DSU 56/64 Data Service Unit User Manual Part Number 1200062L1 61200062L1-1E May 2001
901 Explorer Boulevard P.O. Box 140000 Huntsville, AL 35814-4000 (256) 963-8000 © 2001 ADTRAN, Inc. All Rights Reserved. Printed in U.S.A.
The following conventions are used in this manual. Notes provide additional useful information. Cautions signify information that could prevent service interruption. Warnings provide information that could prevent damage to the equipment or endangerment to human life. Important Safety Instructions When using your telephone equipment, please follow these basic safety precautions to reduce the risk of fire, electrical shock, or personal injury: 1. 2. 3. 4.
Affidavit Requirements for Connection to Digital Services • An affidavit is required to be given to the telephone company whenever digital terminal equipment without encoded analog content and billing protection is used to transmit digital signals containing encoded analog content which are intended for eventual conversion into voice band analog signal and transmitted on the network.
Affidavit for Connection of Customer Premises Equipment to 1.
( ) D. In lieu of the proceeding training requirements, the operator(s)/maintainer(s) is (are) under the control of a supervisor trained in accordance with _______________ (circle one) above. I agree to provide ____________________ (telco’s name) with proper documentation to demonstrate compliance with the information in the preceding paragraph, if so requested.
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 applicable. If required, this information must be given to the telephone company. 2. The following information may be required when applying to the local telephone company for leased line facilities. 3. 4. 5. 6. 7. 8.
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.
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.
Limited Product Warranty ADTRAN warrants that for five (5) years from the date of shipment to Customer, all products manufactured by ADTRAN will be free from defects in materials and workmanship. ADTRAN also warrants that products will conform to the applicable specifications and drawings for such products, as contained in the Product Manual or in ADTRAN's internal specifications and drawings for such products (which may or may not be reflected in the Product Manual).
Customer Service, Product Support Information, and Training ADTRAN will replace or repair this product within five years from the date of shipment if the product does not meet its published specification, or if it fails while in service. A return material authorization (RMA) is required prior to returning equipment to ADTRAN. For service, RMA requests, training, or more information, see the toll-free contact numbers given below.
Identify the RMA number clearly on the package (below address), and return to the following address: ADTRAN Customer and Product Service 901 Explorer Blvd. Huntsville, Alabama 35806 RMA # _____________ Training The Enterprise Network (EN) Technical Training Department offers training on our most popular products. These courses include overviews on product features and functions while covering applications of ADTRAN's product lines.
Table of Contents List of Figures ...................................................................................................................... xv List of Tables ......................................................................................................................xvii Chapter 1. Introduction Product Overview ............................................................................................................... 1-1 Front Panel .................................................
Table of Contents Carrier Detect (CD) - SE 4 .................................................................................... 2-3 Down - Normal .............................................................................................. 2-3 Up - On ............................................................................................................ 2-3 Data Set Ready (SR) - SW 5 .................................................................................. 2-3 Down - On ...................
List of Figures Figure 1-1. Figure 1-2. Figure 3-1. Figure 3-2. Figure 3-3. Figure 3-4. 61200062L1-1 DSU 56/64 Unit .............................................................................................. 1-2 DSU 56/64 Rear Panel ................................................................................... 1-4 DTE Only Test Diagram................................................................................. 3-2 DTE with TP Test Diagram ......................................................
List of Figures xvi DSU 56/64 User Manual 61200062L1-1
List of Tables Table 2-1. Default Option Switch Settings .................................................................... 2-5 Table A-1. Pinouts for RJ-48S Network Connections .................................................. A-1 Table A-2. V.35 DTE Pinouts...........................................................................................
List of Tables xviii DSU 56/64 User Manual 61200062L1-1
Chapter 1 Introduction PRODUCT OVERVIEW The ADTRAN DSU 56/64, shown in Figure 1-1 on page 1- 2, 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 56/64 supports both 56 kbps and 64 kbps loop service rates with the DTE interface rate matching the selected loop rate. A synchronous V.35 interface is provided for the DTE interface.
Chapter 1. Introduction FRONT PANEL As shown in Figure 1-1, the front panel of the DSU 56/64 contains eleven light emitting diode (LED) indicators that display DTE interface, network, and test status. These indicators are defined in the LED Identification section, below. DSU 56/64 TEST RS CS TD RD CD ALM DTE LOOP RDL PTRN ERROR SELECT TEST Figure 1-1.
Chapter 1. Introduction Test Status/Error (Yellow/Red) DTE ON SOLID indicates DTE interface test in progress. FLASHING indicates Loop Interface test (CSU Loopback) has been initiated by 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 telco. RDL ON SOLID indicates remote digital loopback test has been initiated from the local DSU.
Chapter 1. Introduction REAR PANEL The rear panel of the DSU 56/64 is shown in Figure 1-2. PRIMARY V.35, a thirty-four pin connector, provides the synchronous DTE interface. The eight-pin modular jack (RJ-48S) labeled TELCO connects the DSU 56/64 to the DDS network. For pinouts to these connectors, see Table A-1, Pinouts for RJ-48S Network Connections, on page A-1 and Table A-2, V.35 DTE Pinouts, on page A-2. TELCO PRIMARY V.35 OPTIONS (LISTED ON BOTTOM) 1 2 3 4 5 6 7 8 115 VAC 60HZ .
Chapter 2 Installation UNPACK, INSPECT, POWER UP Carefully inspect the DSU 56/64 for any shipping damages. If damage is suspected, file a claim immediately with the carrier and then contact ADTRAN Customer and Product Service (CAPS). If possible, keep the original shipping container for use in returning the unit for repair or for verification of damage during shipment.
Chapter 2. Installation Power Up The DSU 56/64 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 56/64 unit. CONFIGURATION The DSU 56/64 has eight options for controlling the operation of both the network and DTE interfaces.
Chapter 2. Installation Antistream - SW 3 The Antistream option is used to select the antistream time out. The antistream time out is the maximum time the DSU 56/64 is allowed to transmit data from the DTE into the network. This feature prevents one DTE device on a multi-drop network from continuously tying up the transmit circuit from a remote DSU back to the master DSU. The antistream timer is reset to zero when RS transitions to the active state and is updated every second while RS is active.
Chapter 2. Installation Remote Digital Loopback (RDL) - SW 6 Down - Enable The DSU 56/64 accepts the industry standard V.54 RDL command from the far end of the circuit. Up - Disable The DSU 56/64 does not respond to the V.54 loopback command from the far end of the circuit. Loop Rate - SW 7 Down - 56 Kbps The network interface of the DSU 56/64 is configured for operation at 56 kbps. Up - 64 kbps The network interface is configured for 64 kbps operation.
Chapter 2. Installation Table 2-1. Default Option Switch Settings Switch Position Setting 1 2 3 4 5 6 7 8 Down Down Down Down Up Down Down Down Clear to Send (CS) Normal CS Delay Short Anti-stream Timer Off Carrier Detect (CD) Normal Data Set Ready (SR) Normal Remote Digital Loopback (RDL) Enabled Loop Rate 56 Kbps Scrambler Enabled NETWORK CONNECTIONS This interface consists of four leads that are paired to provide separate transmit and receive circuits.
Chapter 2.
Chapter 3 Test Modes In addition to a self-test mode, the DSU 56/64 has other extensive test modes which are designed to help isolate problems to specific components of the communications circuit. These various test modes for the DSU 56/64 are initiated and terminated from the front panel using the SELECT and TEST buttons. SELF TEST A self-test goes through the following cycle. 1. When the DSU 56/64 is powered on, all LEDs on the front panel turn on simultaneously for approximately two seconds. 2.
Chapter 3. Test Modes If an EPROM CHECKSUM failure is detected during self test, CS, ALM, PTRN, and ERROR indicators all flash at the end of the self test. NEAR END TESTS The local DSU 56/64 can perform the following near end tests: • DTE Only • DTE with Test Pattern • DTE and LOOP (LL) • Loop Only (RT) DTE ONLY TEST The DTE ONLY test can test both the DTE interface of the local DSU 56/64 plus its loop transmitter and receiver.
Chapter 3. Test Modes 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. 3. To terminate the test, press TEST. Test data from the terminal or test equipment is routed through the DTE section of the DSU 56/64 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.
Chapter 3. Test Modes Test Pattern Generator DTE or Test Equipment Interface DTE Transmit Interface 56/64 DSU Loop Transmit Interface TD Network Interface Loop TX DTE with Test Pattern RD Loop RX DTE Receive Interface Loop Receive Interface Test Pattern Detector Figure 3-2. DTE with TP Test Diagram The internal test pattern generator and detector of the DSU 56/64 operate with a 2047 data pattern.
Chapter 3. Test Modes 56/64 from the remote site over the actual communications circuit. Testing from the remote end of the circuit is performed with test data generated by the remote DSU or terminal type test equipment. The DTE AND LOOP test splits the DSU 56/64 into separate DTE and Loop interface sections and then loops the transmit data of each interface back to its respective receive data. Figure 3-3 illustrates the loopback points and the signal paths for this test.
Chapter 3. Test Modes LOOP ONLY TEST (RT) The LOOP ONLY test or REMOTE LOOPBACK test (RT) is used to test the loop interface and a major portion of the DTE interface of the local DSU 56/64 from the remote site over the actual digital data circuit. For the LOOP ONLY test, the network receive data is looped to the network transmit data inside the DTE interface section of the DSU 56/64. The physical DTE interface is ignored for this test.
Chapter 3. Test Modes FAR END TESTS Remote Digital When the RDL test is initiated at the local DSU 56/64, 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, shown in Figure 3-4 on page 3-6. This Loopback test is performed with data from the terminal or test equipment.
Chapter 3. Test Modes Test Pattern (PTRN) When the PTRN test is initiated, the local DSU 56/64 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 56/ 64 then examines the received data for the standard 2047 pattern. Once this pattern is detected and synchronization is achieved, the ERROR indicator is turned off. The ERROR indicator turns on when errors in the receive data pattern are detected.
Chapter 3. Test Modes REMOTE TESTS The DSU 56/64 responds to three remotely 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 56/64 to loopback. The loopback point is the same as the loop only point. See Figure 3-4 on page 3-6. This test is run to test the end-toend performance of the circuit.
Chapter 3.
Appendix A Pinouts Table A-1.
Appendix A. Pinouts Table A-2. V.
Appendix B Specifications SPECIFICATIONS AND FEATURES The DSU 56/64 is a single stand-alone unit designed to be used either on a desktop or mounted on a wall. This section describes the standard specifications and features incorporated in the DSU 56/64. Loop Interface • 4-wire, full duplex Line Requirements • Local loop specifications per AT&T Pub 62310 Loop Rates • 56 kbps or 64 kbps Receiver Sensitivity • -45 dB DTE Interfaces • V.
Appendix B. Specifications Diagnostics Network test center activated: • CSU loopback on sealing current reversal in local loop • DSU loopback User activated: • Self test, • Local loopback, • V.
Index A FCC regulations, vii features of DSU 56/64, B-1 front panel description and drawing, 1-2 LED identification, 1-2 test switches, 1-3 ACES help desk, xi affidavit connection for digital services, iv connection of CPE equipment, v antistream - SW-1, 2-3 Applications engineering how to contact, xi H help desk how to contact, xi C cables included with shipment, 2-1 provided by customer, 2-1 Canadian emissions requirements, viii Canadian equipment limitations, ix CAPS department how to contact, xi car
Index remote tests 3-9 repair and return information, xi RJ-48S network connections, pinouts, A-1 RMA requests xi S safety instructions, iii scrambler - SW-8, 2-4 self-test mode 3-1 service type information vii shipping damage what to do 2-1 shipping package contents of, 2-1 specifications B-1 DTE and Loop Test, 3-4 DTE with Test pattern test, 3-3 DTE-only test, 3-2 Far End Tests, 3-7 loop only test, 3-6 PTRN test, 3-8 remote digital, 3-7 remote tests, 3-9 self-test 3-1 test status/error LED identificati