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    							Siemens Practices A30808-X5130-AllO-l-8918 
    General Series Issue 1, May 1986 
    Issued by Office Systems Group 
    5500 Sroken Sound Boulevard N.W., Boca Raton, Florida 33431 
    Siemen.s Information Systems, Inc. (305) 994-8100 e Telex: 515052 
    ___- 
    Printed in U.S.A.  
    						
    							Siemens Practices 
    General Series 
    0 Siemens Information Systems, Inc., 1985 
    All rights reserved. 
    A30808-X5130-AllO-l-8918 . 
    Issue 1, May 1986 
    This material is proprietary to Siemens Information Systems, Inc. Any unauthorized 
    reproduction, use or disclosure of this material, or any part thereof, is strictly prohibited. 
    Siemens reserves the right to make changes in specifications at any time and without 
    notice. The information furnished by Siemens in this material is believed to be accurate 
    and reliable. However, no responsibility is assumed by Siemens for its use. 
    SATURN is a registered trademark of Siemens Information Systems, Inc.  
    						
    							SATURN IIE EPABX 
    A30808-X5130-AllO-l-B918 
    General Description 
    Issue 1, May 1986 
    CONTENTS 
    SECTION PAGE 
    1.00 INTRODUCTION ........................... l-1 
    Purpose .................................. l-l 
    Scope.. .................................. l-l 
    Siemens SATURN IIE Practices ................ l-l 
    Siemens Customer Support Services. ........... l-l 
    2.00 SYSTEM OVERVIEW. ........ 
    , ............ 2-1 
    General .................................. 2-1 
    Features ................................. 2-l 
    Hardware Description ....................... 2-3 
    Software Description. ....................... 2-7 
    System Capacities and Specifications .......... 2-7 
    3.00 SATURN IIE EQUIPMENT CABINET ........... 3-l 
    Cabinet Layout ............................. 3-1 
    Lineflunk Unit Shelf ........................ 3-5 
    Basic Shelf. ............................... 3-6 
    4.00 POWER SUPPLIES 
    ........................ 
    4-l 
    Main Power Section 
    ......................... 
    4-l 
    Power System Unit. 
    ......................... 
    4-l 
    Basic Shelf Power Supply 
    .................... 
    4-l 
    Memory Support Module 
    ..................... 
    4-l 
    Control Logic 
    .............................. 4-3 
    Ring Generator 
    ............................ 4-3 
    Power Supply Circuit Breakers. 
    ................ 4-3 
    Linemunk Unit Power Supply 
    .................. 
    4-3 
    4a-Volt Power Supply 
    ........................ 4-3 
    5.00 MISCELLANEOUS MODULE ASSEMBLIES 
    ..... 
    5-l 
    Floppy Disk Drive. 
    .......................... 5-l 
    6.00 PRINTED CIRCUIT BOARDS 
    ........ , ....... 6-1 
    Dimensions ................................ 
    6-l 
    Controller/Input-Output Processor 
    .............. 
    6-2 
    Signal Multiplexer/Tone Generator 
    .............. 6-2 
    Parallel/Serial Converter 
    ...................... 6-2 
    Memory Control and Attenuation 
    ............... 6-2 
    Conference. 
    ............................... 6-2 
    Memory .................................. 
    6-2 
    Dual-Tone Multifrequency Receiver. 
    ............. 
    6-2 
    Remote Access UniUPotis 
    .................... 6-2 
    Line/Trunk Unit Control 
    ...................... 6-3 
    Subscriber Line Module Analog - Station 
    ........ 
    6-3 
    Subscriber Line Module Analog - 
    Off-Premises Station 
    ....................... 6-3 
    Subscriber Line Module Analog - 16 Lines 
    ...... 6-15 
    Premium Instrument Module Digital 
    ............ 6-15 
    Subscriber Line Module Digital 
    ............... 6-15 
    Trunk Types. 
    .............................. 6-15 
    Two-Wire E&M Trunk. 
    ....................... 6-15 
    Four-Wire E&M Trunk 
    ....................... 6-15 
    Central Office Trunk 
    ........................ 6-15 
    Direct Inward Dialing Trunk. 
    .................. 6-15 
    7.00 SATURN IIE ANCILLARY EQUIPMENT 
    . , ... , ... 7-l 
    Service Terminal 
    ............................ 7-l 
    Attendant Console : 
    ......................... 
    7-3 
    8.00 STATION MESSAGE DETAIL RECORDING 
    .... , 
    . 8-l 
    General. 
    .................................. 
    a-i Call Record Items 
    .......................... 8-l 
    Special SMDR Messages 
    .................... 8-3 
    FIGURE 
    LIST OF FIGURES 
    PAGE 
    2.00 SATURN IIE System - Basic Cabinet Only 2-4 
    2.01 SATURN IIE System - Including 
    Expansion Cabinet . 2-5 
    2.02 SATURN IIE System Block Diagram 2-6 
    3.00 SATURN IIE Basic System - Front View . 3-2 
    3.01 SATURN IIE Expanded System - Front View 3-3 
    3.02 SATURN IIE Expanded System - Rear View 3-4 
    3.03 Linefiunk Unit Shelf . . . . . 3-5 
    3.04 Basic Shelf . . . . . . . . 3-6 
    4.00 Power Supplies . . . . . . . . 4-2 
    6.00 Controller/Input-Output Processor Printed 
    Circuit Board . . . . . . . . . . 6-4 
    6.01 Signal Multiplexer/Tone Generator Printed 
    Circuit Board . . . . . . . 6-5 
    6.02 Parallel/Serial Converter Printed Circuit Board . 6-6 
    6.03 Memory Control and Attenuation Printed 
    Circuit Board 
    6-7 
    6.04 Conference Printed ‘Circuit Board : : : : 1 1 : 1 1 1 : : : 1 6-8 
    6.05 Memory 3 (MEMB) Printed Circuit Board . 6-9 
    6.06 Memory 4 (MEM4) Printed Circuit Board 6-10 
    6.07 Dual-Tone Multifrequency Receiver 
    Printed Circuit Board . . . . 6-11 
    6.08 Remote Access Unit/Ports Printed Circuit Board 6-12 
    6.09 Line/Trunk Unit Control Printed Circuit Board . 6-13 
    6.10 Subscriber Line Module Analog - Station 
    Printed Circuit Board . . . . . . . . . 6-14 
    6.11 Subscriber Line Module Analog - Off-Premises 
    Printed Circuit Board . . . . . . . . . . 6-16 
    6.12 Subscriber Line Module Analog - 16 Lines 
    Printed Circuit Board . . . . . . 6-17 
    6.13 Premium Instrument Module Digital 
    Printed Circuit Board . . . . . 6-18 
    6.14 Subscriber Line Module Digital Printed 
    Circuit Board . . . . . 6-19 
    6.15 Two-Wire E&M Trunk (TMBA-2) Printed 
    Circuit Board . . . . . 6-21 
    6.16 Four-Wire E&M Trunk (TMBA-4) Printed 
    Circuit Board . . . 6-22 
    6.17 Central Office Trunk (TMBM) Printed 
    Circuit Board . . . 6-23 
    6.18 Direct Inward Dialing Trunk (TMIE) Printed 
    Circuit Board . , . . 6-24 
    7.00 Example of Administrative CMU Procedure 
    7-1 7.01 SATURN Attendant Console . . . : : : : : : 7-3 
    8.00 Example of SMDR Printout . . . . . . . 8-4 
    LIST OF TABLES 
    TABLE 
    PAGE 
    1.00 Mnemonics Used in This Practice 
    2.00 SATURN IIE Features - Alphabetica; Listing . l-l 
    by Major Categories . . . . . . . . 2-1 
    2.01 SATURN IIE System Capacities and Specifications . 2-8 
    2.02 Input/Output Impedance, Leak Resistance, 
    and Loop Characteristics , . . . . . . 2-13 
    2.03 SATURN IIE Supervisory Audible Tones . . 2-13 
    3.00 LTU Printed Circuit Boards on LTU Shelf and 
    Basic Shelf , . . . . . . . 3-6 
    3.01 Common Equipment Printed Circuit Boards . . 3-7 
    6.00 SATURN IIE Printed Circuit Boards . 6-l 
    6.01 Trunk Types Used in the SATURN IIE System 6-20 
    6.02 Trunk Signaling and Supervision . . . . . . . 6-20  
    						
    							SATURN IIE EPABX A30808-X5130-AllO-l-B918 
    General Description Issue 1, May 1986 
    SECTION 1.00 INTRODUCTlON 
    1.01 Purpose. This practice provides a general description 
    of the SATURN IIE digital Electronic Private Automatic Branch 
    Exchange (EPABX), including the hardware, software, tech- 
    nical characteristics, and functional block diagram. 
    1.02 Scope. Section 2 of this practice provides an overview 
    of the SATURN IIE System, including information on the hard- 
    ware and software configurations, plus data pertaining to sys- 
    tem features and characteristics. Sections 3 through 5 provide 
    information on the SATURN IIE System equipment cabinets 
    and shelves, and their related power supplies and module 
    assemblies. Descriptions of the various printed circuit boards 
    used in the SATURN IIE System are presented in Section 6. 
    Section 7 presents information on a standard service termi- 
    nal and the attendant console, and peripheral station equip- ment. Finally, Section 8 describes Station Message Detail 
    Recording (SMDR). Table 1.00 defines the common mnemon- 
    ics used in this practice. 
    1.03 Siemens SATURN HE Practices. The practices, issue 
    numbers and dates for the SATURN IIE EPABX are listed in the 
    Practices Documentation Index A30808-X5130-AlgO- * -8987. 
    NOTE: Always refer to the latest issue of the applicable in- 
    dex to obtain the latest issue number of a 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. 
    Table 1.00 Mnemonics Used in This Practice 
    MNEMONIC DESCRIPTION 
    ACC 
    ACD 
    ANA 
    ATT 
    AUD 
    ccs 
    CCSA 
    CIOP 
    CMU 
    co 
    CODEC 
    CONF 
    CPU 
    DCI 
    DEST 
    DID 
    DISA 
    DIT 
    DTMF 
    E&M 
    EPABX 
    EPSCS 
    FDD 
    FX 
    LCR 
    LDN 
    LED 
    LTU 
    LTUC 
    LTUPS 
    MCA 
    MDF 
    MMC 
    MEM3 
    MEM4 
    MSM 
    NAK 
    OPR 
    PCB 
    PCM 
    PFI 
    PIMD Access 
    Automatic Call Distribution 
    Assigned Night Answer 
    Attendant 
    Audible 
    Hundred Call-Seconds 
    Common Control Switching Arrangement 
    Controller/Input-Output Processor 
    Customer Memory Update 
    Central Office 
    Coder/Decoder 
    Conference 
    Central Processing Unit 
    Data Communications Interface 
    Destination 
    Direct Inward Dialing 
    Direct Inward System Access 
    Dedicated Incoming Trunk 
    Dual Tone Multifrequency 
    Receive and Transmit 
    Electronic Private Automatic Branch Exchange 
    Enhanced Private Switched Communications Service 
    Floppy Disk Drive 
    Foreign Exchange 
    Least Cost Routing 
    Listed Directory Number 
    Light Emitting Diode 
    Line/Trunk Unit 
    LineiTrunk Unit Control 
    Line/Trunk Unit Power Supply 
    Memory Control and Attenuator 
    Main Distribution Frame 
    Meet-Me Conference 
    Memory 3 (256K) 
    Memory 4 (1 Megabyte) 
    Memory Support Module 
    Negative Acknowledgement 
    Operator Call Queue Answer 
    Printed Circuit Board 
    Pulse Code Modulation 
    Power Failure Interrupt 
    Premium Instrument Module Digital  
    						
    							SATURN IIE EPABX 
    General Description A30808-X5130-AllO-l-8918 
    Issue 1, May 1986 
    Table 1.00 Mnemonics Used in This Practice (Continued) 
    MNEMONIC DESCRIPTION 
    PROM 
    PSC 
    PSU 
    RAM 
    RAUP 
    RCL 
    RGEN 
    RLS 
    RT 
    see 
    SDT 
    SLA16 
    SLMA-0 
    SLMA-S 
    SLMD 
    SMDR 
    SMXTG 
    SNAP 
    SPCL 
    SRC 
    TM BA-2 
    TM BA-4 
    TMBM 
    TMIE 
    TSU 
    UNA 
    WATS 
    ZUNA Programmable Read Only Memory 
    Parallel/Serial Converter 
    Power System Unit 
    Random Access Memory 
    Remote Access Unit/Ports 
    Recall Queue Answer 
    Ring Generator 
    Release Individual Party 
    Route 
    Specialized Common Carrier 
    Siemens Digital Telephone 
    Subscriber Line Module Analog - 16 Lines 
    Subscriber Line Module Analog - Off-Premises 
    Subscriber Line Module Analog - Station 
    Subscriber Line Module Digital 
    Station Message Detail Recording 
    Signal Multiplexerflone Generator 
    Special Night Answer Position 
    Special 
    Source 
    Two-Wire E&M Trunk 
    Four-Wire E&M Trunk 
    Central Office Trunk 
    Direct Inward Dialing Trunk 
    Time Switching Unit 
    Universal Night Answer 
    Wide Area Telephone Service 
    Zoned Universal Night Answer 
    1-2 (2 pages)  
    						
    							SATURN IIE EPABX 
    A30808-X5130-AllO-1-8918 
    General Description 
    Issue 1, May 1986 
    SECTION 2.00 SYSTEM OVERVIEW 
    2.01 General. The SATURN IIE System is a state-of-the-art, 
    digital, stored-program EPABX that uses Pulse Code Modu- 
    lation (PCM)/time division switching techniques. The system 
    is capable of supporting up to 992 ports (lines and trunks). 
    Analog-to-digital and digital-to-analog conversion is provid- 
    ed by a codec per port. The system provides extensive busi- 
    ness features previously found only in the largest private 
    telephone systems, plus a number of new innovative features. 
    The system can handle conventional telephones (rotary or 
    tone dialing) and can also be equipped with Siemens Digital 
    Telephones (SDTs). 
    2.02 Features. The SATURN IIE System is software- 
    controlled; therefore, it can be programmed by the customer 
    to allow for features desired in a particular application. This 
    flexibility allows the system to be arranged to operate with 
    attendant completion of incoming calls, Direct Inward Dial- 
    ing (DID), Dedicated Incoming Trunks (DITs), or any combi- 
    nation thereof. The features are assignable as: system-level; 
    station-, trunk-, or attendant console-related; and maintenance. 
    As the requirements of the customer change, the various fea- 
    tures may be assigned and/or reassigned among the users. 
    When additional features become available, each system may 
    be enhanced via easy-to-use Customer Memory Update 
    (CMU) procedures and/or new load program disks. Refer to 
    the Siemens practice, SATURN IIE EPABX Feature Descrip- 
    tions, for a comprehensive description of all features. A sum- 
    mary of these features is listed in Table 2.00. 
    Table 2.00 SATURN IIE Features 
    Alphabetical Listing by Major Categories 
    SYSTEM FEATURES 
    ACD Recorded Announcement Service 
    Additional Input/Output Devices 
    Alarm Indication - Major 
    Alarm Indication - Minor 
    Alternate Routing 
    Assigned Night Answer 
    Automatic On-Line Diagnostic Testing and 
    Reporting 
    Brownout Protection 
    Code Call Access 
    Convection Cooling 
    Customer Memory Updating 
    CCSA Access 
    Central Office (City) Trunk Access 
    Daytime Trunk Control 
    Dedicated Incoming Trunks 
    Dictation Access 
    Digital Pad Switching 
    Direct Inward Dialing 
    Direct Inward System Access 
    Direct Inward System Access - Shared 
    Direct Outward Dialing 
    DID Flexible Station Numbering 
    DTMF System Outpulsing 
    DTMF-to-Dial-Pulse Conversion 
    Eight-Digit Toll Code Restriction 
    End-to-End DTMF Signaling 
    EPSCS Access 
    External Extension Numbering SATURN IIE Features 
    by Major Categories (Continued) 
    SYSTEM FEATURES (Continued) 
    Fifteen-Digit Toll Code Restriction 
    Flexible Intercept Facilities 
    Flexible System Numbering Plan 
    FX Trunk Access 
    High Traffic Capacity 
    Incoming Class-of-Service Blocking 
    Least Cost Routing 
    Least Cost Routing with Provisions for 
    Specialized Common Carrier 
    Line Lockout - Attendant Intercept 
    Line Lockout - Automatic 
    Low Power Consumption 
    Manual On-Line Diagnostic Testing 
    Memory Support 
    Multiple Listed Directory Number 
    Music on Hold - Line or Trunk Access 
    Music on Hold - Paging 
    Music on Hold - System 
    Night Service Automatic Switching 
    Off-Premises Station 
    Power Failure Restart - Floppy Disk 
    Recall to ANA 
    Remote Alarm Identification 
    Remote Customer Memory Updating 
    Remote On-Line Diagnostic Testing 
    Remote Traffic and Feature Usage Measurement 
    Special Night Answer Position 
    Station Class-of-Service 
    Station Extension Numbering 
    Station Message Detail Recording 
    Station-to-Station Calling 
    Station-to-Station Class-of-Service Blocking 
    SMDR Account Codes 
    System Site ID 
    Tl Interface 
    Tandem Trunking 
    Tie Trunk Access 
    Traffic and Feature Usage Measurement 
    Trunk Group Class-of-Service 
    Trunk-to-Trunk Connections 
    Uniform Station Distribution Wiring 
    Variable Timing Parameters 
    Voice Mail Interface 
    Voice Paging Access - Zoned and Area 
    WATS Trunk Access 
    Zoned Universal Night Answer 
    ATTENDANT FEATURES 
    Alert Busy Attendant Indication 
    Attendant Control of Station Dial Restrictions 
    Attendant Selective Answering Priority 
    Automatic Recall on Camp-On 
    Automatic Recall on Hold 
    Automatic Recall on No Answer 
    Automatic Recall Redial 
    Busy Verification of Station Lines 
    Busy Verification of Trunks 
    Call Hold 
    2-l  
    						
    							!3QWRN IIE EPABX 
    General Description 
    Table 2.00 SATURN HE Features 
    A@habeticai Listing by Major Categories (Continued) 
    ATTENDANT FEATURES (Continued) 
    Call Type Display 
    Call Waiting Indication 
    Called Extension Status Display 
    Called Station Number Display 
    Called Trunk Number Display 
    Calling Station Number Display 
    Calling Trunk Number Display 
    Camp-On 
    Cfass of Call Exclusion - Key(s) 
    Cfass of Call Exclusion - Programmed 
    Conference 
    Console Operation 
    Control of Facilities 
    Control of SMDR Facilities 
    Digital Clock Display 
    BZErect Trunk Access 
    iT%rect Trunk Group Access 
    Extension of Calls 
    Flexible Key Assignments 
    linterGonsole Calling and Transfer 
    Locked Loop Operation 
    UR Route Number Display 
    Minor Alarm Identification 
    Night Service Control 
    Numerical Call Waiting Display 
    Override 
    Senderized Operation 
    Serial Calling 
    Special Account Code Entry - Single-Line Telephone 
    Special Overflow Answer Position 
    Switched Loop Operation 
    Trunk Flash Capability 
    Trunk Group Alphanumeric Display 
    Trunk Group Indicators 
    Volume Control - Audible Alert 
    Volume Control - Audio 
    STATION FEATURES 
    automatic Call Distribution 
    Add-On Conference 
    Attendant Override Security 
    Automatic Callback on Held Call 
    Call Forwarding - All Calls 
    Call Forwarding - Busy Lines 
    Call Forwarding - Fixed 
    Call Forwarding - No Answer 
    Gall Forwarding - Return 
    Call Forwarding - Secretarial 
    Call Forwarding to Public Network 
    Call Hold 
    Call Hold - Flip Flop (Broker) 
    (Call Park 
    Call Pickup - Directed 
    Call Pickup - Group 
    Call Tracing 
    Call Transfer 
    Call Transfer Security 
    Call Transfer with Automatic Camp-On 
    Call Waiting Indication 
    Consultation Hold 
    Data Line Security Table 2.00 SATURN IIE Features 
    Alphabetical Listing by Major Categories (Continued) 
    STATION FEATURES (Continued) 
    Dial Access to Attendant 
    Distinctive Ringing 
    Do Not Disturb 
    DTMF Dialing 
    Executive Override 
    Executive Override - Automatic 
    Executive Override Security 
    Executive Override Without Warning Tone 
    Hold to Attendant 
    Hot Line Service 
    Immediate Ringing 
    Internal Call Queuing - Callback 
    Internal Call Queuing - Standby 
    Last Number Redial 
    Meet-Me Conference 
    Message Waiting - Automatic Callback 
    Message Waiting - Cancellation 
    Message Waiting Capability 
    Mobile Authorization Codes 
    Multiline Pickup 
    Originate Only Service 
    Outgoing Call Queuing - Callback 
    Outgoing Call Queuing - Standby 
    Pilot Number Access 
    Rotary Dialing 
    Single-Line Telephone - Special 
    Account Code Entry 
    Speed Calling - Group 
    Speed Calling - Individual 
    Station-Controlled Conference 
    Station Forced Disconnect 
    Station Hunting - Busy Advance 
    Station Hunting - Circular 
    Station Hunting - No Answer Advance 
    Station Hunting - Secretarial 
    Station Hunting - Terminal 
    Stop Hunt 
    Terminate Only Service 
    SDT FEATURES 
    Abbreviated Ringing - Station Busy 
    Attendant Identification on Display 
    Automatic Answer 
    Automatic Intercom 
    Automatic Line Preference 
    Bridged Call 
    Call Forwarding Display 
    Call Park Location Number Display 
    Call Pickup Source Display 
    Call Privacy 
    Call Release 
    Call Transfer to Attendant 
    Call Waiting Display 
    Callback Number Display 
    Common Audible Ringing 
    Conference Mode Display 
    Dial Input Verification Display 
    Direct Station Selection 
    Direct Trunk Group Selection 
    Direct Trunk Selection 
    Duration of Call Display 
    ,
    						
    							SATURN IIE EPABX 
    General Description 
    Table 2.00 SATURN IIE Features 
    Alphabetical Listing by Major Categories (Continued) 
    SDT FEATURES (Continued) 
    Exclusive Hold 
    Executive Intercom 
    Feature Buttons 
    Forced Call Forwarding 
    Hands-Free Mute 
    Hands-Free Operation 
    I-Use indication 
    Incoming Call Display 
    Manual Hold 
    Manual Intercom 
    Message Waiting - Selective Automatic Callback 
    Message Waiting - Selective Cancellation 
    Message Waiting Source Display 
    Multiline Pickup 
    On-Hook Dialing 
    Pickup Buttons 
    Recall Identification Display 
    Saved Number Redial 
    Speed Calling - Individual List Display 
    Station-Defined Direct Dial 
    Station Ringer Cutoff 
    Station Senderized Operation 
    SMDR Account Code Display 
    Time-of-Day Display 
    Timed-Reminder Service 
    Voice Announce 
    2.03 Hardware Description. In its basic configuration, the 
    SATURN IIE System is housed in a single light-weight equip- 
    ment cabinet, called the basic cabinet (shown in Figure 2.00). 
    In its expanded configuration, the SATURN IIE System is 
    housed in a basic cabinet plus an expansion cabinet, as 
    shown in Figure 2.01. The equipment cabinet(s) contain all 
    functional units of the system. The system is divided into five 
    functional blocks of circuits as shown in the block diagram 
    of Figure 2.02. These functional blocks may be directly relat- 
    ed to the system’s hardware groups. The functional blocks 
    are as follows: 
    a. Line/Trunk 
    b. Switching 
    c. Control 
    d. Power 
    e. Ancillary Equipment 
    The LINE/TRUNK block circuitry is distributed between the 
    basic shelf and the Line/lirunk Unit (LTU) shelf or shelves. It 
    contains the interfacing circuitry for trunks, station lines, SDTs, 
    Dual-Tone Multifrequency (DTMF) receivers, and the 
    Line/Trunk Unit Control (LTUC) circuitry for LTU shelves. 
    All trunks (incoming and outgoing) are connected to appropri- 
    ate trunk circuits. (The trunk circuits carry various designa- 
    tions, depending on their type, such as: TMBA, TMBM, TMIE, 
    etc. These are described in Section 6 of this document.) The 
    trunk circuits interface two- and four-wire E&M, loop start, 
    ground start, and DID trunks to the system. 
    All conventional telephones (rotary dial and DTMF) are con- 
    nected to a Subscriber Line Module Analog - Station (SLMA-S 
    or SLA16) or Subscriber Line Module Analog - Off-Premises A30808-X5130-AllO-l-B918 
    Issue 1, May 1986 
    Station (SLMA-0). SDTs are connected to the system via Sub- 
    scriber Line Modules Digital (SLMD). Premium Instrument 
    Modules - Digital (PIMD) serve as special line interface cir- 
    cuits that connect attendant consoles to the system. The 
    DTMF receivers are used to detect and validate DTMF tones 
    and detect dial tone on outgoing trunk calls. 
    The LTUC multiplexes and demultiplexes both the signal and 
    the voice highways, and provides the timing signals neces- 
    sary to address the LTU circuits allocated in an LTU shelf. The 
    LTUC also provides the necessary interface to the CONTROL 
    and.SWlTCHlNG blocks from the LTU shelf LINE/TRUNK 
    block. The LTUC circuitry is not required in the basic shelf 
    because the line and trunks circuits there have direct access 
    to the CONTROL and SWITCHING blocks. Each LTU shelf 
    may be equipped with a maximum of two LTUCs. 
    The CONTROL and SWITCHING block circuitry is contained 
    in the basic shelf. The CONTROL block consists of the Sig- 
    nal Multiplexer/Clock/Tone Generator (SMXTG);the Signal 
    Buffer, Controller/Input-Output Processor (CIOP); the System 
    Memory (MEM3 and MEM4); the Remote Access Unit/Ports 
    (RAUP); two 5-l/4 inch Floppy Disk Drives (FDDs); and a TTY 
    service terminal interface. The CONTROL BLOCK circuitry 
    receives circuit status signals from the LINE/TRUNK block, 
    evaluates these signals, and determines what type of action 
    is required for the proper processing of the call in progress. 
    This can be one of a number of actions, such as setting up 
    a dial tone connection or interconnection of two circuits. The 
    command signals for the required action are sent to the 
    SWITCHING and LINE/TRUNK blocks for processing. 
    The SMXTG is divided into three functional parts: a signal 
    multiplexer, the system clock generator, and the tone gener- 
    ator. The signal multiplexer is a hardware-controlled scan- 
    ner/distributor that provides com’munication between the LTU 
    PCBs (via LTUCs, except for those located on the basic shelf) 
    and the CIOR The signal multiplexer also handles control and 
    status signals for the 32 speech highways, each of which has 
    32 time slots. The clock generator produces the 8.19 MHz, 
    4.096 MHz, 2.048 MHz, and 250 Hz clocking signals required 
    to properly operate the SATURN IIE System. The tone gener- 
    ator produces all of the required supervisory tones (e.g., dial, 
    busy, ringback, etc.), plus DTMF tones for system outdialing, 
    and provides timing windows for tone and dial pulse 
    cadencing. 
    The Controller/Input-Output Processor (CIOP) consists of the 
    Signal Buffer (SIB) and the main processor. It provides all of 
    the processor and input/output functions required of a basic 
    system. The SIB contains the circuitry that interfaces the sig- 
    nal multiplexer to the CIOP and also provides the interface 
    for the service terminal. The main processor directly provides 
    inputs to the FDD controllers and performs all system con- 
    trol functions. It uses Programmable Array Logic (PAL) and 
    contains Programmable Read-Only Memory (PROM), Ran- 
    dom Access Memory (RAM), a microprocessor, and a bus 
    clock. 
    The minimum system main Memory (MEM) is 1.25 megabytes, 
    consisting of one l-megabyte RAM module (MEM4) and one 
    256K RAM module (MEM3). The memory can be expanded 
    by using either MEM3 or MEM4 modules, depending on 
    memory capacity requirements. The memory functions are 
    controlled via a RAM controller and accessed via a 
    common 
    bus.  
    						
    							A~0808-X5130-A110-~-8918 
    Issue 1, May 1986  
    						
    							SATURN IIE EPABX 
    General Description A30808-X5130-AllO-l-B918 
    issue 1, May 1986 
    ANCILLARY 
    EQUIPMENT 
    LINE MODULE - 
    LINE/TRUNK 
    LTU SHELF 
    SUBSCRIBER 
    r-- ---- --------) 
    LINE/TRUNK 
    I 
    I 
    I 
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    A4931.l-4/3/66 Figure 2.02 SATURN HE System Block Diagram  
    						
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