Adtran DSU 5600 User Manual

DSU 5600
Data Service Unit
USER MANUAL
61200.078L1-1D May 1997
901 Explorer Boulevard
P.O. Box 140000
Huntsville, AL 35814-4000
© 1997 ADTRAN, Inc.
All rights reserved.
Printed in USA.
FCC regulations require that the following information be provided in this manual:
1. This equipment complies with Part 68 of the FCC rules. On the bottom of the equipment housing is a label that shows the FCC registration number and Ringer Equivalence Number (REN) for this equipment. If requested, provide this information to the telephone company.
2. If this equipment causes harm to the telephone network, the telephone company may temporarily discontinue service. If possible, advance notification is given, otherwise, notification is given as soon as possible. The telephone company will advise the customer of the right to file a complaint with the FCC.
3. The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the proper operation of this equipment; advance notification and the opportunity to maintain uninterrupted service is given.
4. If experiencing difficulty with this equipment, please contact ADTRAN for repair and warranty information. The telephone company may require this equipment to be disconnected from the network until the problem is corrected, or it is certain the equipment is not malfunctioning.
5. This unit contains no user serviceable parts.
6. An FCC compliant telephone cord with a modular plug is provided with this equipment. In addition, an FCC compliant cable appropriate for the dial backup option ordered is provided with this equipment. This equipment is designed to be connected to the telephone network or premises wiring using an FCC compatible modular jack, which is Part 68 compliant.
7. The following information may be required when applying to the local telephone company for leased line facilities.
Service Digital Facility Service Order Network
Type Interface Code Code Jacks
56 kbps Digital Interface 04DU5-56 6.0F RJ-48S
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class A digital device, Pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio frequencies. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Shielded cables must be used with this unit to ensure compliance with Class A FCC limits.
Change or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
CANADIAN EMISSIONS REQUIREMENTS
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the interference-causing equipment standard entitled “Digital Apparatus," ICES-003 of the Department of Communications.
Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur: “Appareils Numeriques,” NMB-003 edictee par le ministre des Communications.
CANADIAN EQUIPMENT LIMITATIONS
Notice: The Canadian Industry and Science Canada 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, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equip­ment must also be installed using an acceptable method of connection. In some cases, the company's inside wiring associated with a single line individual service may be extended by means of a certified connector assembly (telephone extension cord). The customer should be aware 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 designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecom­munications company cause to request the user to disconnect the equipment.
Users should ensure for their own protection 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: Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection authority, or an electrician, as appropriate.
The Load Number (LN) assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device, to prevent overloading. The termination on a loop may consist of any combina­tion of devices subject only to the requirement that the total of the Load Num­bers of all devices does not exceed 100.
Table of Contents
Table of Contents

Table of Contents

Chapter 1. Introduction
General Description................................................................................................................ 1
Physical Description ............................................................................................................... 2
Front Panel ....................................................................................................................... 2
LED Identification .................................................................................................... 2
DTE Status (Green) ........................................................................................... 2
Network Status (Red) ....................................................................................... 2
Test Status/Error (Yellow/Red) ...................................................................... 3
Select and Test Buttons ............................................................................................ 3
Rear Panel ......................................................................................................................... 4
Chapter 2. Installation
Unpacking................................................................................................................................ 7
ADTRAN Shipments Include ........................................................................................ 7
Customer Provides .......................................................................................................... 7
Warranty and Customer Service .......................................................................................... 8
Powering .................................................................................................................................. 8
Configuration .......................................................................................................................... 8
DTE Rate and Scrambler - SW 1, SW 2, SW 3 .............................................................. 8
Loop Rate - SW 4 ............................................................................................................. 9
Clear To Send (CS) - SW 5 .............................................................................................. 9
Carrier Detect (CD) - SW 6 ........................................................................................... 10
Data Set Ready (SR) - SW 7 .......................................................................................... 10
Remote Digital Loopback (RDL) - SW 8..................................................................... 10
Network Connections ...........................................................................................................11
DTE Connections .................................................................................................................. 12
Chapter 3. Test Modes
Self Test ................................................................................................................................... 13
Near End Test ........................................................................................................................ 14
DTE Only Test ................................................................................................................ 14
DTE With Test Pattern (TP) ......................................................................................... 16
DTE and Loop Test (LL) ............................................................................................... 18
Loop Only Test .............................................................................................................. 20
Far End Tests ......................................................................................................................... 21
Remote Digital Loopback (RDL) ................................................................................. 21
61200.078L1-1 DSU 5600 User Manual i
Table of Contents
RDL With Test Pattern (TP) ......................................................................................... 21
Test Pattern (PTRN) ...................................................................................................... 22
Remote Tests .......................................................................................................................... 23
Chapter 4. Specifications Summary
Specifications and Features ................................................................................................. 25
Loop Interface .................................................................................................. 25
Line Requirements .......................................................................................... 25
Loop Rates ........................................................................................................ 25
Receiver Sensitivity ......................................................................................... 25
DTE Interfaces ................................................................................................. 25
DTE Data Rates................................................................................................ 25
DTE Operating Modes ................................................................................... 25
Diagnostics ....................................................................................................... 26
Power ................................................................................................................ 26
Environment .................................................................................................... 26
Index ....................................................................................................................................... 27
List of Tables
Table 2-A Switch Settings for DTE Async Rate .............................................................. 9
Table 2-B Network Connections......................................................................................11
Table 2-C Pin Assignments for Primary EIA-232 Connector ..................................... 12
List of Figures
Figure 1-1 DSU 5600 Front Panel ....................................................................................... 4
Figure 1-2 DSU 5600 Rear Panel ........................................................................................ 5
Figure 3-1 DTE Only Test Diagram ................................................................................. 15
Figure 3-2 DTE with Test Pattern Test Diagram ............................................................ 17
Figure 3-3 DTE and Loop Test Diagram ......................................................................... 19
Figure 3-4 Loop Only Test Diagram ................................................................................ 20
ii DSU 5600 User Manual 61200.078L1-1
GENERAL DESCRIPTION
The ADTRAN DSU 5600 is a technologically advanced, high performance Data Service/Channel Service Unit (DSU/CSU) that provides the interface between telco provided Digital Data Service (DDS) and the customer’s Data Terminal Equipment (DTE).
The DSU 5600 supports both 56 kbps and 64 kbps loop service rates and provides either synchronous or asynchronous modes of operation for the DTE interface. When the DTE interface is configured for synchronous operation, the DSU 5600 matches the selected loop rate. When the DTE interface is configured for asynchronous operation, it supports asynchronous data commu­nications over either a 56 kbps or 64 kbps DDS service. In asynchronous mode, the DTE can be configured to operate at any of the standard asynchronous communication rates from 1.2 kbps to 57.6 kbps. All setup or configuration is accomplished with a single eight position DIP switch that is accessible from the back panel of the unit.
Chapter 1. Introduction
Chapter 1
Introduction
The DSU 5600 has an industry standard EIA-232 interface provided on a 25 pin connector.
61200.078L1-1 DSU 5600 User Manual 1
Chapter 1. Introduction
PHYSICAL DESCRIPTION
The DSU 5600 is a stand alone unit designed to be used either on a desktop or mounted on a wall. The physical measurements of the DSU 5600 are:
Length = 8.32 inches Width = 6.50 inches Height = 1.56 inches Weight = 1.50 pounds
Front Panel
As shown in Figure 1-1, the front panel of the DSU 5600 contains eleven LED indicators that display DTE interface, network, and test status. These indicators are defined in the following section LED Identification.
LED Identification
DTE Status (Green)
INDICATOR DEFINITION SOURCE
RS Request To Send DTE
CS Clear To Send DSU TD Transmit Data DTE RD Receive Data DSU CD Carrier Detect DSU
The active state for the status indicators (RS, CS, and CD) is On; the On state for the data indicators (TD and RD) represents a SPACE condition.
Network Status (Red)
ALM On indicates a problem on the local loop or within
the DDS network. Off indicates a normal loop and network conditions.
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Chapter 1. Introduction
Test Status/Error (Yellow/Red)
DTE On indicates DTE interface test in progress.
Flashing indicates loop interface test (CSU Loopback)
has been initiated by the telco.
Loop On solid indicates loop interface test has been
initiated from local DSU. Flashing indicates loop interface test (CSU or DSU Loopback) has been initiated by the telco.
RDL On solid indicates remote digital loopback test has
been initiated from the local DSU. Flashing indicates remote digital loopback test has been initiated from the remote DSU.
PTRN On indicates integral pattern generator is being
utilized for testing.
Error On solid indicates remote digital loopback test has
been initiated from the local DSU. Flashing indicates remote digital loopback test has been initiated from the remote DSU.
For more information on the tests indicated by the indicators described previously see the chapter Test Modes.
Select and Test Buttons
The front panel also contains two push-button switches for selecting and controlling the various test modes for the DSU
5600.
Select Each time this switch is pressed the current test
mode is displayed by turning On one or more LEDs to indicate the specific test.
Test Once the desired test mode is displayed on the test
status indicators, the test is initiated by activating this switch. This switch is also activated to termi­nate any test in progress.
61200.078L1-1 DSU 5600 User Manual 3
Chapter 1. Introduction
CDRDTDCSRS ALM
DSU 5600
TEST
LOOPDTE
ERRORPTRNRDL
Rear Panel
SELECT
1
32 4 5
TEST
1. DTE Status LEDs
2. Network Status Indicator
3. Test Status/Error Indicators
4. Select Push Button Switch
5. Test (Start/Stop) Push Button Switch (Alternate Action)
Figure 1-1
DSU 5600 Front Panel
A drawing of the rear panel of the DSU 5600 is shown in Figure 1-2. The 25-pin connector labeled PRIMARY EIA-232 provides the synchronous/asynchronous DTE interface. Connection to the DDS network is made using the 8-pin modular jack (RJ-48S) labeled TELCO. The pin assignments for these connectors are listed in the sections Network Connections and DTE Connections.
All setup or configuration parameters for the DSU 5600 are selected with an eight position DIP switch that is accessible from the rear panel. This switch is labeled OPTIONS, and reference is made to the options chart on the bottom of the unit. The indi­vidual options are explained in detail in the section Powering.
A power cord is also shown on the rear panel of the DSU 5600. The captive power cord on the back panel provides connection to the AC/DC power supply.
4 DSU 5600 User Manual 61200.078L1-1
TELCO OPTIONS
TELCO OPTIONS
(LISTED ON BOTTOM)
(LISTED ON BOTTOM)
1234567812345678
12345678
1234567812345678
12345678
1234567812345678
12345678
PRIMARY EIA-232
PRIMARY EIA-232
Chapter 1. Introduction
115 VAC
115 VAC
60HZ .06A
60HZ .06A
Figure 1-2
DSU 5600 Rear Panel
61200.078L1-1 DSU 5600 User Manual 5
Chapter 1. Introduction
6 DSU 5600 User Manual 61200.078L1-1
UNPACKING
After unpacking the DSU 5600, carefully inspect it for shipping damages. If damage is suspected, file a claim immediately with the carrier and then contact ADTRAN Technical Support. If possible, keep the original shipping container for use in return­ing the unit to ADTRAN for repair or verification of shipping damage.
ADTRAN Shipments Include
Chapter 2. Installation
Chapter 2
Installation
The following items are included in ADTRAN shipments of the DSU 5600:
• The DSU 5600 unit
• Network interface cable (an 8-position modular to 8-position modular)
• The user manual
Customer Provides
The customer must provide an EIA-232 interface cable with standard 25-pin male D-type connectors (Cannon or Cinch DB­19604-432).
61200.078L1-1 DSU 5600 User Manual 7
Chapter 2. Installation
WARRANTY AND CUSTOMER SERVICE
For information regarding warranty and customer service see the inside cover of this manual.
POWERING
The DSU 5600 is equipped with a captive six-foot power cord that is terminated with a three-prong plug for connecting to a grounded power receptacle.
Ensure that a grounded, 115 VAC, 60 Hz receptacle is used for power­ing the DSU 5600.
When the DSU 5600 is plugged into an AC power source, it performs a SELF TEST that tests all LED indicators plus various circuit blocks within the unit. Proper operation plus failures are indicated via the LED indicators.
CONFIGURATION
The DSU 5600 has eight options for controlling the operation of both the network and DTE interfaces. These options are selected by setting individual switches on the eight position DIP switch that is accessible from the rear panel. A label of the switch settings and their respective options is attached to the bottom of the unit for convenience.
DTE Rate and Scrambler - SW 1, SW 2, SW 3
These three switches select the data rate for the DTE interface and enable or disable the scrambler. As shown in Table 2-A, combinations of up and down settings for these switches select specific data rates and enable or disable the scrambler.
When operating at 64 kbps synchronously in Frame Relay networks the scrambler must be disabled. When operating synchronously on a 64 kbps DDS loop not supporting Frame Relay the scrambler should be enabled.
8 DSU 5600 User Manual 61200.078L1-1
Loop Rate - SW 4
When the SW4 switch is in the down (56 kbps) position, the network interface of the DSU 5600 is configured for operation at 56 kbps, and when this switch is in the up (64 kbps) position, the network interface is configured for 64 kbps operation.
For 64 kbps clear channel operation, there is a possibility that the DTE data sequences might mimic network loop maintenance functions and erroneously cause other network elements to activate loopbacks. To prevent this, a data scrambler is enabled when the 64 kbps option is selected.
Chapter 2. Installation
Table 2-A
Switch Settings for DTE Rate
DTE Rate SW 1 SW 2 SW 3
1.2 and 2.4 kbps Async Down Down Down Sync, Scrambler Disabled Up Down Down
4.8 kbps Async Down Up Down
9.6 kbps Async Up Up Down
19.2 kbps Async Down Down Up
38.4 kbps Async Up Down Up
57.6 kbps Async Down Up Up Sync, Scrambler Enabled Up Up Up
Clear To Send (CS) - SW 5
When this switch is in the down (normal) position Clear To Send
(CS) follows the Request To Send (RS) lead with 250 µ ± 125 µ of
delay. The only exceptions to this occur when network or test conditions prevent data from being transferred over the DTE interface. During these conditions CS is turned Off.
For the up (On) position CS is forced On all the time.
61200.078L1-1 DSU 5600 User Manual 9
Chapter 2. Installation
Carrier Detect (CD) - SW 6
When this switch is in the down (normal) position, Carrier Detect (CD) is On any time customer data is being received and Off when the receive circuit is idle, (not carrying customer data).
When this switch is in the up (On) position, CD is forced On all the time.
Data Set Ready (SR) - SW 7
When this switch is in the down (On) position, Data Set Ready (SR) is forced On all the time. For the up (normal) position, SR is turned Off when the network is out of service or a test is in progress.
Remote Digital Loopback (RDL) - SW 8
When this switch is in the down (enable) position, the DSU 5600 accepts the industry standard V.54 Remote Digital Loopback (RDL) command from the far end of the circuit.
When this switch is in the up (disable) position, the DSU 5600 does not respond to a V.54 loopback command from the far end of the circuit.
10 DSU 5600 User Manual 61200.078L1-1
NETWORK CONNECTIONS
This interface consists of four leads paired to provide separate transmit and receive circuits. The four leads are provided on the eight position modular jack (RJ-48S) labeled TELCO on the rear panel of the DSU 5600. The pin assignments for this connector are shown in Table 2-B.
Pin
Number
1 Transmit Data (R) From Customer to Network Interface 2 Transmit Data (T) From Customer to Network Interface 3-6 Not Used 7 Receive Data (T-1) From Network Interface to Customer 8 Receive Data (R-1) From Network Interface to Customer
Chapter 2. Installation
Table 2-B
Network Connections
Function Signal Direction
61200.078L1-1 DSU 5600 User Manual 11
Chapter 2. Installation
DTE CONNECTIONS
The Data Terminal Equipment is attached to the connector labeled PRIMARY EIA-232 at the rear of the DSU 5600. The pin assignments for all pins used on this connector are shown in Table 2-C.
Table 2-C
Pin Assignments for Primary EIA-232 Connector
Pin
Number
1 A A Protective Ground (PG) 2 BA Send Data (SD) 3 B B Receive Data (RD) 4 CA Request to Send (RS) 5 CB Clear to Send (CS) 6 C C Data Set Ready (SR) 7 AB Signal Ground (SG) 8 CF Receive Line Signal Detector (CD) 9 - Not Used 10 - Not Used 11-14 - Not Used 15 D B Transmit Clock (SCT) 16 - Not Used 17 D D Receive Clock (SCR) 19-24 - Not Used
Function Signal Direction
A shielded EIA-232 cable is required to prevent possible radio fre­quency interference emissions.
12 DSU 5600 User Manual 61200.078L1-1
SELF TEST
Chapter 3. Test Modes
Chapter 3
Test Modes
In addition to a self test mode, other DSU 5600 test modes allow the user to isolate problems to specific components of the communications circuit. These various test modes for the DSU 5600 are initiated and terminated from the front panel using Select and Test.
When the DSU 5600 is powered on, all LEDs on the front panel turn On simultaneously for approximately two seconds then turn Off briefly. The LEDs then cycle On in pairs with a fan-out pattern away from the ALM indicator. Next, the LEDs cycle Off in pairs with a fan-in pattern back towards the ALM indicator. These patterns are repeated four times to determine that all LEDs are functioning properly.
At completion of the LED test patterns the PTRN LED is On, indicating the DTE with TP test is being performed. This test is successful if the Error indicator does not turn On. If the DTE with TP test fails, the RS, ALM, DTE, PTRN, and Error indica­tors all Flash.
If an EPROM CHECKSUM failure is detected during self test, CS, ALM, PTRN, and Error indicators Flash at the end of the self test.
61200.078L1-1 DSU 5600 User Manual 13
Chapter 3. Test Modes
NEAR END TEST
DTE Only Test
The local DSU 5600 is capable of performing the following near end tests:
• DTE Only
• DTE with Test Pattern
• DTE and Loop (LL)
• Loop Only (RT)
The DTE Only test provides a method for testing both the DTE interface of the local DSU 5600 plus its loop transmitter and receiver. For this test, the loop transmit data is connected to the loop receive data at a point close to the physical network inter­face. A block diagram illustrating the loopback point and the signal paths for this test is shown in Figure 3-1.
To initiate the DTE Only test, perform the following steps:
1. Press Select once to turn On the DTE test indicator.
2. Press Test while the test indicator is On.
To terminate this test, press Test.
Test data from the terminal or test equipment is routed through the DTE section of the DSU 5600 and then to the output of the loop transmitter section where the signal is encoded for trans­mission. The output of the loop transmitter is coupled back to the loop receiver input. This receive test signal is then decoded and returned to the terminal or test equipment where it is checked for bit errors.
14 DSU 5600 User Manual 61200.078L1-1
Chapter 3. Test Modes
DTE OR TEST EQUIPMENT INTERFACE
TD
RD
DTE
TRANSMIT
INTERFACE
DTE
RECEIVE
INTERFACE
DTE
ONLY
NETWORK
LOOP
TRANSMIT
INTERFACE
LOOP
RECEIVE
INTERFACE
INTERFACE
LOOP TX
LOOP RX
Figure 3-1
DTE Only Test Diagram
61200.078L1-1 DSU 5600 User Manual 15
Chapter 3. Test Modes
DTE with Test Pattern (TP)
The DTE with Test Pattern (TP) test is similar to the DTE Only test described previously. The DTE with TP test is initiated at the local DSU 5600 and is used to independently test the opera­tion of the DSU 5600.
To initiate the DTE with TP test, perform the following steps:
1. Press Select twice to turn On both the DTE and PTRN test indicators.
2. Press Test while these test indicators are On.
To terminate this test, press Test.
Instead of using data from the terminal or test equipment, this test utilizes an internal test pattern generator and detector built into the DSU 5600. The loopback point and the data paths for this test are illustrated in Figure 3-2.
The internal test pattern generator and detector of the DSU 5600 operate with a 2047 data pattern. When this test is initiated, the test pattern detector examines the receive data stream until synchronization to the 2047 pattern is achieved. Once synchro­nized, the detector continues to check the receive data and reports any bit errors detected by turning On the Error LED.
Once a test is initialized with the internal test pattern generator and detector, errors can be injected into the transmit data stream by pressing Select and observed by watching the Error LED turn On for a brief period of time.
As previously mentioned, the DTE with TP test is automatically performed during the self test sequence for the DSU 5600.
16 DSU 5600 User Manual 61200.078L1-1
DTE OR TEST EQUIPMENT INTERFACE
TD
RD
DTE
TRANSMIT
INTERFACE
DTE
RECEIVE
INTERFACE
TEST PATTERN
GENERATOR
TEST PATTERN
DETECTOR
DTE
WITH
TEST PATTERN
Chapter 3. Test Modes
NETWORK INTERFACE
LOOP
TRANSMIT
INTERFACE
LOOP
RECEIVE
INTERFACE
LOOP TX
LOOP RX
Figure 3-2
DTE with Test Pattern Test Diagram
61200.078L1-1 DSU 5600 User Manual 17
Chapter 3. Test Modes
DTE and Loop Test (LL)
The DTE and Loop test is initiated at the local DSU 5600 and allows independent testing of the separate sections of the DSU
5600. First, it allows the local DTE interface to be tested with data from the terminal or test equipment. Second, it allows the loop interface section of the local DSU 5600 to be tested from the remote site over the actual communications circuit. Testing from the remote end of the circuit is done with test data generated by the remote DSU or terminal type test equipment.
The DTE and Loop test splits the DSU 5600 into separate DTE and Loop interface sections and then loops the transmit data of each interface back to its respective receive data. A block dia­gram illustrating the loopback points and the signal paths for this test is shown in Figure 3-3.
To initiate the DTE and Loop test, perform the following steps:
1. Press Select three times to turn On both the DTE and Loop test indicators.
2. Press Test while these test indicators are On. The DTE and Loop LEDs Flash during initialization of the test and turn On solid once the test is in progress.
To terminate this test, press Test.
18 DSU 5600 User Manual 61200.078L1-1
Chapter 3. Test Modes
DTE OR TEST EQUIPMENT INTERFACE
NETWORK
DTE
TRANSMIT
TD
RD
INTERFACE
DTE
RECEIVE
INTERFACE
DTE AND
LOOP
LOOP
TRANSMIT
INTERFACE
LOOP
RECEIVE
INTERFACE
INTERFACE
LOOP TX
LOOP RX
Figure 3-3
DTE and Loop Test Diagram
61200.078L1-1 DSU 5600 User Manual 19
Chapter 3. Test Modes
Loop Only Test
The Loop Only test allows the loop interface and a major portion of the DTE interface of the local DSU 5600 to be tested from a remote site over the actual digital data circuit.
During the Loop Only test, the network receive data is looped to the network transmit data inside the DTE interface section of the DSU 5600. The physical DTE interface is ignored for this test. A block diagram illustrating the loopback point and the signal paths for this test is shown in Figure 3-4.
To initiate the Loop Only test, perform the following steps:
1. Press Select four times to turn On the loop test indicator.
2. Press Test while this test indicator is On. The Loop LED Flashes during initialization of the test and turns On solid once the test is in progress.
To terminate this test, press Test.
DTE OR TEST EQUIPMENT INTERFACE
TD
RD
DTE
TRANSMIT
INTERFACE
DTE
RECEIVE
INTERFACE
LOOP ONLY
LOOP
TRANSMIT
INTERFACE
LOOP
RECEIVE
INTERFACE
NETWORK INTERFACE
LOOP TX
LOOP RX
Figure 3-4
Loop Only Test Diagram
20 DSU 5600 User Manual 61200.078L1-1
FAR END TESTS Remote Digital Loopback (RDL)
When the remote digital loopback (RDL) test is initiated at the local DSU 5600, it commands the remote DSU into loopback with the industry standard V.54 loopback pattern. The loopback point and the signal paths for the remote DSU are the same as the Loop Only test for a local DSU (Figure 3-4). This loopback test is performed with data from the terminal or test equipment.
To initiate the RDL test, perform the following steps:
1. Press the Select switch five times to turn On the RDL test indicator.
2. Press Test while the test indicator is On. The RDL LED Flashes during initialization of the test and turns On solid once the test is in progress.
To terminate this test, press Test.
RDL with Test Pattern (TP)
Chapter 3. Test Modes
When the RDL with TP test is initiated at the local DSU 5600, it commands the remote DSU into loopback with the industry standard V. 54 loopback pattern. The loopback point and the signal paths for the remote DSU are the same as the Loop Only test for a local DSU (Figure 3-4). This loopback test is performed with data from the internal test pattern generator and error detector.
To initiate the RDL with TP test, perform the following steps:
1. Press Select six times to turn On both the RDL and PTRN test indicators.
2. Press Test while these test indicators are On. The RDL and PTRN LEDs Flash during initialization of the test and turn On solid once the test is in progress.
To terminate this test, press Test.
61200.078L1-1 DSU 5600 User Manual 21
Chapter 3. Test Modes
Test Pattern (PTRN)
When the PTRN test is initiated, the local DSU 5600 uses the integral test pattern generator to transmit a standard 2047 test pattern to the DSU On the far end of the circuit. The local DSU 5600 then examines the received data for the standard 2047 pattern. Once this pattern is detected the, Error indicator is turned Off. The Error indicator turns On when errors in the receive data pattern are detected. While this test is active, errors can be injected into the transmit data stream by pressing the Select push button.
To initiate the PTRN test, use the following steps:
1. Press the Select switch seven times to turn On the PTRN test
2. Press the Test switch while this test indicator is On. The
indicator.
PTRN LED Flashes during initialization of the test and turns On solid once the test is in progress.
To terminate this test, press the Test switch.
22 DSU 5600 User Manual 61200.078L1-1
REMOTE TESTS
Chapter 3. Test Modes
The DSU 5600 responds to three remote activated tests:
• Remote Digital Loopback (RDL)
• CSU Loopback (LL)
• DSU Loopback (RT)
The RDL test is initiated by a remote DSU and causes the local DSU 5600 to loopback. The loopback point is the same as the Loop Only point shown in Figure 3-4. This test is run to test the end-to-end performance of the circuit.
Both the CSU Loopback and the DSU Loopback tests are acti­vated from the telephone company diagnostic test equipment and are used to isolate trouble on a circuit.
The CSU Loopback, commonly called the LL test, has the same loopback points as the DTE and Loop test. It is used by the telephone company to test the integrity of the local loop.
The DSU Loopback, commonly called the RT test, has the same loopback point as the Loop Only test and is used by the tele­phone company to test the operation of both the local loop and DTE interface sections.
61200.078L1-1 DSU 5600 User Manual 23
Chapter 3. Test Modes
24 DSU 5600 User Manual 61200.078L1-1
Specifications Summary
SPECIFICATIONS AND FEATURES
This section describes the standard specifications and features incorporated in the DSU 5600.
Loop Interface
4-wire, full duplex
Line Requirements
Local loop specifications per AT&T Pub 62310
Chapter 4. Specifications Summary
Chapter 4
Loop Rates
56 kbps or 64 kbps
Receiver Sensitivity
-45 dB
DTE Interfaces
EIA-232 synchronous or asynchronous
DTE Data Rates
• 1.2 kbps, 2.4 kbps, 4.8 kbps, 9.6 kbps, 19.2 kbps, 38.4 kbps, or
57.6 kbps asynchronous
• 56 kbps or 64 kbps synchronous
DTE Operating Modes
Full or half duplex
61200.078L1-1 DSU 5600 User Manual 25
Chapter 4. Specifications Summary
Diagnostics
• Network test center activated
- CSU loopback on sealing current reversal in local loop
- DSU loopback
• User activated
- Self test
- Local loopback
- V.54 activated remote loopback with: 2047 test pattern DTE data/data from external test set
Power
115 VAC 4 Watts (maximum)
Environment
• Temperature
- Operating 0°C to 50°C (32°F to 122°F)
- Storage -20°C to 70°C (-4°F to 158°F)
• Relative Humidity up to 95%, non-condensing
26 DSU 5600 User Manual 61200.078L1-1
Index
Index
Symbols
2047 Test Pattern 16
A
ALM Indicator 2, 13
B
Back Panel 5
C
Carrier Detect 2, 10 CD Indicator 2, 10 Clear To Send 2 CS Indicator 2 Customer Service 8
D
Data Set Ready 10 Diagnostics 26 Digital Loopback Test 21
with Test Pattern 21
DTE
Operating Modes 25
DTE and Loop Test
Diagram 19 DTE Data Rates 25 DTE Indicator 2, 13, 16
DTE Interface 1, 2, 8, 25 DTE Only Test Diagram 15 DTE Status 2 DTE with Test Pattern 13
Diagram 17
E
Environment 26 Error
Indicator 3, 13, 16 Inject 16
F
Far End Test 21
I
Indicator
ALM 2, 13 CD 2, 10 CS 2, 9 DTE 2, 13, 16 Error 3, 16 LED 8 Loop Test 3 PTRN 3, 21, 22 PTRN test 16 RD 2 RDL 3, 10
61200.078L1-1 DSU 5600 User Manual 27
Index
Remote Digital Loopback 21 RS 2, 13 SR 10 TD 2
Inject Error 16
L
LED
Indicator 8
Test Pattern 13 Line Requirements 25 Loop Interface 25 Loop Interface Test 3 Loop Only Test 20 Loop Rate 25
N
Network Status
Indicator 2
O
Options 4
P
Parameters 4 Pattern
2047 16
Generator 3 Power 8, 26
Cord 5, 8 Primary EIA-232 12 Prom Checksum Failure 13 PTRN Test Indicator 3, 13, 16, 21, 22
R
RD Indicator 2 RDL Indicator 3, 10, 21 Rear Panel 4 Receive Data 2
Receiver Sensitivity 25 Remote
Digital Loopback Test 3 Request To Send 2 RS Indicator 2, 13
S
Select Switch 22 Self Test 8 SR Indicator 10 SW 1 8 SW 2 8 SW 3 8 SW 4 9 SW 5 9 SW 6 10 SW 7 10 SW 8 10 Switch
Options 4
Select 22
Test 3, 21
T
TD Indicator 2 Test
DTE Interface 2
Far End 21
Loop Interface 3
Loop Only 20
Pattern Detector 16
Pattern Generator 16
Remote Digital Loopback 3
Self 8
Status 2
Switch 3, 21, 22 Transmit Data 2
28 DSU 5600 User Manual 61200.078L1-1
Product Support Information
Presales Inquiries and Applications Support
Please contact your local distributor, ADTRAN Applications Engineering, or ADTRAN Sales:
Applications Engineering (800) 615-1176 Sales (800) 827-0807
Post-Sale Support
Please contact your local distributor first. If your local distribu­tor cannot help, please contact ADTRAN Technical Support and have the unit serial number available.
Technical Support (888) 4ADTRAN
Repair and Return
If ADTRAN Technical Support determines that a repair is needed, Technical Support will coordinate with the Return Material Authorization (RMA) department to issue an RMA number. For information regarding equipment currently in house or possible fees associated with repair, contact RMA directly at the following number:
RMA Department (205) 963-8722
Identify the RMA number clearly on the package (below ad­dress), and return to the following address:
ADTRAN, Inc. RMA Department 901 Explorer Boulevard Huntsville, Alabama 35806
RMA # _____________
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