Telenetics MIU-PowerPort 2.4, MIU-PowerPort 9.6, MIU-PowerPort 14.4, MIU-PowerPort 28.8 User Manual

Installation, Operation & Diagnostics

for the

MIU/PowerPort Series

/ 2.4 / 9.6 / 14.4 / 28.8

Industrial Grade Dial Modems

Book 1 of 2

(See Book 2 for AT Commands)

Document No. 49-0002-002

Telenetics Corporation

26772 Vista Terrace Drive

Lake Forest, California 92630

Telephone [phone]

Fax [phone]

Document No. 49-0002-002

TABLE of CONTENTS

1. STANDARDS ....................................................................................Page 2

2. PRODUCT OVERVIEW ...................................................................Page 3

3. GENERAL PRODUCT SPECIFICATIONS .....................................Page 5

4. POWER MODES ...............................................................................Page 6

5. MODEM SPECIFICATIONS ............................................................Page 7

6. POWER CONNECTIONS ................................................................. Page 8

7. SERIAL DATA PORT PIN-OUTS.................................................... Page 9

8. DIP SWITCHES............................................................................... Page 10

9. LED INDICATOR ........................................................................... Page 11

10. AUTO RESET FEATURE............................................................... Page 11

11. AUTO DIAL FEATURE.................................................................. Page 11

12. OUTLINE DRAWING & MOUNTING.......................................... Page 12

13. MODEM CONFIGURATION ......................................................... Page 13

14. FACTORY CONFIGURATION............................................... Page 14 - 17

15. DIAGNOSTICS.........................................................................Page 18 – 28

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 1

1. STANDARDS

All Telenetics dial-up modems are designed to meet the following Standards:

USA: FCC Part 15, Class A and Part 68

Canada: DOC Standards CS-01, CS-02 and CS-03

CANADIAN DEPARTMENT OF COMMUNICATION NOTICE

NOTICE: The Canadian Department of Communications (DOC) label identifies certified equipment.
This certification means that the equipment meets certain telecommunications network protective,
operational and safety requirements. The department does not guarantee the equipment will operate to
the user’s satisfaction.

Before installing this equipment, make sure you are permitted to connect it to the facilities of the local
telecommunications company. You must install the equipment using an acceptable method of
connection. In some cases you may also extend the company’s inside wiring for single line individual
service by means of certified connector assembly (telephone extension cord). You should be aware,
however, that compliance with the above conditions may not prevent degradation of service in some
situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance facility
designed by the supplier. Any repairs or alterations made by a user to this equipment, or equipment
malfunctions, may give the telephone communications company cause to request the user to
disconnect the equipment.

For your own protection, make sure that the electrical ground connections of the power utility,
telephone lines and internal metallic water pipe system, if present, are connected together. This
precaution may be particularly important in rural areas.

Caution: Do not attempt to make electrical ground connections yourself, contact the appropriate
electric inspection authority or an electrician.

NOTICE: The load number (LN) assigned to each terminal device denotes the percentage of the total
load to the telephone loop used by the device, to prevent overloading. The termination on a loop may
consist of any combination of devices, subject to the requirement that the total of the load numbers of
all the devices does not exceed 100.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 2

2. PRODUCT OVERVIEW

The MIUPowerPortX.X Series are industrial grade dial and leased line
modems for connection to the Public Switched Telephone Network.. They
can be powered from a wide range of AC and DC power supplies, they are
internally surge protected on both the power and analog lines, and they will
operate in temperatures from -40 to +85 deg C.

Internally, each unit consists of a baseboard and a communication
module. The baseboard includes the power supply regulation and surge
protection. The communication module is a Telenetics™ Pony
Express™ Dial Modem Module.

The MIU PowerPort is packaged specifically for the harsh environments
found in utility substations, industrial facilities and remote sites. Though
functionally similar to commercial modems, the MIU PowerPort includes
special features that make it particularly well suited for utility and
industrial applications:

Environment: The MIU PowerPort has been designed specifically

for use in harsh environments. In addition to an
extended temperature range (-40 to +85º C), the MIU
includes surge, shock, vibration, and safety features
superior to those of conventional commercial
modems.

Power Supply: The MIU PowerPort can be powered from a range of

AC and DC power sources: +5 VDC, 12 VDC Battery,
7 to 16 VAC or 8 to 16 VDC. An optional 120 VAC
wall transformer is available from Telenetics.

Low Power: The MIU PowerPort dial modems can be configured

to enter into a “power down” mode. In this mode, an
MIU PowerPort will consume only a small fraction of
its active power while waiting for either controller or
telephone line activity.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 3

Industrial: The MIU PowerPort is packaged in a rugged, compact,

non-metallic (ABS) enclosure. Designed for
unmanned locations, the MIUs do not include the
array of pushbuttons and LEDs normally associated
with consumer-type modems to increase reliability
and decrease power consumption. Configuration is by
dip switches and/or software (“AT”) commands.
Standard industrial connectors for data, analog and
power interfaces allow reliable interconnection to
other industrial components.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 4

3. GENERAL PRODUCT SPECIFICATIONS

Dimensions: 5.3 x 4.0 x 1.375 inches
Weight: 1 lb

Voltage Supply: : 8 to 24 VDC
7 to 16 VAC, 50/60 Hz

Optional Wall Transformer 115 VAC, 50/60 Hz

Current Requirements: (See Section 4 for Power Down Modes)

MIU PowerPort 2.4:

12VDC 24VDC 125VDC 120VAC 220VAC

65mA 27mA 7.5mA 6.5mA 5.5mA

MIU PowerPort 9.6:

12VDC 24VDC 125VDC 120VAC 220VAC

115mA 57mA 11mA 10mA 9mA

MIU1 PowerPort 4.4:

12VDC 24VDC 125VDC 120VAC 220VAC

160mA 69mA 14mA 12mA 9mA

MIU PowerPort 28.8:

12VDC 24VDC 125VDC 120VAC 220VAC

205mA 125mA 16mA 15mA 11mA

Surge Protection: Power Supply: 8kVrms

Analog Line: 5kVac (MIU2.4 & 9.6)

3.75kVac (MIU14.4 & 28.8)
Digital Line: ESD ± 10kV

Operating Temperature: -40 to +85 deg C
Operating Humidity: 0 to 90% (non-condensing.)

Storage Temperature: -55 to 100 deg C
* Note: At temperatures below 0° F, an additional current drain of up to 350 ma
occurs as the internal proportional heater operates.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 5

4. POWER MODES

Mode Description Power

Consumption

Power On Factory Setting: Full power is always

available to the modem.

Sleep

Power Down

The power mode is set by a dip switch on the Pony Express Modem Module
inside the MIU case. Factory default is Power On mode. Other modes are set at
the factory before shipment if requested. Other modes can be set in the field ~ call
Telenetics for an instruction sheet.

If the modem is on hook for a
predetermined period (PE2400 = 5
seconds; PE2496, PE14.4 & PE28.8 =
software configured: Set S24 to desired
delay in seconds), it will drop to a low
current mode).

The modem will instantly “wake up” to
full power by either an incoming ring
signal or any transmit data (TxD) signal.

If the modem is on hook for 30 seconds,
it will automatically turn “off”.

The modem will automatically turn “on”
to full power within 400ms of receiving a
DTR signal or an incoming call.

See Section 3

Approx. 6mA

Approx. 20µA

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 6

5. MODEM SPECIFICATIONS

MIU2.4 MIU9.6 MIU14.4 MIU28.8

Standards V.22bis

V.22

Bell212A

Bell 103

Modem Line
Speed
(Asynch)

DTE Rates
above Modem
Line Speeds

Error
Correction &
Data
Compression

2400bps
1200bps

300bps

- 19200bps

- MNP 2,3,5

V.22bis

V.22

Bell212A

Bell 103

2400bps
1200bps

300bps

9600bps
4800bps

& 10
V.42

V.42bis

V.32bis

V.32

V.22bis

V.22

Bell212A

Bell 103

14400bps

9600bps
4800bps
2400bps
1200bps

300bps

57600bps
38400bps
19200bps

MNP 2,3,5

& 10
V.42

V.42bis

V.34

V.32bis

V.32

V.22bis

V.22

Bell212A

Bell 103

28800bps
19200bps
14400bps

9600bps
4800bps
2400bps
1200bps

300bps

115200bps

57600bps
38400bps
19200bps

MNP 2,3,5

& 10
V.42

V.42bis

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 7

6. POWER CONNECTIONS

DC Power Jack, 2.0mm – This standard concentric jack is provided to attach an

external power source in the range of 7 – 16 VAC or 8 – 24 VDC. The 2.0mm
Jack connects through a full wave bridge so either polarity is acceptable from the
DC source. The slide switch adjacent to the LED must be to the right side
(Toward the 2.0mm Jack).

DB – 25, Pin 10 – A DC voltage may be applied at the 25 pin data connector. DC
only with the positive lead connected to pin 10, and the negative lead connected to
Signal Ground on pin 7. This should be a regulated 5 VDC source. The slide
switch adjacent to the LED must be to the left side (Away from the 2.0mm Jack).
Internal jumper JP1 must be on pins 1-2.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 8

7. SERIAL DATA PORT PIN-OUTS

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 9

8. DIP SWITCH SETTINGS

Not Applicable – The dip switches are on the PE Module. Contact factory
for non – standard settings.
* NOTE: Opening the MIU for any reason voids the factory warranty.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 10

9. LED INDICATOR

The MIU has a single LED that will indicate the following conditions...

4 Blinking: POWER ON

4 Steady: MODEM CONNECTED (CARRIER DETECT)

10. AUTO RESET FEATURE

The dial-up modem modules inside your MIU include an “Auto Reset”
feature: If the modem configuration is lost for any reason, it can be
restored by dialing the modem and allowing it to ring 4 to 6 times.

The Auto Reset feature is enabled and disabled by a dip switch on the
modem module. Your MIU will have been shipped with the Auto Reset
mode active, unless otherwise specified at the time of ordering. Please
consult Telenetics if you wish to open up your MIU to disable Auto Reset.

11. AUTO DIAL FEATURE

The dial-up modem modules inside your MIU include a software
configured “Auto Dial” feature: Command AT\D1 will enable Auto Dial:
When DTR goes from an OFF to ON condition, and \D1 is set, the modem
will auto dial the phone number stored in location & Z0 (up to 45 digits).

Command \D0 (default) will disable the Auto Dial feature.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 11

12. OUTLINE DRAWING & MOUNTING

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 12

13. MODEM CONFIGURATION

Telenetics dial and leased line modems are based upon Rockwell chipsets.
These chipsets contain Rockwell’s “AT” command set.

A summary of the Rockwell command set for your MIU modem is
provided in Book 2.

Unless otherwise specified at the time of order, your modem will have left
the Telenetics factory in the configuration detailed on the following pages.

The Telenetics factory configuration differs from the Rockwell default
configuration as follows...

&C0 Rockwell Default Carrier Detect (CD) always ON.
&C1 Telenetics Factory Carrier Detect (CD) only ON

when modem connected (on hook)

S0=0 Rockwell Default Auto-Answer OFF
S0=1 Telenetics Factory Auto-Answer on first ring

You can review the configuration of your modem by entering AT&V
<CR>.

You can restore the Rockwell factory configuration by entering
AT&F&W

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 13

14. FACTORY CONFIGURATION ~ MIU2.4

ACTIVE PROFILE:

B1 E1 L2 M1 Q0 V1 X4 Y0 &C1 &D0 &G0 &J0 &L0 &P0 &Q0
&R0 &S0 &X0 &Y0 S00:001 S01:000 S02:043 S03:013 S04:010
S05:008 S06:002 S07:030 S08:002 S09:006 S10:014 S12:050
S14:AAH S16:00H S S18:000 S21:00H S22:76H S23:15H S25:005
S26:001 S27:40H S28:00H

STORED PROFILE 0:

B1 E1 L2 M1 Q0 V1 X4 Y0 &C1 &D0 &G0 &J0 &L0 &P0 &Q0
&R0 &S0 &X0 S00:001 S14:AAH S18:000 S21:00H S22:76H
S23:17H S25:005 S26:001 S27:40H S28:00H

STORED PROFILE 1:

B1 E1 L2 M1 Q0 V1 X4 Y0 &C0 &D0 &G0 &J0 &L0 &P0 &Q0
&R0 &S0 &X0 S00:000 S14:AAH S18:000 S21:00H S22:76H
S23:17H S25:005 S26:001 S27:40H S28:00H

TELEPHONE NUMBERS

&Z0=
&Z1=
&Z2=
&Z3=

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 14

14. FACTORY CONFIGURATION ~ MIU9.6

ACTIVE PROFILE:

B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 &Y0 S00:001 S01:000 S02:043 S03:013
S04:010 S05:008 S06:002 S07:050 S08:002 S09:006 S10:014
S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000
S38:020 S44:020 S46:138 S48:007 S95:000

STORED PROFILE 0:

B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 S00:001 S02:043 S06:002 S07:050
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:168 S41:195 S46:138 S95:046

STORED PROFILE 1:

B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 S00:001 S02:043 S06:002 S07:050
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:168 S41:195 S46:138 S95:000

TELEPHONE NUMBERS:
0= 1=
2= 3=

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 15

14. FACTORY CONFIGURATION ~ MIU14.4

ACTIVE PROFILE:

B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 &Y0 S00:001 S01:000 S02:043 S03:013
S04:010 S05:008 S06:002 S07:050 S08:002 S09:006 S10:014
S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000
S38:020 S44:020 S46:138 S48:007 S95:000

STORED PROFILE 0:

B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 S00:001 S02:043 S06:002 S07:050
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:168 S41:195 S46:138 S95:046

STORED PROFILE 1:
B1 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3
&Q5 &R1 &S0 &T5 &X0 S00:001 S02:043 S06:002 S07:050
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:168 S41:195 S46:138 S95:000

TELEPHONE NUMBERS:
0= 1=
2= 3=

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 16

14. FACTORY CONFIGURATION ~ MIU28.8

ACTIVE PROFILE:

B0 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D0 &G2 &J0 &K3
&Q5 &R1 &S0 &T4 &X0 &Y0 S00:001 S01:000 S02:043 S03:013
S04:010 S05:008 S06:002 S07:030 S08:002 S09:006 S10:014
S11:255 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000
S38:020 S46:138 S48:007 S95:000

STORED PROFILE 0:

B0 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D0 &G2 &J0 &K3
&Q5 &R1 &S0 &T4 &X0 S00:001 S02:043 S06:002 S07:030
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:105 S41:003 S46:138 S95:000

STORED PROFILE 1:
B0 E1 L1 M1 N1 Q0 T V1 W0 X4 Y0 &C1 &D0 &G2 &J0 &K3
&Q5 &R1 &S0 &T4 &X0 S00:001 S02:043 S06:002 S07:030
S08:002 S09:006 S10:014 S11:095 S12:050 S18:000 S36:007
S37:000 S40:105 S41:003 S46:138 S95:000

TELEPHONE NUMBERS:
0= 1=
2= 3=

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 17

15. DIAGNOSTICS

The following pages provide software and hardware techniques for
diagnosing communication problems and thereby isolating the problem at
either the local modem, the remote modem or the interconnecting line.

The following AT&Tn commands form part of the CCITT V.54 protocol
and can be used for diagnostic testing.

Note: &Tn commands can only be used when the modem is configured for
&Q0 <CR> (unbuffered/direct asynchronous mode).

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 18

&T0 TERMINATE TEST IN PROGRESS

If a V.54 loopback test is in progress as a result of executing an &Tn
command, then the &T0 command will cause that test to be terminated,
provided that the modem is in the command state or a V.54 state that
accepts commands from the DTE. See specific &Tn command
descriptions for termination actions.

&T1 INITIATE LOCAL ANALOG LOOPBACK (See Figure 2)

When the AT&T1 command is entered, the modem goes on hook and
configures itself for analog loopback. DSR is turned off (if &S1 is in
effect), the analog loopback state is entered, and the test timer is set to the
value in S18. A connect result code is sent to the DTE, and the test timer
then begins its count down. The test terminates when the test timer
expires. If S18 equals 0, then the test must be terminated by an &T0, H0,
or Z command. While any command may be entered while the modem is
in this test state, the modem response is not specified except for H0, &T0
and Z, any of which will terminate the test. Upon termination of the test,
the modem enters the command state.

RESULT CODE DESCRIPTION

CONNECT When local analog loopback state is

entered.

ERROR If any other &Tn test is active (except
&T0) or if in the on-line command
state.

OK After test is stopped by test timer, the
H0 command, or the &T0 command.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 19

&T2 NO FUNCTION

&T3 PERFORM LOCAL DIGITAL LOOPBACK (See Figure 3)

The modem must be in the command state with connection established

when this command is issued, otherwise an ERROR result code occurs.

The AT&T3 command establishes a loopback of received data, after

demodulation, and sends it back to the distant end. The modem is

configured for local digital loopback, DSR is turned off (if &S1 is in

effect), the test timer is started with the value in S18, and an OK result

code is sent to the DTE. If S18 contains a 0, the test must be terminated

by a &T0, H0, or Z command. The latter two result in the modem going

on hook. If S18 does not contain 0, the test is terminated after the number

of seconds stored in S18.

RESULT CODE DESCRIPTION

OK After 2 second delay

ERROR If any other self test is active (&T1,
&T6, &T7 or &T8) or if in idle state.
When test is terminated.

&T4 GRANT REMOTE DIGITAL LOOPBACK (RDL) REQUESTS

When in the on-line state, the modem will honor a remote digital

loopback request from a distant modem if it occurs. This will result in an

ERROR if the command is given while any V.54 test is active (&T1, &T3,

&T6, &T7 or &T8).

NOTE: There are data patterns that may cause a Remote Digital

Loopback conditions. Care should be given to the type of data being

received so that no RDL modes will be initiated.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 20

&T5 DENY RDL REQUESTS

The modem will not respond to a remote digital loopback request from a

distant modem. This will result in an error if the command is given while

any V.54 test is active (&T1, &T3, &T6, &T7 or &T8).

&T6 INITIATE REMOTE DIGITAL LOOPBACK (See Figure 4)

The command is valid only if the modem is in the command state with a

connection established.

Configure the modem under test with an AT&T4 command so that it will

honor a remote digital loopback request.

Enter AT&T6 at the local modem and it will send a remote digital

loopback request to the remote modem. After the RDL acknowledgement

signal is received from the remote modem, DSR is turned off (if &S1 is in

effect), the on-line state is entered, a CONNECT result code is sent to the

DTE, and the test timer is set to the value in S18.

If the local modem does not receive the RDL acknowledgment signal

from the remote end in three seconds, it sends an ERROR result code to

the DTE and returns to the command state. The local modem sends the

signal to release the remote digital loopback when the test is terminated.

The test may be terminated by the H0, Z, or &T0 command. The test will

also terminate when the test timer expires (sending the modem to the

command state) or carrier is lost (causing a NO CARRIER result code

and the modem to go on hook in the command state).

RESULT CODE DESCRIPTION

CONNECT When on-line state is entered.

ERROR If any V.54 test is active (&T1, &T3,
&T6-&T8).

ERROR If not in on-line command state.

ERROR If the RDL signal is not acknowledged.

&T7 INITIATE RDL WITH LOCAL SELF TEST (See Figure 5)

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 21

This is a system test, end to end.

The command is valid only if the modems are in the command state with a

connection established.

Configure the remote modem with an AT&T4 command so that it will

honor a remote digital loopback request.

Enter AT&T7 at the local modem and it will send a digital loopback

request to the remote modem. After the RDL acknowledgment signal is

received from the remote modem, DSR is turned off (if &S1 is in effect),

the on-line state is entered, an OK result code is sent to the DTE, and the

test timer is set to the value in S18. While the test is active, the local

modem sends a test message to the remote modem and counts the errors in

the received (looped back) signal. The modems stay in the command

state during the test. When the test is terminated (except by a loss of

carrier), the local modem sends the release signal to the remote modem, as

in &T6, and reports the three-digit error count to the DTE.

The information text is followed by an OK result code. The test is

terminated by loss of carrier, or an H0, &T0, or Z command, and by the

S18 timer running out.

RESULT CODES DESCRIPTION

OK When command executed is started.

OK After error count is sent to DTE (&T1,
&T3, &T6, &T7 or &T8).

ERROR If not in on-line command state.

ERROR If the RDL signal is not acknowledged.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 22

&T8 LOCAL LOOPBACK WITH SELF TEST (See Figure 6)

The modem should be on hook. Enter AT&T8 to configure the modem

for analog loopback and self test. The test timer is started at the time

indicated by S18, DSR is turned off (if &S1 is in effect). A self test

condition is entered, and an OK result code is sent to the DTE. During the

test the modem sends a test message and counts errors in the looped

back signal. The test is terminated when the timer times out (S18) or the

&T0, H0, or Z command is issued. When the test is terminated, the three

digit error count is sent to the DTE. An OK result code follows the error

count.

RESULT CODE DESCRIPTION

OK If a test state is entered.

OK After error count is sent to DTE

ERROR If any other V.54 test is active (&T1, &T3,

&T6, &T7), or if on-line.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 23

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 24

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 25

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 26

ADDITIONAL TEST / DIAGNOSTICS COMMANDS...

%L RECEIVED SIGNAL LEVEL

Returns a value (-dBm) which indicates the received signal
level at modem DATA PUMP interface. This value is
determined by the loss/gain of modem Telco Interface circuit
±dB at the Tip/Ring input to the modem. Typical value should
be -25dBm to -35dBm for most Telco connections.

%Q RECEIVED LINE SIGNAL QUALITY

Reports the line signal quality at the modem DATA PUMP
interface. This signal is also dependent on the DAA circuit
(Telco Interface). Returns the higher order byte of the EQM
(Eye Quality Monitor is the filter squared magnitude of the
error vector). Typical value should be below 10. The lower the
number, the better the performance from the modem.

ERROR response if NO connection to remote modem.

In &T1, modem %Q will be 0.

S86 CONNECTION FAILURE CAUSE

S86 can help determine the cause of a connection failure.
When the modem issues a NO CARRIER result code, a value is
written to this register. To read this register, following the
connection failure, issue ATS86? <CR>. The modem will
report one of the following values...

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 27

0 Normal hang up; no error occurred.

4 Physical carrier loss. (Loss of Carrier)

5 Feature negotiation failed to detect presence of another V.42

error-control modem at other end.

6 Other error-control modem did not respond to

feature negotiation message sent by this modem.

7 Other modem is synchronous-only; this modem is

asynchronous-only.

8 Modems could not find a common framing technique.

9 Modems could not find a protocol in common.

10 Feature negotiation message sent by other modem incorrect.

11 Synchronous information (data of flags) not received from

other modem.

12 Normal disconnect initiated by other modem.

13 Other modem did not respond after many transmissions of the

same message. Modem made 10 attempts then hung up.

14 Protocol violation occurred.

15 Compression failure.

Note: Multiple occurrences may contribute to a NO CARRIER
message; S86 records the first event that occurred.

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 28

NOTES:

MIU Installation, Operation & Diagnostics Edition: January 25, 1999 Page 29