Digicom SNM70 User manual

SNM70
Central Site Modem
USER'S MANUAL
Cod. 7D1114 rev. 1.0 02/98
SNM70CP.pm6 4/8/98, 14:461

http://www.digicom.it
SNM70CP.pm6 4/8/98, 14:462

Index
I
INDEX
PREFACE II
1. GENERALITY 1.1
1.1. PRODUCT PACKAGE CONTENTS 1.1
1.2. PRODUCT FEATURES 1.1
2. INSTALLATION 2.1
2.1. HARDWARE INSTALLATION 2.1
2.2. SOFTWARE INSTALLATION 2.1
2.2.1. WINDOWS 95/NT4.0 2.2
2.3. FRONT PANEL 2.2
Fig. 3.1. SNM 70 Front view 2.3
2.4. REAR PANEL 2.3
Fig. 3.2. SNM 70 Back side view 2.3
3. DESCRIPTION 3.1
3. DUAL MODEM SETUP 3.1
3.1. MODEM AT COMMAND SET 3.1
3.1.1. AT COMMAND SET DESCRIPTION 3.1
3.2. S-REGISTERS 3.11
3.2.1. S REGISTER DESCRIPTION 3.12
3.3. FACTORY CONFIGURATIONS 3.15
3.3.1. MODEM FACTORY CONFIGURATION 3.15
4. DIAGNOSTIC 4.1
4.1. DIAGNOSTIC ACTIVATION 4.1
4.2. DIAGNOSTIC ACTIVATION 4.1
4.2.1. LOCALANALOG LOOPBACK TEST (CCITT LOOP 3) 4.1
4.2.2. LOCAL DIGITAL LOOPBACK TEST (CCITT LOOP 2 LOCAL) 4.1
4.2.3. LOCALANALOG LOOPBACK WITH SELF TEST 4.2
4.2.4. REMOTE DIGITAL LOOPBACK 4.2
4.2.5. REMOTE DIGITAL LOOPBACK WITH SELF TEST 4.2
DECLARATION OF CONFORMITY IV
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II
Preface
PREFACE
All rights reserved; no part of this publication may be reproduced, stored in a retrieval system, or trasmitted in
any form or by any means, electronic, otherwise, without the prior written permission of Digicom S.p.A..
The contents of this booklet may be modified without prior permission.
Every possible care has been taken in testing and putting together all the documentation contained in this
booklet, however Digicom can not take any responsability brought by the use of this booklet.
Microsoft, Windows 95 are trademarks of Microsoft Corporation.
ENVIROMENTAL CONDITIONS
ENVIRONMENTAL RELATIVE
TEMPERATURE HUMIDITY
from 0 to + 45 ° Cfrom 20 to 80% n.c..
Rapid changes of temperature or humidity should be avoided (0,03 ° C/min).
This equipment, including cables, should be installed in an area free from:
l Dust, humidity, heat from direct sun light.
l Objectswhich irradiateheat.These couldcause damageto thecontainer orother problems.
l Objects which produce a strong electtromagnetic field (loudspeakers, etc.)
l Liquids or chemical corrosive substances.
GENERAL WARNINGS for all equipment powered directly from mains power
POWER SUPPLY 220-240 Volt single phase 50 Hz
FUSES only those indicated on the equipment label
ISOLATION CLASSIFICATION only those indicated on the equipment label
NOMINAL CURRENTS only those indicated on the equipment label
To avoid electric shock, the equipment should never be opened.Ask qualified personnel help.
Disconnect the power cable from the wall outlet when the equipment is not to be used for a
long period. To disconnect the cable pull it by the plug, never pull it by the cable itself.
If there should be liquid or object penetration in the equipment, disconnect the power cable
and call a qualified personl for testing.
WARNING
In this equipment is present a Lithium Battery to store the user configuration.
Pleasedonot recharge,dismount, heat andburn thelithiumbattery. Keep awayfrom children.
In case of substitution, please use a similar battery; as a different one can cause explosions
or fire.
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Preface
III
Please contact authorized people to change the battery.
The battery is polarized, please do not reverse the end terminals. Battery are considered
dangerous weste goods and be destroyed following the present regulation.
CLEANING THE TERMINAL
Use a clean and soft cloth. Wet the cloth with water or natural detergent if it is necessary to
remove any stains.
Never use chemical products such as petrol or solvents.
VIBRATIONS OR DROPPING
Caution against vibrations and dropping
WARNING
This is a class A product.
In a domestic environment this product may cause radio interference
in which case the user may be required to take adequate measures.
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Generality
1.1
1. GENERALITY
This operating manual describes the installation
procedures and the main features of the
SNM 70, the innovative K56Flex™ host modem.
DEAR CUSTOMER,
Thank you for choosing a Digicom modem.
Untilrecently only thelarge InternetService Providershavebeen ableto offer56Kconnectivity
totheir subscribers. Now Digicom,Italy’smajor modemmanufacturer,providesthisinnovative
and unique 56K host modem that will enable any business to benefit from the near ISDN
connecting speeds for remote access to LANs, BBSs or PC’s.
The SNM70 K56Flex host modem is a direct replacement for the slower 33.6 V34bis modem.
At the host site (or remote LAN access node) the SNM-70 connects to the telephone network via a
single ISDN Basic rate Interface (BRI). The SNM-70 has 2 RS232 communication ports for interface
to the host equipment and can accept 2 simultaneous incoming connections at 56K.
To realise the 56K connection speed the remote user (client) must have a K56Flex standard
modem and simply dials one of the two telephone numbers to connect to the host modem.
Onhandshaking the SNM70determines themaximumspeed of56K andareliable connection
is established. If the incoming call is from a slower 33.6 V34 modem then connection is made
at 28.8/33.6 Kbps, or the fastest speed supported by the remote user modem.
1.1. PRODUCT PACKAGE CONTENTS
l 1 User manual
l 1 SNM 70 modem
l 1 Cable to connect the modem to the ISDN line
l 1 Floppy diskette or CD ROM containing Modem Drivers
1.2. PRODUCT FEATURES
l Computer speed: up to 115.200 bit/s
l Serial interfaces: 2 x V.24 (RS232)
l Enchanced AT commands set with autobaud for the data mode up to 115.200 bit/s.
l Up to 2 factory configurations
l Up to 4 telephone numbers in the phone book
l Data modem modes for: K56flex™, V.34, V.32bis, V.32, V.22bis, V.22.
l Auto dial and autoanswer
l Error Correction: MNP 4 and V.42
l Data Compression: MNP 5 and V.42bis
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Installation
2.1
2. INSTALLATION
2.1. HARDWARE INSTALLATION
See the following picture to connect
your modem to the COM port of your
PC or Router and the ISDN cable to
the BRI socket.
See the following picture to connect
your modem to the GEO port of your
Macintoshandthe ISDN cableto the BRI
socket.
After the cable installation, connect the power cord to the
mainpower supplyoutletand switchON thepower switch
on the rear panel. Check that the green LED PWR
indicator light is on.
For the next step see the section Software Installation.
2.2. SOFTWARE INSTALLATION
l WINDOWS 95/NT4.0 DRIVER
Before starting with the software installation, please read the file Readme.txt present on the
Floppy Disk or the CD ROM included with the modem package. In this file you can read more
details about the driver installation for the different versions of Windows 95 and also the latest
release notes or driver upgrades not available at the time of printing this manual.
l MACINTOSH Driver ARA/Open Transport
Make a copy of the SNM70 driver file from the Floppy Disk or the CD ROM to your hard disk
in the folder Modem Script (System Folder- Extension-Modem Script).
Your SNM 70 driver is present in the modem list and available for any application that uses
ARA/Open Transport.
Remember to select the correct communication port in the application in accordance with the
hardware installation.
l OTHER DRIVERS
For other Operating Systems, see the installation procedures on the Floppy Disk or the CD
ROM included with the modem package.
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2.2
Installation
2.2.1. WINDOWS 95/NT4.0
1. Run Windows95/NT4.0
2. Select from the START icon: Settings-Control Pannel- Modem-Add
3. From the window Install New Modem put a tick in the box “Don’t detect my modem: I will select it
from a list” and select the button: Next.
4. From the new window Install New Modem click the button Disk
5. Insert the Floppy disk or the CD ROM in the appropriate drive and from the window : Install from
disk check that the correct driver letter appears showing where your Floppy/CD ROM is inserted
(eg. A or D), then click the button OK
6. From the list select the driver to use (e.g. Digicom SNM 70) and click Next
7. Select the COM port where your modem is connected, then clik Next and then Finish
Your modem is installed and ready to make the first connection.
2.3. FRONT PANEL
On the front panel are present LED that indicate the most important interface circuit in use. In
the following table, is present the complete description and function of each LED:
NAME COLOR STATUS FUNCTION
PWR green on SNM 70 powered ON
C108 (DTR) red on Data Terminal Ready Modem A (JC)
C103 (TD) red on Transmit Data Modem A(JC)
C104 (RD) red on Received Data ModemA(JC)
C109 (DCD) red on Data Carrier Detector Modem A (JC)
C108 (DTR) red on Data Terminal Ready Modem B(JA)
C103 (TD) red on Transmit Data Modem B (JA)
C104 (RD) red on Received Data Modem B (JA)
C109 (DCD) red on Data Carrier Detector Modem B (JA)
MDM1 red on Modem 1 (A) active
off Modem 1 (A) non active
MDM2 red on Modem 2 (B) active
off Modem 2 (B) non active
B1 red on B1 channel in use
off B1 channel non active
flashing B1 channel busy
B2 red on B2 channel in use
off B2 channel non active
flashing B2 channel busy
TEST push-button Active the Loop 3 test (Local Loop)
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Installation
2.3
SNM70
CENTRAL SITE MODEM
C10 8
C10 8
C10 3
C10 8
C10 8
AB
PWR
C10 9
MDM1
MDM2
C10 9
C10 8
C10 3
C10 4
C10 8
C10 3
C10 4
B1
B2
Fig.3.1. SNM 70 Front view
2.4. REAR PANEL
On the rear panel is the power switch, the two V24 interface connectors and the RJ45 ISDN
network connector.
JC RS232-V.24/V.28 female serial interface connector of the modem 1 (A)
JA RS232-V.24/V.28 female serial interface connector of the modem 2 (B)
JD RJ45 ISDN network connector
JA JC JD JB
Fig.3.2. SNM 70 Back side view
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Description
3.1
3. DESCRIPTION
3. DUAL MODEM SETUP
The SNM70 has dual, fully featured, digital K56flex modems inside one box: infact on the rear
pannel you can see the RS232 serial interface connector of modem 1 (orA) indicated as JC
and the RS232 serial interface connector of modem 2 (or B) indicated as JA.
For the above reason, the user must setup of the two modems separatly. We suggest startingt
the setup with the modem 1 connector JC and then proceed with the modem 2 connector JA.
The following AT command description is valid for each modem.
3.1. MODEM AT COMMAND SET
The modems support the AT command set, to define the configuration, initiate or terminate
modem communication, and to test the modem and the communication link. The modem will
work in two basic modes: command mode and data mode.
Command mode is when the modem is not connected to another modem, therefore “Off Line”
or in a idle condition. In this mode the modem will accept commands beginning withATprefix.
Data mode is when the modem is connected to another modem, that is an “On Line” condition
or functioning. In this mode all the characters sent from computer are interpreted as data and
they are sent to the remote modem. You may switch from data to command mode by entering
anescapesequence.Thedefault escapesequenceis +++this must haveat least onesecond
before and after being keyed. To go back into data mode simply typeATO.
Data Length
Each caracter of the AT command must be an ASCII code with any of the following format
combinations:
START BIT DATA BIT PARITY STOP BIT TOTAL
171110
180110
170210
171110
The modem will accept even, Odd, mark, or space.
3.1.1. AT COMMAND SET DESCRIPTION
AT Attention
All the characters following the letters ‘AT’ are commands. InAT command mode the modem
automatically detects the computer speed and parity format. The modem will response using
the same speed and parity format ofAT command.
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3.2
Description
A Answer incoming data call
Cause the modem to go off hook and attempt a handshake in answer mode
A/ Repeat last command
Cause the modem to repeat the lastAT command. This command is neither preceded by AT
not followed by CR
D Dial Command
0:9 Dial number
S=n Dial one of the four stored phone numbers (n=0-3) in the modem non volately memory (See &z Command)
L recall the last number dialed
E Commands Echo
E0 Commands echo disable.
E1 Commands echo enable.
Default=E1
H DISCONNECTION
H0 Modem disconnects
H1 Modem connects to the line and remain in command mode for the time defined in S7.
I IDENTIFICATION
I0 Maximum line speed
I1 Product type
I2 Checksum firmware
I3 Product name
I4 Firmware release
I5 Country Code active
N AUTOMODE ENABLE
N0 Automode detection is disabled (equivalent to settingAT+MS=X,0).
N1 Automode detection is enabled (equivalent to settingAT+MS=X,1).
Default=N1
Note: see also “AUTOMODE” parameter in AT+MS command
O RETURN ON LINE
O0 On line state when during connection the modem is in command mode.
O1 Like previous plus equalaizer retrain.
Q QUIET RESULT CODES
Q0 Display result codes.
Q1 No result code (quiet).
Default=Q0
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Description
3.3
S READ/WRITE A REGISTER
Sn=x Write value x to S Register n.
Sn? Read value at S Register n.
V VERBOS RESULT CODE
V0 Result code display as digit (short form).
V1 Result code display as words (extention form).
RESULT CODE SHORT & EXTENDED FORM SUMMARY
SHORT EXTENDED
0OK
1 CONNECT
2RING
3 NO CARRIER
4 ERROR
5 CONNECT 1200
6 NO DIALTONE
7 BUSY
8 NO ANSWER
10 CONNECT 2400
11 CONNECT 4800
12 CONNECT 9600
13 CONNECT 7200
14 CONNECT 12000
15 CONNECT 14400
16 CONNECT 19200
17 CONNECT 38400
19 CONNECT 115200
22 CONNECT 1200TX/75RX
23 CONNECT 75TX/1200RX
40 CARRIER 300
44 CARRIER 1200/75
45 CARRIER 75/1200
46 CARRIER 1200
47 CARRIER 2400
48 CARRIER 4800
49 CARRIER 7200
50 CARRIER 9600
51 CARRIER 12000
52 CARRIER 14400
53 CARRIER 16800
54 CARRIER 19200
55 CARRIER 21600
56 CARRIER 24000
57 CARRIER 26400
58 CARRIER 28800
78 CARRIER 31200
79 CARRIER 33600
66 COMPRESSION: CLASS 5
67 COMPRESSION: V42 bis
69 COMPRESSION: NONE
76 PROTOCOL: NONE
77 PROTOCOL: LAPM
80 PROTOCOL:ALT
150 CARRIER 32000
151 CARRIER 34000
152 CARRIER 36000
153 CARRIER 38000
154 CARRIER 40000
155 CARRIER 42000
156 CARRIER 44000
157 CARRIER 46000
158 CARRIER 48000
159 CARRIER 50000
160 CARRIER 52000
161 CARRIER 54000
162 CARRIER 56000
165 CARRIER 32000
166 CARRIER 34000
167 CARRIER 36000
168 CARRIER 38000
169 CARRIER 40000
170 CARRIER 42000
171 CARRIER 44000
172 CARRIER 46000
173 CARRIER 48000
174 CARRIER 50000
175 CARRIER 52000
176 CARRIER 54000
177 CARRIER 56000
Note: The commands in the above list
can be followed by \ARQ message
SHORT EXTENDED
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3.4
Description
W REPORT AT CONNECTION
W0 When connected the modem displays:
CONNECT and the digital rate.
W1 When connected the modem displays:
Line Speed,Error Correction Protocol (if any),Digital rate
W2 When connected the modem displays:
CONNECT and line speed.
Default=W2
X DIAL TONE DETECTION
X0 Busy and dial tone detect disable. OK and ERROR code enable.
X1 Busy and dial tone detect disable. OK and CONNECT xxxxx code enable.
X2 Dial tone enable only. OK, NO DIAL TONE and CONNECT xxxxx enable.
X3 Busy tone enable only. OK, BUSY and CONNECT xxxxxx enable.
X4 Busy and dial tone enable OK, BUSY, NO DIAL TONE and CONNECT xxxxx enable.
Default=X1
Y BREAK DISCONNECTION
Y0 Disable long space disconnect.
Y1 Enable long space disconnect. In non-error correction mode or in buffer mode, the modem will send
a long space of four seconds prior to going on-hook. In error correction mode, the modem will send
respond to the receipt of a long space (a break signal greater than 1,6 seconds) by going on-hook.
Default=Y0
Z RESET AND LOAD USER PROFILE
Z0 Reset and load user profile 0.
Z1 Reset and load user profile 1.
+MS= MODULATION FORMAT
This extended-format command selects the modulation, optionally enables or disable
automode, and optionally specifies the lowest and highest rates using one to four
subparameters. the command format is:
AT+MS=[mod],[automode],[min_RXrate],[max_RXrate],[law],0,[max_TXrate]
# [mod] = modulation type
# [automode] = automode enable or disable
# [min_RXrate] = min Receive speed
# [max_RXrate]= max Receive speed
# [law] = 0 for USA
= 1 for Europe
0 = fixed value (do not modify)
#[max_TXrate] = max Trasmission speed
l Modulation type (see the below table)
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Description
3.5
MOD MODULATION POSSIBLE RATE bps
0 V.21 300
1 V.22 1200
2 V.22bis 2400 or 1200
3 V.23 1200
9 V.32 9600 or 4800
10 V.32bis from 14400 to 4800
11 V.34 from 33600 to 2400
56 K56Flex from 56000 to 32000
l Automode: see the ATN command
l RX speed min/max: These parameters permit to define, within a modulation standard, the
minimum and maximum receive rate.
The command AT+MS? show the currently modem configuration, the default value is:
56,1,300,33600,1,0,56000
Some configuration examples
l Modemset upwithautomode enabled,K56Flex, with Receiveline speedbetween300bps
to 33600 bps and Trasmission rate at 56000.
AT+MS=56,1,300,33600,1,0,56000
l Modem set up in V.34 with automode disabled and speed fixed at 33.600 bps
AT+MS=56,1,300,33600,1,0,33600
In this case the modem makes the connection only if the computer speed is equal to or
greater than 33.600 bps.
%C COMPRESSION CONTROL
%C0 Compression disable.
%C1 MNP5 enable only.
%C2 V42bis enable only.
%C3 MNP% and V42bis enable.
Default=%C3
%E AUTORETRAIN CONTROL
%E0 Autoretrain disable.
%E1 Autoretrain enable.
%E2 Fallback/fallforward enable. Enable only in error correction or buffer mode.
Default=%E2
%F Flash Eprom code Up grade
This command enables the upgrade of the internal Flash Eprom code.
The upgrade is similar to a file transfer: a new code file in your Computer is tranferred to the
Flash Eprom in the equipment.
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3.6
Description
This special file transfer uses a simple ASCII protocol at 115.200bit/s, 8 bit, no parity, 1 stop
bitand hardwareflowcontroll. UsinganASCII filetranfer checkthefollowing parametervalues:
Pace character=0
Line pacing=0
Character pacing=0
%F Upgrade starts.after this command, followed by a simple instruction coming from
the modem.
IMPORTANT NOTE The upgrade is only possible using the 2nd modem serial port (JA).
%L DISPLAY RECEIVE LEVEL IN DBM
Returns a value which indicates the received signal level.
For example, 009 = -9 dBm, 043 = -43 dBm.
%Q LINE SIGNAL QUALITY
From 000 (good quality) to 127 (poor quality, disturbed signal).
&C CARRIER DETECT OPTION
&C0 Carrier detect always ON. When modem disconnect DCD (C109) goes OFF for 1 sec.; function 109
wink.
&C1 Carrier detect is ON when remote carrier is present.
Default=&C1
&D DATA TERMINAL READY OPTION
&D0 DTR signal is ignored.
&D1 Modem return to Command Mode upon detecting ON to OFF transition on DTR.
&D2 Modem hangs up and disables auto-answer upon detecting ON to OFF transition on DTR.
&D3 Modem reset upon detecting ON to OFF transition on DTR.
Default=&D2
&F FACTORY CONFIGURATION
&F0 Load factory configuration 0.
&F1 Load factory configuration 1.
&G GUARD TONE
&G0 Disable Guard Tone.
&G2 Select 1800 Hz Guard Tone. Only in V.22 (1200 bps) and V.22 bis (1200 bps) modulations.
Default=&G0
&K FLOW CONTROL
&K0 Flow control disable.
&K3 Hardware flow control (RTS/CTS) enable (Default for data modem modes).
&K4 Software flow control (Xon/Xoff) enable.
&K5 Software flow control (Xon/Xoff) in trasparent mode enable.
&K6 Hardware and software flow control enable (default for fax modem modes).
Default=&K3
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Description
3.7
&Q OPERATING MODE SELECTION
&Q0 Asyncronous direct mode
&Q5 Operation with error correction. It is automatically selected with \N command (different fron 0 and 1)
&Q6 Asynchronous with buffer enabled (AT/N0)
Default=&Q5
&S C107 (DATA SET READY OPTION)
&S0 DSR will remain ON all the times.
&S1 DSR will became active after answer tone has been detected and inactive after the carrier has been
lost.
Default=&S0
&T TEST AND DIAGNOSTIC (LOOP)
To use AT&Tn commands the modem must be without error correction (AT\N0).
&T0 Terminate test in progress.
&T1 Local analog loopback.
&T3 Local digital loopback.
&T4 Grant Remote digital loopback test request by remote modem.
&T5 Deny Remote digital loopback test request by remote modem.
&T6 Remote digital loopback.
&T7 Remote digital loopback with self-test.
&T8 Local analog loopback with self-test.
Default=&T4
&V VIEW ACTIVE PROFILES
&V0 Display the parameters of active profile
&V1 Display the data of active profile
&W STORE ACTIVE PROFILE
&W0 Store active profile as Profile 0.
&W1 Store active profile as Profile 1.
&Y DEFINE DEFAULT PROFILE AFTER POWER ON
&Y0 Use profile 0 after power on.
&Y1 Use profile 1 after power on.
Default=&Y0
&Z STORE THE X TELEPHONE NUMBER IN A N LOCATION
AT&Zn =X (n = from 0 to 3; X = dialing string from 0 to 35 numbers).
&Z STORE CALLER IDENTIFICATION NUMBER (CALLER ID)
This command enables the storing of a telephone number for the CALLER ID function.
&Z4=nnnn where nnnn is the telephone number without prefix
&Z4? show the stored telephone number
To enable the CALLER ID function, please also make reference to the AT*I command.
Store: yes Default= n/a
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3.8
Description
&Z5 STORE MULTISUBSCRIBER NUMBER (MSN)
Thiscommand enablesthethestoringof owntelephone numberfortheMultiSubscriberNumber
function.
&Z5=nnnn where “nnnn” is composed of prefix + number (p.e. 331702611)
&Z5? show the stored MultiSubscriber number
To enable the MultiSubscriber Number function, please also make reference to the AT*M
command.
Store: yes Default= n/a
&Z6 STORE SUBADDRESS NUMBER
This command enables to storing the Subbaddres field for the Subaddress function.
&Z6=ssss where ssss is the Subaddress field with a maximum of 4 alphanumeric characters (0, 1, 2, 3, 4, 5, 6,
7, 8, 9,A, B, C, D, *, #).
&Z6=? show the stored Subaddres field
To enable the Subaddress function, please also make reference to the AT*S command.
Store: yes Default= n/a
&Z7 TEI MANAGEMENT
This command allows to define the kind of TEI (automatic or fixed)
AT&Z7=from 00 to 63. Gives and stores a specific TEI (fixed TEI)
AT&Z7= automatic TEI
\A MNP BLOCK SIZE
\A0 Block size 64 chr.
\A1 Block size 128 chr.
\A2 Block size 192 chr.
\A3 Block size 256 chr.
Default=\A1
\B BREAK SIGNAL SIZE
\B1 to \B9 In non-error correction mode, the modem will trasmit a break signal to the remote modem with a
lenght in multiples of 100 ms according parameter specified. The command works in conjunction
with the \K command. In error correction mode, the modem will signal a break through the active
error correction protocol, giving no indication of the length.
\G FLOW CONTROL BETWEEN MODEM
\G0 Flow control disabled
\G1 Flow control enabled
Default=\G0
\K SET BREAK CONTROL
Controls the response of the modem to a break received from the Computer or the remote
modem or the \B command according to the parameter supplied. The response is different in
three separate states.
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Description
3.9
1) The first state is where the modem receives a break from the Computer when the
modem is operating in data transfer mode.
\K0 Enter on-line command mode, no break sent to remote modem.
\K1 Clear data buffer and send break to remote modem.
\K2 Same as 0.
\K3 Send break to remote modem immediatly.
\K4 Same as 0.
\K5 Send break to remote modem in sequence with trasmitted data.
2) The second case is where the modem is in the on-line command state (waiting for
AT commands) during a data connection, and the \B is received in order to send a
break to the remote modem.
\K0 Clear data buffer and send break to remote modem.
\K1 Same as 0.
\K2 Send break to remote modem immediatly.
\K3 Same as 2.
\K4 Send break to remote modem in sequence with data.
\K5 Same as 4.
3) The third case is where a break is received from a remote modem during a non-error
corrected connection.
\K0 Clear data buffers and sends break to the Computer.
\K1 Same as 0.
\K2 Send a break immediately to Computer.
\K3 Same as 2
\K4 Send a break in sequence with received data to Computer.
\K5 Same as 4.
Default=\K5
\N ERROR CORRECTION AND BUFFER CONTROL (MNP AND V42)
\N0 Selects normal speed buffered mode (disables error correction mode). Forces &Q6.
\N1 Serial interfaceselected. Selectsdirect modeandis equivalentto &M0,&Q0 modeoperation.Forces
&Q0.
\N2 Selects reliable (error correction) mode. The modem will first attempt a LAPM connection and then
an MNP connection. Failure to make a reliable connection results in the modem hanging up. Forces
&Q5.
\N3 Selects autoreliable mode.This operatesthesameas\N2exceptfailure tomake areliable connection
results in the modem falling back to the speed buffered normal mode.
\N4 Selects LAPM error corrector mode. Failure to make an LAPM error-correction connection results in
the modem hanging up. Forces &Q5.
\N5 Selects MNP error corrector mode. Failure to make an MNP error-correction connection results in
the modem hanging up. Forces &Q5.
Note: Error correction starting from V22 standard
Default=\N3
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3.10
Description
*I Caller Identification function (CALLER ID)
The CALLER ID function is used to identify the originate of an incoming call. In order for this
feature to work, both the originate and the answer SNM 70 must have their CALLER ID
feature enable. Enabling the CALLER ID at the originate, allows the transmission of the
originator’s telephone number. Enabling the CALLER ID at the answer, allows the caller’s
telephone number to be displayed on the receiver terminal.
The message CALLER ID appears on the screen as follows:
RING: nnnn where “nnnn” is the caller’s telephone number
*I0 CALLER ID function disable
*I1 CALLER ID function enable
To insertthe CALLERID numberinto SNM70, please makereference totheAT&Z4 command.
Store: S100 (bit 0) Default= *I0
*M MultiSubscriber Number function (MSN)
The MultiSubscriber Number permits the association of maximum 8 consecutive numbers to
aBRIaccess of thenational plan number.There’s aprincipalnumber with thelast digit always
equal to “0” and associated with it is an auxiliary number that may vary between “1” and “7”.
The called SNM 70 checks the incomming called party number with the number stored in its
memory with the AT&Z5 command; if the two numbers matched then it answers the call,
otherwise it does not.
In order for this feature to work, the receiver SNM 70 must have the MSN feature enable.
*M0 MultiSubscriber number function disable
*M1 MultiSubscriber number function enable
To insert the MultiSubscriber number into SNM 70, please make reference to the AT&Z5
command.
ATTENTION
The MultiSubscriber is an optional feature: verify with your Telecom operator to
enable it.
Store: S100(bit 1) Default=*M0
*S Subaddress function
The Subaddressing mode allows the identification of the 8 multinumber addreses connected
to the same BRI interface. This feature is managed only by the local and remote SNM 70.
The ISDN network only allows for the delivery of the subaddress field.
The called SNM 70 sends the telephone number followed the Subaddress field (ATDnnn+sss
where nnn is the telephone number and sss is the Subaddress field with a maximum of 4
alphanumeric characters); the calling SNM 70 compares the received Subaddress to the
stored Subaddress.
If there’s a match then it answers the call, otherwise it does not.
In order for this feature to work, both the originator and the receiver SNM 70 must have their
Subaddres feature enable.
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Description
3.11
*S0 Subaddress function disable
*S1 Subaddress function enable
To insert the Subaddress field into SNM 70, please make reference to the AT&Z6 command.
Store: S100 (bit2) Default=*S0
*W Port Selector
This command selects the serial port to be activated on answering an incoming call
*W0 If the B1 and B2 channels are available, the first incoming call is addressed to the serial port JC. If
the B1 is busy and only B2 is available, the incoming call is addressed to the serial port JA.
*W1 The incoming call is addressed to the serial port in accordance with the subaddress defined.
*W2 The incoming call is addressed to the serial port in accordance with the MSM defined.
3.2. S-REGISTERS
S-registers are byte-wide locatiosn in SNM 70 memory containing information about its
configuration.
All values are in decimal format.
If the register type is non-storable, the register value has to be written after SNM 70 reset or
powered-on.
REG. RANGE UNIT DEF. DESCRIPTION
S0 0-255 Ring 0 Ring to answer on
S1 0-255 Ring 0 Ring count
S2 0-255 ASCII 43 Escape character
S3 0-127 ASCII 13 Carriage return character
S4 0-127 ASCII 10 Line Feed character
S5 0-127 ASCII 8 Back Space character
S7 1-255 1 sec. 60 Wait for data carrier
S8 0-255 1 sec. 2 Pause time for “,” character
S9 1-255 100ms 6 Answer tone detection time
S10 1-255 100ms 14 Lost carrier to hang up delay
S12 0-255 20ms 50 Escape sequence code guard
S18 0-255 1 sec. 0 Test timer
S30 0-255 1 min 0 Inactivity timer on data (cannot be stored)
S32 0-255 ASCII 17 Xon character
S33 0-255 ASCII 19 Xoff character
S91 -3-15 db 10 Adjust transmission level
S92 -3-15 db 10 Adjust transmission level in fax mode
S95 0-255 ASCII 2 Connection messages management
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