Siemens Saturn Iie Epabx General Description Manual
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SATURN IlE EPABX Maintenance and Troubleshooting SEC?‘lON 1.00 INTRODUCTION 1.01 Purpose. This maintenance series practice provides step-by-step instructions for troubleshooting and repairing a malfunctioning SATURN IIE (SATURN II - Expanded) Elec- tronic Private Automatic Branch Exchange (EPABX) System. The information contained in this practice allows maintenance personnel to locate and correct malfunctions during precutover and postcutover of the system. Figures 1.00 and 1.01 illustrate the two cabinet configurations of the SATURN HE System. CAUTION Maintenance procedures on the SATURN IIE EPAEX must be performed only by Siemens certified personnel. Table 1.00 defines the mnemonics used in this practice. 1.02 Scope. The information contained in this practice is divided into the following four sections: a. Introduction b. Maintenance Overview c. Preventive Maintenance d. Troubleshooting and Repair Procedures A30808-X5130-DllO-l-8920 Issue 1, May 1986 1.03 Siemens SATURN HE Practices. The practices, issue numbers, and dates for the SATURN HE EPABX are listed in the Practices Documentation Index. A.30808X5130-AlgO- * -8987. NOTE: Always refer to the latest issue of the applicable in- dex to obtain the latest issue number of the practice. 1.04 Siemens Customer Support Services. Siemens maintains a nationwide network of field service offices. Con- tact the Siemens regional office for any engineering as- sistance which may be required. 1.05 What to Do in Case of Trouble with FCC-Registered Equipment. When trouble is experienced with FCC-registered equipment of the SATURN IIE EPABX, the procedures con- tained in this document should be followed, by qualified main- tenance personnel, to isolate and correct the malfunction. If spare equipment is not available, the telephone company must be notified that the equipment is faulty and this equip- ment must be disconnected from the public telephone net- work. The telephone company must also be notified when the faulty equipment has been repaired.or replaced and such equipment is reconnected to the public telephone network. l-l
SATURN IIE EPABX A30808-X5130-DllO-l-8920 Maintenance and Troubleshooting issue 1, May 1986 Figure 1.00 SATURN IIE System Basic Cabinet 1-2
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SATURN IiE EPABX Maintenance and Troubleshooting Table 1.00 Mnemonics Used in This Practice MNEMONIC DEFINITION AC6 Automatic Call Distribution ANA Assigned Night Answer ASCII American Standard Code for Information Interchange CE Common Equipment CIOP Controller/Input-Output Processor CMU Customer Memory Update co Central Office CONF Conference CRC Cyclic Redundancy Check CRT Cathode Ray Tube DCI Data Communications Interface DID Direct Inward Dialing DIP Dual lnline Package DISA Direct Inward System Access DIT Dedicated Incoming Trunk DP Dial Pulse DTE Data Terminal Equipment DTMF Dual-Tone Multifrequency DTR Data Terminal Ready DVM Digital Voltmeter EIA Electronics Industries Association EPABX Electronic Private Automatic Branch Exchange FDD Floppy Disk Drive HZ Hertz IRAM Input Random Access Memory I/O Input/Output LDN Listed Directory Number LED Light-Emitting Diode LRU Least Replaceable Unit LSI Large Scale Integration LTU Line/Trunk Unit LTUC Line/Trunk Unit Control LTUPS Line/Trunk Unit Power Supply MCA Memory Control and Attenuator MDF Main Distribution Frame MEM3 System Memory - 256 kilobyte MEM4 System Memory - 1 Megabyte MOS Metal Oxide Semiconductor MSI Medium Scale Integration MSL Main/Satellite Link MSM Memory Support Module MTCE Maintenance MTS Memory Time Switch ORAM Output Random Access Memory PABX Private Automatic Branch Exchange PCB Printed Circuit Board PEN Port Equipment Number P!MD Premium Instrument Module Digital PRS Protection Reload Signal PSC Parallel-to-Serial Converter PSU Power System Unit RAClRMW Ring AC/Ring Message Waiting RAUP Remote Access Unit/Ports RGEN Ring Generator RLT Release Link Trunk RMS Root-Mean-Square Amplitude RMTE ACT Remote Active SDT Siemens Digital Telephone SIB Signal Buffer SLA Subscriber Line Analog SLA16 Subscriber Line Module Analog - 16 Lines SLMA-0 Subscriber Line Module Analog - Off Premises 1-4
I - SATURN IIE EPABX Maintenance and Troubleshooting Table 1.00 Mnemonics Used in This Practice (Continued) A30808-X5130-DllO-l-8920 Issue 1, May 1986 MNEMONIC I DEFINITION SLMA-S SLMD SLT SMDR SMXTG T&R TM BA-2 TMBA-4 TMBM TMIE TMS TTY -48PS Subscriber Line Module Analog - Station Subscriber Line Module Digital Single-Line Telephone Station Message Detail Recording Signal Multiplexer/Tone Generator Tip and Ring 2-Wire E&M Trunk 4-Wire E&M Trunk Central Office Trunk Direct Inward Dialing Trunk Transmission Measuring Set Teletypewriter -48Vdc Power Supply l-5 (1-6 blank)
I - SATURN IIE EPABX Maintenance and Troubleshooting SECTION 2.00 MAINTENANCE OVERVIEW A30808-X5130-DllO-l-6920 Issue 1, May 1986 2.01 Introduction. This section describes the design con- siderations and maintenance facilities incorporated in the SATURN IIE EPABX. The maintenance concept for the EPABX is based on detecting and isolating failures to the Least Replaceable Unit (LRU), replacing the faulty LRU, and restor- ing normal service as soon as possible. The maintenance con- cept does not include the replacement of components on Printed Circuit Boards (PCBs). When a PCB is found to be defective, the PCB must be replaced and the original sent to the repair facility. configuration, the SATURN IIE System is housed in a Basic Cabinet-plus an Expansion Cabinet, which is mounted on top of the Basic Cabinet as shown in.Figure 1.01. The equipment cabinet(s) contain all functional units of the system. The sys- tem is divided into five functional blocks of circuits as shown in the block diagram of Figure 2.00. These functional blocks may be directly related to the system’s hardware groups. The functional blocks are as follows: a. Line/Trunk b. Switching c. Control d. Power e. Ancillary Equipment 2.02 General. In its basic configuration, the SATURN IIE System is housed in a single light-weight equipment cabinet, called the Basic Cabinet (shown in Figure 1.00). In its expanded ATTENDANT I CONSOLE pF-J ANCILLARY EQUIPMENT I ‘-J-j& . LTU SHELF I r------ ------__ BASIC SHELF 1 LINE/TRUNK _________ ~ I SWITCHING 1 NETWORK I I I COW OR TRUNK FOR REMOTE MAINTENANCE ===-I I ANCILLARY EQUIPMENT Figure 2.00 SATURN IIE System Block Diagram
SATURN IIE EPABX Maintenance and Troubleshooting A30808-X5130-DllO-I-8920 Issue 1, May 1986 2.03 Design Considerations. The design considerations in- corporated in the SATURN IIE EPABX are discussed below. a. Component Packaging. The SATURN IIE EPABX ar- chitecture is modularly designed to allow maintenance personnel to quickly recognize and isolate failures. Modularity is achieved primarily by using Large Scale Integration (LSI) and Medium Scale Integration (MSI) techniques. Extensive use of these technrques allows greater circuit density on each PCB thereby reducing the total number of PCBs in the SATURN IIE EPABX. b. Dependability. Dependability is the ability of the SATURN IIE EPABX to automatically test system func- tions; detect and analyze failures; reset and/or clear detected failures by attempting automatic recovery; and report reconfigurations and failures when automatic recovery is not possible. The primary objective of de- pendabili?y is to maintain the SATURN IIE EPABX in good operating condition and, when failures occur, to locate and identify such failures as soon as possible with minimal service effect to the customer. 2.04 Maintenance Facilities. Maintenance facilities are equipment and features which allow maintenance functions of the SATURN IIE EPABX to be performed. The maintenance facilities are listed below and described in the subsequent paragraphs. a. Power System Unit (PSU) b. Maintenance Phone c. Service Terminal d. Manual On-Line Diagnostic Tests e. Automatic On-Line Diagnostic Testing and Reporting f. Alarm Indicators and Classification g. Alarm Error Codes 2.05 Power System Unit. The Power System Unit (Figure 2.01) provides maintenance personnel central access to the system’s maintenance functions. The items discussed below are contained on the PSU to centralize its maintenance func- tions. Other items on the PSU, such as fuses and circuit break- ers. are discussed elsewhere in this document. a. ALARMS. The ALARMS indicator section consists of two light-emitting diode (LED) indicators which, when steadily lit, provide a visual status of alarm condition(s) existing in the system. The red LED is designated MAJOR for a major alarm condition and, when lit, in- dicates that the system is unable to process calls and failure transfer is enabled. The yellow LED is desig- nated MINOR for a minor alarm condition(s) and, when lit indicates at least one of the automatic on-line diag- nostic tests has detected a failure in the system; however, the system is still processing calls. b. FAILURE TRANSFER. The FAILURE TRANSFER sec- tion is a three-position switch with two associated LED indicators used to enable or disable, either automati- cally or manually, a customer-provided failure trans- fer relay subsystem. The failure transfer relays are external to the system and are designed to connect Central Office (CO) trunks to preselected stations in the event of a major alarm or power failure. During a major alarm or power failure, the Tip and Ring (T&R) leads of the preselected failure transfer stations are au- tomattcally switched, via the failure transfer relays (op- tionally provided by the customer), to the CO side of the trunk cable pairs at the Main Distribution Frame (MDF). This action allows the stations to originate and terminate calls. Note that a ground start button may be required on the preselected failure transfer station instrument(s) to allow origination of calls on ground start CO trunks. Maintenance-personnel can select one of the three following transfer modes: 1. AUTO. The Automatic (AUTO) mode, is the normal position for the FAILURE TRANSFER switch. Inthe event of major alarm or power failure, this mode automatically enables the failure transfer relays to connect the preselected failure transfer stations directly to the CO trunks and bypass the EPABX. Note that, while in this mode and in the event of a major alarm or power failure, no internal calls can be originated from the preselected failure transfer stations. 2. INHIBIT. The inhibit (INHIBIT) mode prevents the failure transfer relays from connecting the preselected failure transfer stations directly to the CO trunks that bypass the EPABX in the event of a major alarm. Al! the preselected failure transfer stations remain connected to their assigned sta- tion ports unless a power failure occurs, The failure transfer relays are operated by a power failure (pow- er failure transfer takes precedence over the inhibit mode). Note that the associated INHIBIT (yellow LED) indicator is steadily lit when the inhibit mode is selected. Also, when in the inhibit mode, the sys- tem’s optional remote major alarm indicator is dis- abled, except when a power failure occurs. The inhibit mode allows on-site maintenance person- nel to perform maintenance functicns without caus- ing a system failure transfer to occur or to falsely alert the optional remote alarm location. It is the responsibility of the on-site maintenance person- nel to monitor the system’s grade of service in the inhibit mode, to be sure its service quality has not deteriorated to a point where system failure trans- fer would be beneficial. 3. ACTIVE. The active (ACTIVE) mode forces the failure transfer relays to connect the preselected failure transfer stations directly to the CO trunks and bypass the EPABX. While in this mode, no in- ternal calls can be originated from the preselect- ed failure transfer stations; however, the other stations are not prevented from originating calls, providing that the EPABX is operational. Note that the associated red LED indicator is steadily lit when the active mode is selected. Also, when the active mode is selected, the optional system’s remote alarm location is alerted that the EPABX was bypassed by the system failure transfer circuits. c. MTCE PHONE. The Maintenance Phone (MTCE PHONE) section provides a modular jack which per- mits connection of the maintenance phone to the main- tenance line circuit of the EPABX. The maintenance line may be assigned to any Port Equipment Number (PEN). Usually PEN 0000 is assigned to the main- tenance phone. The T&R leads of the modular jack are brought out to the MDF for cross-connection to the as- signed main!enance line circuit. 2-Z
SATURN IIE EPABX A30808-X5130-DllO-l-8920 Maintenance and Troubleshooting Issue 1. May 1986 Fuses I Battery Test On Battery Power Battery Test LED (Red) +5V Adjust LED (Gr7en) Switch I Potentl]ometer Major LED Minor LED Active LED MTCE Phone (Red) Jack (Yellow) Switch Figure 2.01 Power System Unit, (PSU) Front View 2-3
A30808-X5130-DllO-l-8920 Issue 1, May 1986 SATURN IIE EPABX Maintenance and Troubleshootrng 2.06 Maintenance Phone. The maintenance phone can be either a portable test phone, test set, or a standard two-wire station instrument used to access the maintenance functions of the system, either locally or remotely. a. Local Maintenance Functions. The maintenance line is usually assigned as a Dual-Tone Multifrequency (DTMF) station type; however, a Dial Pulse (DP) or DTMF maintenance phone may be connected to it. Lo- cal interfacing of the maintenance phone with the main- tenance functions is achieved via the maintenance line circuit by connecting its line cord to either the desig- nated iack (i.e.. MTCE PHONE) on the PSU front oanel or the’ T&R leads of the PEN assigned and dross- connected at the MDF. Once interfaced, the main- tenance phone can access a repertoire of system and apparatus diagnostic test programs by dialing the maintenance diagnostic test access code (customer assignable via CMU procedures). During local maintenance functions, a hookswitch flash at any point in a test clears any diagnostic conditions, releases any resources, and returns the maintenance phone to the point where a test select code may be dialed. b. Remote Maintenance Functions. The maintenance phone, when used for remote (off-site) maintenance functions, must be assigned as a DTMF station type. In DP systems, a DTMF receiver must be assigned so that the maintenance phone can be used to commu- nidate with the system. Maintenance personnel at a re- mote area can gain access to the diagnostic test programs by dialing the directory number associated with the Direct Inward System Access (DISA) feature, an appropriate two- to four-digit authorization code, and the diagnostic test access code; or an attendant can complete an incoming call to the test number. During remote maintenance operations, the hookswitch flash signal cannot be sent over the public telephone network to the maintenance port; therefore, after each test is completed, maintenance personnel must redial the DISA trunk directory number in order to perform further tests. 2.07 Service Terminal. The service terminal is a customer- provided CRT or keyboard-printer data terminal. It provides further troubleshooting capabilities in addition to the main- tenance phone by interfacing, either locally or remotely, with the maintenance functions of the system via a dedicated data port. Once interfaced, the service terminal can be used to gain access to a repertoire of auditing routines and the failure history memory as well as performing CMU procedures. a. Local Maintenance Functions. The service terminal, when used for local (on-site) maintenance functions, must be equipped with an EIA RS-232-C interface. Lo- cal interfacing of the service terminal with the system’s maintenance functions is achieved via a dedicated data port by connecting its signal cable to the 25-pin W-232-C TTY connector on the front of the CIOP PCB (Figure 2.02). DIP switches on the CIOP PCB permit the baud rate to be set at 300, 1200, 2400, or 9600 baud. One or both of the TTY connectors on the front of the RAUP (Figure 2.03) may also be used for local maintenance functions. These interfaces (also RS-232-C compatible) are programmable to any of 15 baud rates between 50 and 9600 baud. The default baud rate is 9600. b. Remote Maintenance Functions.. The RAUP PCB (Figure 2.03) of the SATURN IIE System has a designed-in, serial modem port to facilitate communi- cation, via standard telephone lines, between a remote modem and terminal and the main system processor. This modem, which is answer-only and does not dial out, self-sets to either 300 baud or 1200 baud depend- ing upon the incoming baud rate. (The modem port and either or both of the two TTY ports of the RAUP may all be used simultaneously if desired.) A green Remote Active (RMTE ACT) LED on the RAUP lights steadily to indicate when the carrier detect signal is active on the modem accessed by the remote service terminal. The service terminal at the remote site must be equipped with an originating-type modem compatible with modem type 103 or 212A. Maintenance person- nel at a remote area can gain access to the system’s maintenance functions by: 1. Dialing the listed directory number for the system EPABX attendant and requesting the attendant (or ANA station user, if the system is in the niqht’mode) to extend to a station-number which-is cross: connected to the SLA port dedicated to the RAUP modem. 2. In systems equipped with Direct Inward Dialing (DID), dialing the DID extension number of a sta- tion which is cross-connected to the SLA port dedi- cated to the RAUP modem. 3. Dialing the listed directory number associated with the Direct Inward System Access (DISA) feature, a three- or four-digit authorization code, and the number assigned to a station cross-connected to the SLA port dedicated to the RAUP modem. 4. Dialing the listed directory number of a dedicated loop-start CO trunk circuit connected directly to the RAUP modem. Once the SLA circuit associated with the service terminal and the RAUP modem port has been accessed, the answer tone is heard when the handset assembly is to be placed in the data mode (e.g., placed in an acoustic coupler). Refer to the SATURN IIE EPABX Customer Memory Update (CMU) Proce- dures practice and the service terminal’s operating manual to coordinate proper operating procedures before any com- mand inputs are entered. 2-4
SATURN IIE EPABX A30808-X5130-DllO-l-8920 Maintenance and Troubleshooting issue 1, May 1986 I Figure 2.02 Controller/Input-Output Processor Printed Circuit Board (CIOP) 2-5