either locally and remotely, to allow data and flow control

Esprit Statmux User Manual December 1997 Issue 1.3 Page 18 of 36
ESPRIT 16 CHANNEL STATISTICAL MULTIPLEXER Vx.xx
=====================================================================================
Carrier : V.11 PRESENT 64K Channels 1 - 16 :
Link Clock : EXTERNAL Modem Setup :
Mode : NORMAL Statistics :
Configuration : >LOCAL
Frames Sent : 9415 Frames Received : 11607
Frame Errors : 0 Frame Errors : 0
Retransmit : 0 Retransmit : 0
Throughput : 3584 Throughput : 3584
Unnumbered : 512
Carrier Loss : 0
Cursor Keys to move, CTRL-U to save, ESC to abandon
=====================================================================================
Use <SPACEBAR>/<+>/<-> to select
to be tested for proper operation.
If flow control is properly set, the messages should be received without loss when
attached to a data tester, terminal or printer. In the case of printers, it is essential to
test flow control also under off-line conditions, as many have very large buffers which
can give a misleading indication that flow control is working when it is in fact not ever
requested by the printer.
4.3 Back-to-Back Testing
It is possible to test a pair of Esprits in a back-to-back mode using a cable as described
in Appendix I
First ensure that both multiplxers are set to the same type of composite interface, then
connect the two composite ports using the appropriate cable.
Set one mux to Internal Clock and also select an valid rate for it to run at. Set the other
mux to External clock.
The multiplexers should establish carrier and perform exactly as if connected via a
digital service.
When you have finished any back-to-back testing, always set the clock back to External
as conflict will occur if it is connected to a digital data service.
4.4 Statistics
Below is an example of the Statistics page.

Esprit Statmux User Manual December 1997 Issue 1.3 Page 19 of 36
Frames sent - Number of frames that have been transmitted across the
composite link.
Frames Errors - Number of frames that have errored whilst being transmitted.
Retransmit - Number of retransmit requests received.
Throughput - Data throughput in bytes/second.
Frames Received- Number of frames that have been received across the composite
link.
Frames Errors - Number of frames that have errored whilst being received.
Retransmit - Number of retransmit requests received.
Throughput - Data throughput in bytes/second.
Unnumbered - Number of idle frames received.
Carrier Loss - Number of times that carrier has been lost.
To reset the statistics page type <CTRL> - R