Racal-Vadic VA3450P Series User manual

Racai-Vadic
VA3450P/S/G-SERIES MODEM
INSTALLATION/OPERATION
MANUAL
[1J!IJ~{J(]
The Electronics Group
Publication Number 18008-079

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Techn1cal Publications . RACAL-VAOIC

VA3450P/S/G-SERIES MODEM
INSTALLATION/OPERATION
MANUAL
JANUARY 1982

RACAL-VADIC INC. offers a free call-in diagnostic service to assist in the operation and
testing ofall RACAL-VADIC products. RACAL-VADIC Regional Service Center personnel
are available to perform no-cost, over-the-telephone diagnostic tests of malfunctioning
equipment, to clarify options and test procedures outlined in this manual, and to describe
the operation of the controls and indicators on RACAL-VADIC products. Contact the
nearest RACAL-VADIC Regional Service Center listed below before shipping any equip-
ment in for repair.
EASTERN REGION
NORTHEASTERN REGION
SOUTHWESTERN REGION
CENTRAL REGION
WESTERN REGION
[phone]
[phone]
[phone]
[phone]
[phone]
The information in this manual has been carefully compiled and checked for technical
acc uracy . However, RACAL-VADIC Inc. accepts no responsibility for inaccuracies which
may occur. Comments or correspondence regarding this manual should be addressed to:
Racal-Vadic Inc.
Technical Publications
222 Caspian Drive
Sunnyvale , California 94086-9874
Tel. [phone]
Telex: 910-339-0207

FCC REQUIREMENTS
Connection of terminal equipment to the public switched-telephone network is regulated
by the Federal Communications Commission (FCC) as defined by FCC Rules and Regu-
lations, Part 68. These regulations require the following:
1. Before
connecting this equipment to the switched-telephone network ,' notify the
telephone company of the following information:
Name of Manufacturer ....
Equipment Model Number .
FCC
Registration Number ..
Ringer Equivalence Number
. . . . RACAL-VADIC
. . . . VA345x
(P /S/ G)
.AJ496M-67213-DM-N
.
... . ... .. . 0.9B
If other devices are to be connected with this equipment, equivalent information must
be provided for each device.
2. When trouble is experienced, disconnect this equipment from the telephone line to
determine ifit is malfunctioning. If this equipment is determined to be malfunctioning,
discontinue use until the problem has been corrected. '
3. Where such action is reasonably required in the operation of its business, the telephone
company may make changes in its communications facilities, equipment , operations
and procedures. If this occurs , you will be notified by the telephone company in
writing .
'
Connection of this equipment to party lines and coin telephone service is prohibited.
'Should this equipment cause harm to the telephone network, the telephone company
may temporarily discontinue service until the problem has been corrected .

WARNING
This equipment generates and uses radio frequency energy and, if not installed and used
properly (in strict accordance with the manufacturer 's instructions), may cause inter-
ference to radio and television reception. It has been type tested and found to comply
with the limits for a Class 8 computing device in accordance with the specifications in
Subpart Jof Part 15 of FCC Rules, which are designed to provide reasonable protection
against such interference in a residential installation. If this equipment does cause
interference to radio or television reception , which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• reorient the receiving antenna
• relocate the computer with respect to the receiver
• move the computer away from the receive_r
• plug the computer into a different outlet so that computer and receiver are on different
branch circuits.
If necessary, the user should consult the dealer or an experienced radio / television tech-
nician for additional suggestions. The user may find the following booklet prepared by
the Federal Communications Commission helpful:
"How to Identify and Resolve Radio-TV Interference Problems"
This booklet is available from the U.S. Government Printing Office, Washington, D.C.
20402, Stock No. 004-000-00345-4.

SECTION 1
SECTION 2
SECTION 3
SECTION 4
TABLE OF CONTENTS
GENERAL INFORMATION ..................... 1-1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
FEATURES . . ...... ....... . .. . .... . ..... . 1-2
PHYSICAL DESCRIPTION. . . . . . . . . . . . . . . . . . . . . 1-2
DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
INSTALLATION ........................... 2-1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
PRELIMINARY PROCEDURES . . . . . . . . . . . . . . . . . . 2-1
Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . 2-1
Equipment Supplied . . . . . . . . . . . . . . . . . . . . . . . 2-1
Additional Equipment Required. . . . . . . . . . . . . . . . 2-1
EQUIPMENT CONNECTIONS ................... 2-3
VA3450P
Connections . . . . . . . . . . . . . . . . . . . . . . 2-3
VA3450S Connections . . . . . . . . . . . . . . . . . . . . . . 2-7
VA3450G
Connections . . . . . . . . . . . . . . . . . . . . . . 2-8
PREINSTALLATION CHECKS . . . . . . . . . . . . . . . . . . . 2-9
INSTALLATION PROCEDURE . . . . . . . . . . . . . . . . . . 2-9
OPERATION .......... ... .. ... ....... .. .. 3-1
CONTROLS AND INDICATORS ... . . .. ... . ... . .. . 3-1
OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . 3-4
Manual Originate . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Manual Answer . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Automatic Answer . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Leased
Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
TESTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
TEST SWITCHES . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
DLB/OFF/
ALB . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
ST/OFF . .. ...... ..... .. . .... ... .. . . ... 4-2
FAULT ISOLATION ...... ... .. . ... . .. ... . ... 4-4
AUTOMATIC SELF-TEST .. . ...... .. ..... .. . . . 4-5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
ANALOG LOOPBACK/SELF-TEST
.. . .... .... .. ... 4-6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
ANALOG LOOPBACK/DATA TEST . . . . . . . . . . . . . . . 4-8
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Procedure .... .. .... . ...... ,. . . . . . . . . . . . . 4-9
END-TO-END/SELF-TEST . . . . . . . . . . . . . . . . . . . . . 4-10
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
v

SECTION 5
TABLE OF CO~TENTS (cont'd)
REMOTE DIGITAL LOOPBACK/SELF-TEST 0 0
Overview 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Procedure 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
REMOTE DIGITAL LOOPBACK/DATA TEST 0 0
Overview 0 0 0 0 0 0 0 0 0 0 0
Procedure 0 0 0 0 0 0 0 0 0 0 0
SERVICE CENTERS 0
OPTIONS 0 0 0 0 0
4-12
4-12
4-13
4-14
4-14
4-15
4-15
5-1
INTRODUCTION o 5-1
Standard-Options Mode 0 5-1
Verifying
Option Settings 0 0 5-2
OPTION DESCRIPTIONS 0 0 0 0 5-2
Line-Interface
Options 0 0 0 0 5-2
Line
Connection (strap a) 0 5-2
Mode Select (switch B3) 0 5-3
Transmit Level (straps e, l) 5-3
Receive Level (strap W4) 0 5-3
Amplitude Equalizer (strap W1) 0 5-3
Phase Equalizer (strap W2) 0 0 0 0 5-3
Line-Connect Switch (strap x) 0 0 5-3
Attended / Unattended Disconnect (switch A1) 0 5-4
Auto Disconnect /Abort Timer (switch B5) o 0 0 5-4
Auto Disconnect /Loss of Carrier (switch A7) 0 5-4
Auto Disconnect/Received SPACE (strap b) 0 5-4
Send SPACE on Disconnect (strap c) 0 5-4
Te
rminal-Interface Options 0 0 0 0 0 0 0 5-5
Data
Timing (switch B6) 0 0 0 0 0 0 0 5-5
Character Length (switches A3, A5) 5-5
Transmit/Receive Clock (straps t,
v)o 5-5
External Transmit Clock (strap j) 0 0 0 0 5-5
Slave Clock (strap
d) 0 0 0 0 0 0 0 0 0 0 0 0 5- 5
Force Data Terminal Ready
(switch B2) 5-5
Delayed Carrier Detect (straps
f, g) 0 0 0 5-5
Clear
To Send Control (straps p, q) 0 0 0 5-5
Terminal Control of Data Rate (strap k) 0 5-5
Data Rate
Indicator (strap r)o 0 0 0 0 0 5-6
Maximum Data Rate (switch B4) 0 0 0 0 0 5-6
Signal_Common Reference (strap
m) 0 0 0 5-6
Test-Control
Options 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5-6
Terminal Control of Local Test/Busy Out
(straps s, u, ab, ac) 0 0 0 0 0 0 0 0 0 0 0 0 0 5-6
Remote Test
(DLB) Select (switch B1) 0 0 0 5-6
Respond To Remote Test (switch A2) 0 0 0 0 5-6
Terminal Control of Remote Test (strap n) 0 5-7
Received Data
in Remote Test (straps h, w) 5-7
Data Set Ready
in Test (switch B7) 5-7
Test
Mode Indicator (strap aa) 0 0 0 , 0 0 0 0 0 5-7
vi

SECTION 6
TABLE OF CONTENTS (cont'd)
SUPPLEMENTAL INFORMATION ...... . .. . . .. . .. 6-1
EQUIPMENT INTERFACES . . . . . . . . . . . . . . . . . . . . 6-1
Terminal
Equipment (RS232C) Interface . . . . . . . . . . . 6-1
TelCo Line Interface. . . . . . . . . . . . . . . . . . . . . . . . 6-5
VA3450P Interface . . . . . . . . . . . . . . . . . . . . . . . 6-5
VA3450S Interface . . . . . . . . . . . . . . . . . . . . . . . 6-5.
VA3450G Interface . . . . . . . . . . . . . . . . . . . . . . . 6-5
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
vii

Table 2-1
Table 2-2
Table 2-3
Table 3-1
Table 3-2
Table 5-1
Table 6-1
Table 6-2
Table 6-3
Table 6-4
LIST OF TABLES
Telephone Equipment Required . . . . . . . . . . . . . . . . . . . 2-2
VA871
Options (Model Summary) . . . . . . . . . . . . . . . . . . 2-2
Telephone Options (503C, 2503C) . . . . . . . . . . . . . . . . . . 2-2
Front-Panel Switches .. . ..... . . 3-2
Front-Panel Indicators .. .. .. . ... .... . ...... . 3-3
VA3450-Series Options. . . . . . . . . . . . . . . . . . . . . . 5-9
RS232C (DTE)
Interface Connector. . . . . . . . . . . . . . . . . . 6-4
RJ11C
Connector Pin Assignments . . . . . . . . . . . . . . . . . . 6-5
RJ41S,45S
Connector Pin Assignments .. .. . . . . 6-6
TelCo Interface Signal Definitions . . .. ... .. . . 6-6
viii

LIST OF FIGURES
Figure 2-1 P-Series Modem with Standard (Voice) Telephon e . 2-3
Figure 2-2 P-Series Modem with VA871 VADICphone .. . . 2-4
Figure 2-3
P-Series Modem with 503C or 2503C Telephone
2-5
Figure 2-4 P-Series Modem without Telephone (Auto-Answer Only) . 2-6
Figure 2-5 S-Series
Modem with 503C or 2503C Telephone 2-7
Figure 2-6 G-Series
Modem (Leased-Line) 2-8
Figure 3-1 Front-Panel Display . . 3-1
Figure 4-1 Test Switch Locations . 4-3
Figure 4-2 Test Switch Functional Diagram 4-3
Figure 4-3 Analog Loopback Self-Test ..
4-6
Figure 4-4 Analog Loopback/Data Test. 4-8
Figure 4-5 End- To- End /Self-Test . . . . 4-10
Figure 4-6 Remote Digital Loopback!Self-Test . 4-12
Figure 4-7 Remote Digital Loop back/Data Test. 4-14
Figure 5-1 VA3450-Series Switch and Strap Locations. 5-8
ix

INTRODUCTION
Section 1
GENERAL INFORMATION
The VA3450-series modem is available in three basic mod-
els, as follows:
• VA3451-This top-of-line triple modem combines Bell
103, Bell 212,
and RACAL-VADIC VA3400 technologies
in a single package. The VA3451 provides full-duplex
asynchronous operation at data rates from 0 to 300 bps
(Bell 103 or RACAL-VADIC 3400 protocol) and full-
duplex synchronous or asynchronous operation at 1200
bps (Bell212 or RACAL-VADIC VA3400 protocol). Selec-
tion of operating speed and line-connect protocol is fully
automatic in the answer mode, and a front-panel speed
switch allows user selection of low-speed (300 bps) or
high - speed (1200 bps) operation in the originate mode.
• VA3452-This dual modem combines Bell 212 and
RACAL-VADIC VA3400 technologies to provide full-
duplex asynchronous operation at data rates from 0 to
300 bps and full-duplex synchronous or asynchronous
operation at 1200 bps . Automatic recognition of operat-
ing protocol is featured in both originate and answer
modes.
• VA3453- This dual modem combines Bell 103 and
RACAL-VADIC VA3400 technologies to provide full-
duplex asynchronous operation at data rates from 0 to
300 bps and full- duplex synchronous or asynchronous
operation at 1200 bps. Sel ection of operating speed and
line - connect protocol is fully automatic in the answer
mode, and a front-panel switch allows user selection of
low-speed (300 bps) or high - speed (1200 bps) operation
in the originate mode.
All
models in the VA3450 series are available in two direct-
connect versions for switched-network operation, and the
VA3453 is also available in a leased - line version. The
VA3451 ,52,53P versions are registeredfor permissive direct
connect under Part 68 of the FCC Rules and Regulations;
the VA3451,52,53S versions are registered for programma-
ble
direct connect; and the VA3453G version is designed
for 2-wire leased-line operation.
The various models in the VA3450 series are identified by
a label
on the front panel. The P, S, and G versions can be
identified by the type of connector on the attached tele-
phone cable. The P version is supplied with a miniature
6- position (4-contact) connector; the S version is supplied
with a miniature 8-position (6-contact) connector; the G
version is
supplied with a 6-position connector and a VA881
adapter .
1-1

FEATURES
PHYSICAL
DESCRIPTION
DIAGNOSTICS
The VA3450-series modem provides many standard and
optional features that allow custom tailoring to fit the needs
of a particular installation. Features available on this mo-
dem series include:
• Full-duplex, 0 to 300 bps asynchronous, 1200 bps syn-
chronous or asynchronous operation (user-selectable)
• Automatic identification of calling modem (103, 212, or
VA3400)
in answer mode, automatic identification of
VA3400 or Bell 212
in originate mode; user terminal
interface remains transparent to modem type in use
• Manual originate/manual and automa tic answer capabil-
ity,
with attended or unattended disconnect options; front-
panelline-connect switch for manual/automatic answer
selection
• Automatic disconnect with abort timer, loss of carrier, or
received SPACE (user-selectable)
• Standard-options mode for simple installation in most
user environments
• Extensive user diagnostics, including local and remote
test (Analog and Digital Loopback) capability; micro-
processor-based design features
automatic self-test;
8-element diagnostic display on front panel for rapid
fault isolation
• FCC-registered for direct-connect, switched-network op-
eration;
UL -listed, CSA-certified, Canadian TAP-approved
The VA3450-series modem is a self-contained unit consist-
ing of a
dual printed circu it board assembly housed in a
desk-top
enclosure. The modem includes an integral power
supply and a 7-foot telephone interface cable terminated in
a miniature plug that mates with standard jack arrange-
ments available from the telephone company (TelCo). A
rear -mou nted 25-pin female connector provides a standard
RS232C interface to the terminal equipment.
The VA3450 implements all standard RACAL-VADIC di-
agnostics for
full-duplex modems. An 8-element display,
visible from
the front of the unit ,monitors primary terminal
interface signals. This display, together with built-in Ana-
log
and Digital Loopback tests, provides a simple, effective
operational check of the modem .
1-2

INTRODUCTION
PRELIMINARY
PROCEDURES
Unpacking and
Inspection
Equipment
Supplied
Additional
Equipment
Required
Section 2
INSTALLATION
This section provides installation procedures for VA3450-
series modems . In case of difficulty during any of the
following procedures, contact the nearest RACAL-VADIC
Regional Service Center
listed at the front of this manual.
Procedures in this section
should be performed in the
sequence and manner speci-
fied.
Any deviation may dam-
age
the equipment.
Inspect shipping carton immediately upon receipt. If the
carton has been damaged, request that the carrier's agent be
present during unpacking. Inspect contents for physical
damage and/or missing parts . If contents have been dam-
aged
or parts are missing, immediately notify the nearest
RACAL-VADIC sales office.
The VA3450-series modem is supplied with an attached
telephone interface cable
and powersupply. Thebasic model
number for each unit is printed on the front label, and the
version (P, S, or G) can be determined by the connector
type, as described in Section 1.
The following items are required for installation:
1. Data
terminal equipment (RS232C) interface cable-
terminated with a 25-pin male D-type connector (Cinch
or Cannon DB-19604-432).
2. Telephone line jack as specified in Table 2-1.
3. A standard telephone (VA872) or an optional voice/ data
telephone set (RACAL-VADIC VA871 VADICphone or
TelCo 503C
or 2503C data telephone) is required if man-
ual operation is desired. SeeTable 2-2 for VA871 models,
or see Table 2-3 for 503C
and 2503C options. (Note that
the VA871 can be used only with the VA3450P version .)
2-1

Table 2-1. Telephone Equipment Required
Model No. USOC* Description Connection
VA3450P RJ11C Voice jack
Permissi ve
RJ41S
Universal da ta jack (6-position plug)
RJ45S
Programmed data
jack
VA3450S RJ41S Universal data jack
Programmable
RJ45S
Programmed data (8 - position plug)
jack
VA3453G N/A
Leased-line jack Leased-line
(2-wire)
* TelCo
order i ng code
Table 2-2. VA871 Options (Model Summary)
Model No. Description
VA871AA Dataset Control, Rotary Dial
VA871BA Dataset Control, Touch-Tone®Dial
VA871AM Telset
Control , Rotary Dial
VA871BM Telset Control, Touch-Tone®Dial
Table 2-3.. Telephone Options (503C, 2503C)
Option Description
A 1 Tel
set Controls Line*
A 2 Dataset
Controls Line**
B 3
Aural Monitoring Not Provided
B 4 Aural Monitoring Provided
c 5 Touch-Tone®Dial
c 6 Rotary (Pulse) Dial
D 7
Switch-Hook Indication ***
D 8
Mode Indication
*Manual Answer only
** Auto Answer only
*** Required by modem
2-2

EQUIPMENT
CONNECTIONS
VA3450P
Connections
The P-series modem is designed for permissive connection
to the switched-telephone network . This modem may be
installed in the following configurations:
Voice
Phone Connection-Figure 2-1 shows modem con-
nections when used with a standard (voice) telephone. This
configuration may be used for manual originate / manual or
automatic answer operation with attended or unattended
disconnect.
Mates with
Rj11C Voice Jack
( TeiCo-supplied)
T-Adapler ~
(supplied with modem) ~
~---~ ToDTE
(user-supplied)
VA3450 · 03
Figure 2-1. P-Series Modem with Standard (Voice) Telephone
2-3

VADICphone Connection - Figure 2-2 shows modem co n-
ne c tions when used with the optional VA871 VADICphone.
If the VADICphone is connected for telset control
(VA871AM,BM), the modem will operate in manual origi-
nate / manual answer modes only with attended disconnect;
if the VADICphone is connected for dataset control
(VA871AA,BA), the modem will operate in manual origi-
nate /a utomati c answer modes with e ither attended or un-
attended disconnect. SeeVA871 Installation/Operationguide
(RACAL-VADIC Publi ca tion No. 18008-025) for further
information.
Mates with
RJ11C Voice Jack
VA871 VA DICphone
(RACAL-VADIC accessory)
ToDTE
(user - supplied)
VA 34 5 0-04
Figure 2-2. P-Series Modem with VA871 VADICphone
2-4

Data-Phone Connection-Figure 2-3 shows modem con-
nections when used with aTelCo-suppliedData-Phone(503C/
2503C).
Operating modes available in this configuration are
identical to those described under the previous VADIC-
phone connection. See Table 2-3 for phone options.
RJ41S, RJ45S Data Jack ~
(TeiCo-supplied) ®
~
503C, 2503C Telephone
(TeiCo-supplied)
ToDTE
._ __ ~~--..., (user-supplied)
VA3450·05
Figure 2-3. P-Series Modem with 503C or 2503C Telephone
2-5

No Phone Connection-For automatic answer only appli-
cation , the modem may also be connected without a tele-
phone as shown in Figure 2-4.
Mates with
RJll C Voice Jack
or
RI41S , RJ45S Data Jack
(TeiCo-supplied]
-To 110 V ac outlet
VA3450-06
Figure 2-4. P-Series Modem without Telephone (Auto-Answer Only)
2-6

VA3450S
Connections
The S-series modem is designed for programmable direct
connection to the switched-telephone network. This is nor-
mally
used with a TelCo-supplied Data-Phone (503C/2503C)
as
shown in Figure 2-5. If the phone is connected for telset
control, the modem will operate in manual originate/man-
ual answer modes only with attended disconnect; if the
phone is connected for dataset control, the modem will
operate in manual originate/ automatic answer modes with
either attended or unattended disconnect. See Table 2-3 for
phone options .
RJ41S. RJ45S Data Jack 6-lh
(TeiCo-supplied) <Sl
~
503C. 2503C Telephone
(TeiCo-supplied)
VA3450-07
Figure 2-5. S-Series Modem with 503C or 2503C Telephone
2-7