Racal-Vadic 4850PA User manual

A Racal- Vadic Modem
'Model 4850PA
User's Guide
Second Edition
First Printing
June 26, 1986
Publication No. 18.008-224

Publication No. 18008-224
WARRAR'n, LlMIft'fi(lt OF LIABILI'lY ARD SBRVICB IlUORMA'fiOH
RACAL-VADIC warrants that its products will perform in accordance with RACAL-
VADIC's published specifications (or the specification agreed to, in writing,
by Buyer and RACAL-VADIC, and made a part of the sales contract), for a period
of 24 months from date of original shipment.
During this warranty Period, RACAL-VADIC will, at no cost, promptly repair or
replace any defective equipment returned to RACAL-VADIC, transportation
charges prepaid by Buyer, and will return such equipment, transportation
charges prepaid via the same or like method as received, except where special
handling or shipment is requested by Buyer, in which case Buyer shall pay all
such charges.
This warranty shall not apply to damage resulting from abuse, negligence,
accident, loss, or damage in transit. The warranty shall be voided should the
Buyer attempt any repairs or alterations without prior written permission of
RACAL-VADIC.
RACAL-VADIC makes no other warranty, expressed or implied, and RACAL-VADIC
DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE.
THE BUYER AND RACAL-VADIC AGREE THAT THE SOLE AND EXCLUS IVE REMEDIES FOR
BREACH OF ANY WARRANTY CONCERNING THE GOODS SHALL BE REPAIR OR REPLACEMENT OF
DEFECTIVE PARI'S UPON THE TERMS ABOVE DESCRIBED OR, AT RACAL-VADIC'S OPTION,
REFUND OF THE PURCHASE PRICE. RACAL-VADIC SHALL NOT BE LIABLE FOR CONTINGENT
OR CONSEQUENTIAL DAMAGES TO PEBSONS OR PROPERTY AND ITS SOLE LIABILITY IS AS
ABOVE SET FORTH.
Any action by Buyer for any alleged breach of the warranty set forth herein
shall be brought to the attention of RACAL-VADIC by Buyer within the warranty
period, but not later then 30 days after the alleged Breach.
THIS STATEMENT OF WARRANTY AND LIMITATION OF LIABILITY IS A COMPLETE AND
EXCLUS IVE STATEMENT OF ALL WARRANTY AND LIABILITY REPRESENTATIONS OF RACAL-
VAOIC. It may not be varied, supplemented, qualified or interpreted by any
prior dealings between the parties or by any usage of the trade or upon the
face or reverse of any form to which this is attached or a part of, nor may it
be modified by any agent, employee or representative of RACAL-VADIC unless
such modification or representation is made in writing and signed by a duly
authorized officer of RACAL-VADIC.
Repairs and/or replacements under the terms of this warranty SHALL NOT EXTEND
THE WARRANTY LIFE OF THE ORIGINAL EQUIPMENT SUPPLIED. After this warranty has
expired, service can be purchased directly from Racal-Vadic.
Equipment returned to the factory should be accompanied by the following
information: the reason for return, with acomprehensive description of the
malfunction; shipping instructions; and the name and telephone number of a
contact in the event of problems.
ii
_.--

~_.....-.--- .. _.... ._ ...
Please address comments about this manual to:
Racal-Vadic
Corporate Communications
1525 McCarthy Boulevard
Milpitas, CA 95035
C 1986 by Racal-Vadic.
iii

-----
Chapter 11
Cbapt:er 2:
Chapter 3:
Publication No.
FCC REQUIREMENTS FOR END USERS •••••••••••••••••• vii
WAMANTY •••••••••••••••••••••••••••••••••••••••••i i
CBIBRAL DBSCRIftI<II
FE.A TURES ••••••••••••••••••••••••••••••••••••••• • 1-1
IHS'l'ALIATIOH
INSPECT AND INVENTORY THE MODEM ••••••••••••••••• 2-l
INSTALL THE MODEM ••••••••••••••••••••••••••••••• 2-2
PHONE SERVICE OPTIONS ••••••••••••••••••••••••••• 2-3
Connection to a Permissive Phone Line •••••••• 2-3
Connection to aProgrammable Phone Line •••••• 2-3
Connection to aLeased Line •••••••••••••••••• 2-4
OPBRATIOR
MODES OF OPERATION •••••••••••••••••••••••••••••• 3-l
GENERAL MODEM USE ••••••••••••••••••••••••••••••• 3-2
Data Link Parameters ••••••••••••••••••••••••• 3-2
Dial ••••••••••••••••••••••••••••••••••••••••• 3-2
Connect •••••••••••••••••••••••••••••••••••••• 3-2
Data Transfer •••••••••••••••••••••••••••••••• 3-3
MANUAL OPERATION •••••••••••••••••••••••••••••••• 3-3
Summary of the Keyboard •••••••••••••••••••••• J-J
Summary of the Display ••••••••••••••••••••••• J-6
DIALING FROM THE FRONT PANEL •••••••••••••••••••• 3-8
Number Storage ••••••••••••••••••••••••••••••• J-8
Dial a Stored Number ••••••••••••••••••••••••• 3-8
Dial Entered Number •••••••••••••••••••••••••• 3-9
Redial Last Number •••••••••••••••••••••••••• 3-l0
Setting Options ••••••••••••••••••••••••••••• 3-ll
Manual Originate Operation •••••••••••••••••• 3-l2
Manual Answer Operation ••••••••••••••••••••• 3-l2
AUTOMATIC OPERATION •••••••••••••••••••••••••••• 3-1J
Automatic Answer •••••••••••••••••••••••••••• 3-l3
iv
18008-224
•

....
Publication No •
Cbaper 3 (cont'd)
HOLC/SOLC Dialing ••••••••••••••••••••••••••• 3-l3
Bisync Auto-dialer •••••••••••••••••••••••••• 3-l4
RS-3660ialing •••••••••••••••••••••••••••••• 3-14
RS-366oisplay •••••••••••••••••••••••••••••• 3-16
18008-224
Chapter 4:
Chapter 5:
Appendix A:
Appendix B:
Appendix c:
Appendix D:
OPlI<MS
User Options ••••••••••••••••••••••••••••••••• 4-4
8atch Option Mode ••••••••••••••••••••••••••• 4-l0
DIAGNOSTICS
OVERVIEW •••••••••••••••••••••••••••••••••••••••• 5-1
TROUBLE-SHOOTING •••••••••••••••••••••••••••••••• S-l
WHAT TO DO WHEN THE MOOEM WON'T RESPOND ••••••••• 5-2
Check the Installation ••••••••••••••••••••••• 5-2
Check Communications Software Settings ••••••• 5-2
TFS'I'S • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 5- 3
Idle Mode Self-Test •••••••••••••••••••••••••• 5-3
Analog Loopback •••••••••••••••••••••••••••••• 5-4
Analog Loopback Self-Test •••••••••••••••••••• 5-6
End-to-End Self-Test ••••••••••••••••••••••••• 5-7
DBTAIL OP 'l'BB CXlHHBC'1'OR CABLBS
The Y Cable •••••••••••••••••••••••••••••••••• A-l
The RS-232-C Cable ••••••••••••••••••••••••••• A-4
SPECIPICATIONS
_INTBRAC'rION IN BOLe/SDLe tmDB
MESSAGE E'ORMA'l'S ••••••••••••••••••••••••••••••••• C-l
HOLC/SOLC PROTOCOL RULES •••••••••••••••••••••••• C-S
_INTBRAC'rION IN BISIRC tmDB
MESSAGE FORMATS ••••••••••••••••••••••••••••••••• O-l
BISYNC PROTOCOL RULES ••••••••••••••••••••••••••• O-3
v

Pigure 2-1.
Pigue 2-2.
Figure 3-1.
Figure 3-2.
Pigure 4-1.
Figure 5-1.
Figure 5-2.
Pigure 5-3.
Pigure 5-4.
Pigure 5-5.
Pigure 5-6.
Pigue 5-7.
Pigue 5-8.
Pigure A-1.
Pigure C-1.
Pigure C-2.
rlgure D-l.
Pigure 0-2.
'fable 3-3.
'fable 4-1.
Table 4-2.
'fable A-l.
'fable A-2.
'fable B-1.
'rable C-l.
Table C-2.
'fable C-3.
'fable D-l.
Publication No.
PIGORBS
Modem Installation with YCab1e ••••••••••••••••• 2-1
Modem's Rear Panel •••••••••••••••••••••••••••••• 2-2
The Front Panel ••••••••••••••••••••••••••••••••• 3-3
Meaning
of the RS-366 Indicators ••••••••••••••• 3-16
Location of Straps •••••••••••••••••••••••••••••• 4-3
Block Diagram of the Idle Mode Self-Test •••••••• S-3
Idle Test Mode EIA Signa1s •••••••••••••••••••••• S-3
Analog Loopback
Test •••••••••••••••••••••••••••• 5-4
Analog Loopback EIA Signa1s ••••••••••••••••••••• 5-S
Diagram
of the ALB Se1f-Test •••••••••••••••••••• 5-6
ALB Self-Test EIA Signa1s ••••••••••••••• ~ ••••••• S-6
Diagram
of the End-to-End Self-Test ••••••••••••• S-7
End-to-End
Self-Test EIA 9igna1s •••••••••••••••• 5-7
Detail of the YCab1e ••••••••••••••••••••••••••• A-3
Sample
Dial Exchange •••••••••••••••••••••••••••• C-1
HDLC/SOLC Data Frames ••••••••••••••••••••••••••• C-2
Sample
Dial Exchange •••••••••••••••••••••••••••• D-l
Bisync Data Frame ••••••••••••••••••••••••••••••• D-2
Messages from
the Modem.o ••••••••••••••••••••••• 3-7
Standard User Options ••••••••••••••••••••••••••• 4-1
Factory Options (Hard Straps) ••••••••••••••••••• 4-2
Assignment of Pins in the YCab1e ••••••••••••••• A-2
RS-232-C Terminal-Modem
Interface Signa1s ••••••• A-4
Jumper
Settings for Phone gervice Options ••••••• B-4
Structure of the HDLC/SDLC Commands and MessagesC-2
Definition of ASCII Characters ••••••••••••••••• C-3
Definition of EBCDIC Characters •••••••••••••••• C-4
structure of Bisync Commands and Messages ••••••• D-2
vi
18008-224
1

4.
Publication No.
18008-224
Connection of terminal equipment to the public switched-telephone network is
regulated by the Federal Communications Commission (FCC) as defined by FCC
Rules and Regulations, Part 68. These regulations require the following:
1. Connection of this equipment to party lines and coin telephone service is
prohibited.
2. When trouble is experienced, disconnect this equipment from the telephone
line to determine if it is malfunctioning. If this equipment is determined
to be malfunctioning, discontinue use until the problem has been
corrected.
l
3. Where such action is reasonably required in the operation of its business,
the telephone company may make changes in its communication facilities,
equipment, operations, and procedures. If this occurs, you will be
notified by the telephone company in writing.
4. If asked, the customer must provide the modem's FCC registration number and
ringer equivalence number to the local telephone company. These numbers
can be found on the modem.
FCC registration number:
Ringer equivalence number:
AJ496M-7l8l9-0M-E
0.4 B
!should this equipment cause harm to the telephone network, the telephone
company may temporarily discontinue service until the problem has been
corrected.
vii

Publication No. 18008-224
Model No. 4850PA
ID No. pending
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 interference to radio and television reception. It has been type-
tested and found to comply with the limits for a Class Bcomputing devioe in
acoordanoe with the specifications in Subpart J of Part 15 of the FCC Rules,
which are designed to provide reasonable protection against interference in a
residential installation. If this equipment does cause interference to radio
or television reception, whioh can be determined by turning the equipment on
and off, try to oorrect the interference by one or more of the following
measures:
o reorient the receiving antenna
o relocate the computer with respect to the receiver
o move the computer away from the receiver
o plug the computer into a different outlet so that computer and receiver are
on different branch circuits.
If necessary, consult the dealer or an experienced radio/television technician
for additional suggestions. You might 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
viii

r
CBAPrBR 1
GBRBRAL DESCRIPtION
The 48S0PA performs synchronous, half-duplex data
communication at either 2400 or 4800 bits per second.
This modem offers three methods of dialing. First, you can
use the built-in automatic dialer (compatible with IBM's
HOLC, SOLC and Bisynchronous protocols). Second, you can
connect the modem directly to an external dialer (Bell
801). Third, you can dial directly from the modem by using
the keyboard and the liquid crystal display.
PBAmRBS
The major features of the 4850PA are:
o Bell 208B compatible including 2400 bps fall-back mode.
o
Automatic answer and originate modes.
oManual
originate and answer modes.
o
Small size--modem fits under a standard desk telephones.
o 23 functions from 12 keys on the front panel.
o 8-character alphanumeric liquid crystal display.
oComplete operation from the front panel: dial, set
options, conduct tests, and store phone numbers.
o
Connects directly to the telephone line.
o 2-wire leased-line compatibility.
oProgrammable, software-controlled options.
o Standard options mode.
o
Automatic self-test in idle mode.
oAnalog
loopback test.
o End-to-end self-test.
o Line current disconnect
o Nonvolatile memory for options and number storage.
oAdvanced auto-dialer operates in three protocols.
General Description
1-1
Preliminary

The major auto-dialer features include:
o HDLC/SDLC compatible autodialing.
oRS-366 (801) compatible autodialing with adapter cable.
oComplete call progress detection and reporting (BDLC/SDLC
and Bisync).
o Blind dialing in all dialing modes.
o
Number storage for up to 15 phone numbers of 60 digits
each (from front panel only).
o Dialing from the front panel keypad.
o One-button redial.
o Tandem dialing in all dialing modes.
oAutomatic selection of pulse or tone dialing in all
dialing modes.
o SDLC dialer optionally compatible with NRZI.
o No telephone set required.
oBisync auto-dialer compatible with IBM Bisync in
2780/3780 RJE format.
General Description
1-2
Preliminary

•• I,
Computer
or
Terminal
Figure 2-1. IlOdea Installation with Y Cable.
Please read this chapter completely before attempting to
install your Racal-Vadic 4850PA modem. Following the
installation instructions prevents possible damage to the
modem and allows you to set up without problems.
IRSPBC'J! AND DIVEIft'ORY 'lBB IIlDBII
Racal-Vadic packs four items into the modem box. Make sure
you have all components.
o
modem
omanual
opower
adapter
o telephone cord (permissive)
Inspect the modem to make sure it has not been damaged.
Look
at its carton. If the carton is heavily damaged, or
the modem or power supply is damaged, contact the dealer or
shipping carrier.
Installation 2-1
Preliminary

Telephone Telephone
Handset Line
(Optional)
Power
Supply Terminal or Computer
Pigure 2-2. Modell's Rear Panel
DSBLL DB IIlDBII
1. Install the modem close to the computer terminal. Place
the modem so you can easily reach the controls on the
front panel.
There must be no strain on the cables.
2. To connect to acomputer terminal that has no 801
dialing port, link the modem to the computer terminal
with a standard RS-232-C cable (25 pins in each
connector with straight-through wiring). See Appendix B
for the pin assigrunents.
If connecting the modem to an automatic (801) dialing
port in addition to the computer terminal, use the
Racal-Vadic Y cable (part number 91009-094). See
Appendix B
for details of the Y cable.
Installation
2-2
Preliminary

t,
~
\
3. Connect the modem's TELCO jack to the phone line. Use
the telephone cable included in the modem package.
4. Connect the modem to the power adapter, then plug the
power adapter into a 110-volt ac, 60-hz receptacle.
5. Connect a telephone to the modem's TELSET jack. This is
optional--the modem works without it.
The phone will work in the normal fashion. (The modem
will answer all incoming voice calls unless auto-answer
has been disabled.)
Ram SBRVICB OPlI<»JS
CoImection to a Permissive Phone Line
The 4850PA modem is shipped from Racal-Vadic ready for
connection to a permissive phone line. Simply plug the
modem into the telephone wall jack, using the cable
provided. The permissive connection allows a transmission
level of -10 dBm.
COnnection to aProgrammable Phone Line
To connect the 4850PA to aprogrammable phone line, a
special cable designed for programmable operation is
required and must be ordered separately from Racal-Vadic
(part number 15048-004).
Contact your local phone company for installation of a
programmable phone
line.
Installation
2-3
Preliminary

Before the 48S0PA can operate over aprogrammable line, one
jumper must be changed on its circuit board.
1. Unplug the modem from the wall. (Do not disconnect the
power cord from the modem while it is powered up.)
2. Open the modem carefully. Four snap tabs hold the
covers together. Carefully press these tabs with a
screwdriver and gently pry the covers apart with your
fingers.
3. Find the strap labeled W2. Remove the plastic jumper
from the posts.
4. Reassemble the modem.
CcDDectlOil ~o a Leased Line
You can lease private phone lines directly from the phone
company. connect the modem to the leased line with the
phone cable provided with the modem.
Adapt the 4850PA to a leased line by changing four hardware
straps.
1. Unplug the modem from the wall. (Do not disconnect the
power cord from the modem while it is powered up.)
2. Open the modem carefully. Four snap tabs hold the
covers together. Carefully press these tabs with a
screwdriver and gently pry the covers apart with your
fingers.
3. Find strap Wl. Set the plastic jumper so that it
connects the RA
R
posts together. This changes the
dynamic range.
Installation
2-4
Preliminary

4. Find the strap labeled W2. Remove the plastic jumper
from
the posts. Replace the jumper so that it connects
posts the nBn posts together. This changes the
transmission level.
S. Find strap W3. Set the plastic jumper so that it
connects both posts together. This changes the line
connection.
6. Find the site for strap A. Solder ajumper wire across
the two holes. This bypasses the off hook relay.
7. Reassemble the modem.
N~I See Appendix B for jumper settings for phone service
options.
·Installation
2-5
Preliminary

Chapter 3
OPBRATIOM
Ill.. OF OPBRATIOM
The keys and display behave differently in the different
operational modes. Selow is a orief description of these
modes:
Idle Mode:
When the modem is not passing data, dialing, or being
manipulated from the front panel, it is in idle mode.
Data Mode:
Any time the modem is connected to the telephone line, not
dialing, and not in test, it is in data mode.
HOLC/SOLC Dialing Mode:
This mode occurs whenever the DTE interacts with the modem
using the HOLe/SOLe command set.
RS-366 Dialing Mode:
This mode occurs whenever Call Request is present on the
4850PA interface.
Bisync Dialing Mode:
This mode occurs whenever the DTE interacts with the modem
using the Bisync command set.
Test Mode:
The 4850PA is in test mode any time analog loopback or end-
to-end self-test is in operation.
Numeric Mode:
This mode occurs when the dialing, number storage, or option
routines are entered from the front panel.
Operation
3-1
Preliminary

camtIAL IOOBII USB
There are four straightforward steps to successful data
communication: Set the parameters, dial aphone number,
establish a data link (modem handshake), and transfer data.
Data Lint Para-et:ers
The first step in setting up a data link is to define the
link parameters. You might call the remote operator (by
voice) to make sure the settings are correct at both ends.
Among the parameters which should be checked are data rate,
modulation, automatic disconnects, and character set.
Dial
The second step is to call aremote system. There are four
ways to place this call. First, you could manually
originate, that is, you can connect a telephone directly to
the modem and dial manually, then connect the modem to the
phone line when voice communications are complete. Second,
you can
dial directly from the computer (in HDLe, SOLe, or
Bisync modes). This is called automatic dialing. Third,
you can dial through a Bell 801 automatic dialing port.
Fourth, you can dial directly from the modem's keyboard.
CODftect:
After dialing--but before sending data--the local and remote
modems must establish a data link (connect). Once the link
is established, the front panel LCD displays "ON LINE."
Operation
3-2
Preliminary

'.
..
.- ... '.
REDIAL
DIAL
DISPLAY
LOOP
TEST
REST
r-.
/
[]J
rn rn
rn
w
[K]
~
I
DATA SPEED
ANSWER SYNC
OPTION
ENTER
I
rn w
rn rn
[QJ
D
/Racal-Vadic
4850PA
Pigure 3-1. The Pront Panel
Data Transfer
Once connected, the modems can send or receive data. They
do
this at either 4800 or 2400 bps. The modems operate in
half-duplex mode. Half-duplex means that the data can flow
in only one direction at a time. The modem can send or
receive, but not both simultaneously.
IWIUAL OPBRATIOR
S..-ry of the Keyboard
Redial/l:
When in idle mode, this key causes the 4850PA to redial the
last number auto-dialed. When in numeric mode, this key
enters the number "1."
Dial/2:
In idle mode, this key initiates the front panel keypad
dialing sequence. This key enters the number "2" in numeric
mode.
Display/3:
When the modem is in RS-366 dialing mode, this key toggles
the display from operational status (RS-232-C signals), to
RS-366 diagnostic indicators. When in data mode or other
dialing modes, this key toggles the display between RS-232-C
indicators and operational status. In numeric mode, this
key enters the number "3."
Operation
3-3
Preliminary

~ooP/4:
In idle mode, this key places the 4850PA into analog
loopback. While in data mode, this key conditions the modem
to act as the transmitter for the end-to-end self-test. In
numeric mode, this key enters the number "4."
Test/5:
In ALB, this key initiates the self-test pattern. When
online, this key conditions the 48S0PA to act as the
receiver for the end-to-end self-test. This key enters the
number "S" in numeric mode.
Reset/K:
When in numeric mode, this key places the tandem dial pause
"K" into the dialing string. In all other modes, this key
resets all modem functions though it does not affect the
options and numbers stored in nonvolatile memory.
Data/6:
From idle mode, this key takes the modem off-hook and sets
it for originate operation. While the modem is in data
mode, pressing this key will cause the modem to immediately
return on hook. In numeric mode, this key enters the number
"6."
Speed/7:
In idle mode, this key allows the user to read the modem
speed or toggle the modem between its standard speed, 4800
bps, and fall-back mode (2400 bps). Press the SPEED key
twice. This switch overrides the setting of option 13. In
numeric mode, this key enters the number "7."
Operation
3-4 Preliminary