Telecom switches (PBX and central office)



		Overview
		Suggested components
		Application notes
		New product announcements

Maxim > Solutions > Telecom switches (PBX and central office)

Application notes

App note 4721: The quick guide to layout considerations for the lithium-ion (Li+) battery simulator
App note 4701: Introduction to programmable logic controllers (PLCs) and the operational function of main system modules
App note 4700: Introduction to medical instruments and growing trend for point-of-care and near-patient testing
App note 4699: Overview of sensor signal paths
App note 4698: Introduction to dialysis machines
App note 4697: Overview of industrial motor control systems
App note 4694: Introduction to digital stethoscopes and electrical component selection criteria
App note 4691: Introduction to hearing aids and important design considerations
App note 4685: How continuous positive airway pressure (CPAP) respiratory ventilation systems function
App note 4679: Thermal Management Handbook
App note 4678: Advantages of Internet protocol (IP) cameras and H.264 compression for security and surveillance video
App note 4677: Important considerations for infusion pump and portable medical designs
App note 4671: Improve sensor performance and reduce SNR in pulse oximeter designs
App note 4613: A proposed framework for measuring, identifying, and eliminating clock and data jitter on high-speed serial communication links
App note 4486: Single-coil latching relay drivers
App note 4480: Precision constant-current sink provides wide, close-to-the-rail compliance
App note 4450: Getting Started with the MAX6651 Fan Controller
App note 4432: Isolated Temperature Sensor
App note 4413: Sequencing Circuit Provides Pseudo Voltage Tracker
App note 4352: HFRD-39.0: 40Gbps, Quad-SFP Half-Active Copper Cable Assembly
App note 4326: Reduce Standby Power Drains with Ultra-Low-Current, Pulse-Frequency-Modulated (PFM) DC-DC Converters
App note 4322: Simplified lithium-ion (Li+) battery-charger testing
App note 4289: Low-Temperature Data Retention in Nonvolatile SRAM
App note 4270: High-voltage watchdog timers enhance automotive system safety
App note 4245: Three Approaches to Creating Negative Low-Voltage Hot-Swap Circuits
App note 4240: Active High-Voltage Transient Protectors Trump Conventional Approaches in Automotive Electronics
App note 4233: Carrier Ethernet Service Demarcation in Optical Networks
App note 4228: A Five-Channel (Three +V and Two -V) Hot-Swap Reference Design
App note 4223: The evolution of the RS-232 transceiver
App note 4139: HFRD-32.0: Quad-SFP Host Adapter
App note 4138: HFRD-31.0: 20Gbps, Quad-SFP Active Copper Cable Assembly
App note 4124: DS33X162 Product Family FAQ
App note 4118: DS33R11 Multichip-Module BSDL Testing
App note 4108: SPST Bipolar Power Switch Simplifies Power-Supply Testing
App note 4094: HFRD-30.1: SFP+ Host Board
App note 4081: Alternate Circuits for Overvoltage Protection: Tips and Tricks
App note 4070: Transmitting I²S Audio Streams in Automotive Applications Using the MAX9205/MAX9206 LVDS SerDes
App note 4059: DS33R41 Multichip-Module BSDL Testing
App note 4033: Programmable Fan Controllers
App note 4024: SPI/I²C Bus Lines Control Multiple Peripherals
App note 3983: Designing Single-Switch, Resonant-Reset, Forward Converters
App note 3968: How to Use the Bit-Error-Rate Tester (BERT) on the DS2652x STCs
App note 3954: Characteristics of Manganese Lithium (ML) Batteries
App note 3951: Power-Save Mode Reduces Power Consumption When Driving Relays
App note 3939: DC-DC Controllers Use Average-Current-Mode Control for Infotainment Applications
App note 388: Hitless Protection Switching with 1+1 Redundancy
App note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors
App note 3921: Using a DS1307 with a PIC Microcontroller
App note 3918: User's Guide for the MAX6877 Power-Supply Tracker/Sequencer
App note 3917: The MAX6876 Power-Supply Tracker/Sequencer User Guide
App note 3912: Low-Cost, Complete Power Solution for Powered Devices Includes a 12V Buck Converter
App note 3901: Synchronizing Multiple High-Speed Multiplexed DACs for Transmit Applications
App note 3899: Frequency Calculator for the DS1086L
App note 3896: HFTA-14.0 Design Challenges of GPON FEC Receivers
App note 3890: Using the DS28CZ04 in an Active Copper SFP Cable Assembly
App note 3883: Practical Considerations for Advanced Current Sensing in High-Reliability Systems
App note 3872: Telecomm Supply Powers Temperature Sensor
App note 3867: Shunt Regulator Improves PA's Current-Limit Accuracy
App note 3864: The FET-OR Connection for Power Supplies
App note 3849: Ethernet-over-PDH Technology Overview
App note 3834: HFTA-13.0: Designing External Cabling for Low EMI Radiation
App note 3827: Initialization and Configuration of the DS26528 Transceiver
App note 3816: Selecting a Backup Source for Real-Time Clocks
App note 3811: Simple Devices for Meeting Voltage Tracking Requirements
App note 3778: Problems and Solutions for Adjusting to Changes in Daylight Saving Time
App note 3766: HFTA-12.0: Measuring crosstalk penalty in high-speed bidirectional serial communication modules
App note 3763: Measuring and Improving Return Loss on the DS317x and DS318x T3/E3/STS-1 LIUs
App note 3760: Interleaved Bus Operation
App note 3759: Timing Considerations When Using NVSRAM
App note 3756: High-IOUT LDO Regulator Has Excellent Transient Response
App note 3718: DS26528 and DS26524 Transmit Pulse Control
App note 3705: DS3112 LRCLKx Low Speed Clock Recovery Operation
App note 3694: How to 'Center' a Down-Dithering EconOscillator
App note 3693: Why Maxim Chose to Design the Single-Piece NV SRAM Modules
App note 3686: DS2155 and DS26521 Software Comparison
App note 3670: Measuring Return Loss Using the Advantest R3132 Spectrum Analyzer
App note 3647: HFRD-10.4: 1244Mbps/1244Mbps GPON ONT with Video Overlay
App note 3641: Migrating to the MAX6642 from Other Thermal Diode Temperature Sensors
App note 3610: DS21458 Quad and DS26528 Octal Transceiver Software Comparison
App note 3609: Clock-Rate-Adapter (CLAD) Features for DS325X, DS316X, DS317X, and DS318X
App note 3604: JJ-20.11-Compatible Interface for the DS2155 and DS21455 SCTs
App note 3582: Replacing Crystals and Ceramic Resonators with Silicon Oscillators
App note 3572: FAQ about the integrated-crystal package option
App note 3567: Monitoring and Sequencing Supply Voltages in High-Reliability Systems
App note 3557: "Stitch" Your Way Out of Logic-Analyzer Memory Limitations
App note 3556: Configuring Dallas Semiconductor LIUs Without a Microcontroller
App note 3547: Measuring Return Loss on T3/E3/STS-1 LIUs
App note 3539: A 50 Watt Internal Bus Architecture (IBA) Power Supply
App note 3530: Circuit Converts PWM Fan Drive to Linear and Reduces Acoustic Noise
App note 3512: Automotive Applications for Silicon Spread-Spectrum Oscillators
App note 3510: Interfacing a DS1305 RTC with an 8051-Type Microcontroller
App note 3507: IEEE 802.3af-Compliant Single-Port, Power-Sourcing-Equipment Application
App note 3502: Effect of PC Board Trace Width on Remote-Diode Temperature-Sensor Accuracy
App note 3496: HFRD-10.2: 622Mbps/1244Mbps GPON ONT
App note 3495: Combine Multiple Data Files to Optimize INL/DNL Processing
App note 3494: The basics of anti-aliasing: using switched-capacitor filters
App note 3493: System-Management IC Meets Monitoring and Sequencing Requirements in Multivoltage Systems
App note 3491: Schematic and Layout Guidelines for High-Speed Data Converters
App note 3488: EEPROM Programming Instructions for DS33Z11/DS33Z44
App note 3457: IR-Linked Temperature Sensor
App note 3456: Programmable System-Management IC Monitors and Sequences Requirements in Complex, Multivoltage Systems
App note 3455: HFTA-11.0: Spectral Content of NRZ Test Patterns
App note 3451: HFRD-16.0: 1Gbps to 4.25Gbps Active Copper SFP Cable Assembly
App note 3424: RS-232 Powered Temperature Sensor
App note 3422: DS26502 Hardware Mode
App note 3412: TINIS400 External Serial Port Reference Design
App note 3411: DS33Z11 - Ethernet LAN To Unframed T1/E1 WAN Bridge
App note 3410: Guidelines for Laying Out T3 and E3 Network Interfaces
App note 3387: HFRD-08.0: 10Gbps (4x2.5Gbps) Active Copper Cable Assembly
App note 3363: New Ethernet Systems Distribute DC Power with Data
App note 3361: Using the MAX6650 and MAX6651 Fan Speed Regulators with 24V and 48V Fans
App note 3360: DS2155 and DS26502 Software Comparison
App note 3357: DS2155 To DS21458 Migration
App note 3351: T3/E3/STS-1 Low Cost Repeater
App note 3349: T1/E1 Loopback Operation for Dallas Semiconductor T1/E1/J1 transceivers
App note 3345: Examples of DS31256 Applications
App note 3344: DS31256 -- T3/E3 MUX/DS3112 Hardware Connections
App note 3328: Minimize Short-Circuit Current Pulse in Hot-Swap Controller
App note 3317: Adding Windows NT/2000/XP Support to the AN3315 Parallel-Port 2-Wire Software
App note 3315: Writing Parallel-Port 2-Wire Software in C
App note 3313: Interfacing a DS1390/DS1391 RTC with a Motorola DSP with SPI
App note 3292: Crunching FFTs with Microsoft® Excel
App note 3288: IC Drives Up to Four Single-Coil Latching Relays
App note 3263: Connecting the Agere Supermapper™ Device Family to Dallas T3 LIUs
App note 3229: Selecting temperature sensors for system measurement and protection
App note 3228: Improving Gain Flatness without Sacrificing Dynamic Performance in High-IF ADCs
App note 3227: Power-On Reset and Related Supervisory Functions
App note 3208: Elastic Store Operation
App note 3193: MAX3983: Designing for 10Gbase-CX4 Transmitter Template Compliance with the MAX3983
App note 3190: Coherent Sampling Calculator (CSC)
App note 3178: Extended-Range Temperature-Sensing ICs
App note 3173: Automatic fan control techniques: trends in cooling high-speed chips
App note 3149: Circuit Converts PWM to Amplified and Buffered Linear Signal
App note 3131: Connecting the Agere Ultramapper Device Family to Dallas T3/E3 LIUs
App note 3121: Selecting a T1/E1/J1 Single-Chip Transceiver
App note 3111: Interfacing the DS3144 Framer with the DS3154 LIU
App note 3062: Dynamic Performance Requirements for High-Performance ADCs and RF Components in Digital Receiver Applications
App note 2931: HFTA-09.0: T3/E3/STS-1 Fiber Optic Extension
App note 2913: Hot-Swap Controllers Improve Power-Supply Sequencing
App note 2884: Secondary-Side Transformer Termination Improves Gain Flatness in High-Speed ADCs
App note 2877: Modifying the pulse shape of DS315x using Test Registers
App note 2863: The Effects of Adjusting the DS1086L's Dither Span and Dither Frequency on EMC Measurements
App note 2857: T1/E1/J1, N+1 redundancy with analog switches
App note 2853: Supervisors in Multivoltage Systems
App note 2833: Interfacing an SPI RTC with a Motorola DSP
App note 2765: Flexible Fault Protection
App note 2736: Understanding, Using, and Selecting Hot-Swap Controllers
App note 2731: DS2155, DS21Q55, DS2156 Programming SLC-96
App note 2722: Interfacing the DS2156 Utopia II Bus to Maxim Demo Kits
App note 2713: Switching Frame Mode In Live T1 Systems
App note 2706: Bit Error Rate Testing the DS314x Series of DS3/E3 Framers
App note 2704: MAX3983: Equalize 10Gbase-CX4 and Copper InfiniBand Links with the MAX3983
App note 2696: Redundancy Protection for T3/E3/STS-1 Networks
App note 2400: A Compact 36-72V DC Input, 3.3V/10A Output Power Supply
App note 2391: Dual Voltage Tracking Circuit for I/O, Microprocessor, and DSP Core Voltages
App note 2378: Handy Circuit Gives Systems Flexible Fault Protection
App note 2361: Interfacing an SPI-Interface RTC with a PIC Microcontroller
App note 2160: Using the MAX8515 Shunt Regulator In Output Overvoltage Sensing Applications for DC-DC Converters
App note 2158: Advantages of IC-based hot-swap circuit protection
App note 2154: Microcontroller Clock—Crystal, Resonator, RC Oscillator, or Silicon Oscillator?
App note 2141: Determining Clock Accuracy Requirements for UART Communications
App note 407: DS2148/DS21348 Hardware Mode
App note 406: DS21Qx5y BSDL Scan Chain Mapping
App note 403: DS2155 and DS26401 Software Comparison
App note 405: Power-Fault Protection Layout
App note 404: Modifying the E3 Template Compliance of the DS3150, DS315x and DS325x
App note 2043: A Compact, Isolated Power Supply, 48V to 3.3V at 7A
App note 2040: 50W Current-Mode Forward Converter Design with the MAX8540
App note 2039: 50W Voltage-Mode Forward Converter Design with the MAX8541
App note 2023: LVDS Serializer-Deserializer Performance over Twisted Pair Cable
App note 520: Using a Watchdog Timekeeping RAM with a Microcontroller
App note 1995: Using Spread Spectrum Oscillators to Reduce Radiated Emissions in Consumer Products
App note 1993: MAX3872: Choosing an Optimal Filter Capacitor for the MAX3872 Multi-Rate CDR
App note 402: Additional Pulse Amplitude Settings for DS2148, DS21348, DS21Q48, DS21Q348 and DS21448
App note 1926: Watchdogs Improve System Reliability—How to Choose the Right Part
App note 400: DS2155 Monitor Mode Design
App note 401: Extended System Information Bus (ESIB) Control Application
App note 1916: An Introduction to Jitter in Communications Systems
App note 398: T3/E3/STS-1 LIU Secondary Surge Protection Design
App note 516: Using Multiplexed Bus Clocks with a Microcontroller
App note 1881: -48V Hot Swap Solution For Telecom Line Cards Assures Immunity To Input Voltage Transients
App note 1873: 4mA–20mA Loop Powered Temperature Sensor
App note 1856: Signal Integrity vs. Transmission Rate and Cable Length for LVDS Serializers
App note 232: Using the DS1086 as a Microcontroller Clock to Reduce EMI
App note 1837: One-Shot Timing Improves Microprocessor Reset Circuit
App note 1819: Selecting the Optimum Test Tones and Test Equipment for Successful High-Speed ADC Sinewave Testing
App note 1814: Speed Control For Isolated -48V Fans
App note 396: Design Migration from DS21Q55 to DS21Q50 or DS21Q59
App note 397: Pulse Template Measurement
App note 1801: Network Interface and Circuit Designs for Secondary Protection of the DS2155 Single-Chip Transceiver
App note 1797: Measuring Telecom Systems Against a Pulse Mask Template
App note 1789: A Cheap, Tiny LDO Provides Up To 2A Output Current
App note 1788: HFAN-06.2: IBIS Data for CML, PECL, and LVDS Interface Circuits
App note 390: DS31256 and T1/E1 Interface
App note 1754: Portable Temperature Monitoring Demystified
App note 1752: Applying HSTL Signals to PECL Input Devices
App note 1738: HFAN-09.0.4: NRZ Bandwidth - LF Cutoff and Baseline Wander
App note 395: DS21Q59 vs. DS21Q50 Quad E1 Transceivers
App note 220: Decoupling Requirements for the DS1077/DS1085 EconOscillators
App note 394: HDLC Configuration of Framers and Transceivers
App note 393: E1 Operation of Dallas Semiconductor Framers and SCTs
App note 218: DS1086 Frequency Calculator and Frequency Calculation Algorithm
App note 1195: Maximize Battery Life and Minimize Replacements
App note 215: 2-Wire Communication Using LabVIEW
App note 391: NRZ Applications
App note 389: DS2155 Internal BERT Programming
App note 1154: Vacuum-Fluorescent-Display (VFD) Tube Manufacturers' Web Sites
App note 1145: Interface a Multiplexed-Bus Real-Time Clock to a µP With Separate Address and Data Buses
App note 1136: Switching Between Battery and External Power Sources
App note 1133: Multiple Voltage Systems Need Supply-Voltage Sequencing
App note 1130: Phase-Lock Loop Applications Using the MAX9382
App note 1126: Simple Circuit Protects Systems from Overheating
App note 1125: Circuit Generates Analog Fan-Speed Control
App note 1102: HFAN-09.0.3: APON Class A, B, & C Physical Layer Requirements
App note 507: PowerCap package allows for density upgrades, surface mount assembly
App note 387: Using DS2148/DS21348 as Repeater
App note 200: A Programmatic Approach to Calculating DS1085 Programmable-Oscillator Register Values
App note 1075: Simplify Isolated Temperature Sensing With Single Wire Sensors
App note 1062: Designing Compact Telecom Power Supplies
App note 1058: LVDS Enables High-Speed Signal Distribution in 3G Basestations
App note 1057: Compensating for ideality factor and series resistance differences between thermal-sense diodes
App note 1043: Single Supply Sequencer Sequences Negative Voltages
App note 1040: Coherent Sampling vs. Window Sampling
App note 505: Lithium Coin-Cell Batteries: Predicting an Application Lifetime
App note 182: Frequency Calculator for the DS1085/DS1085L EconOscillator
App note 384: T1/E1/J1 Dual Connector Interface
App note 985: HFAN-09.0.2: Optical Signal-to-Noise Ratio and the Q-Factor in Fiber-Optic Communications Systems
App note 382: J1 Japanese Standards
App note 967: How to Minimize Power Dissipation in Li+ Linear Chargers
App note 376: Simple, Low-Cost, 4-Port E1 Design Using DS21Q50
App note 504: Design considerations for Dallas Semiconductor real-time clocks
App note 701: Using the DS32kHz with Dallas Real-Time Clocks
App note 307: DS2152, DS2154, DS2151, DS2153, DS21X5Y and DS2155 Three Channel Drop and Insert
App note 961: Thermal Protection in Low-Cost Systems, Part 1
App note 370: Using RCLK in a BITS/SSU Application
App note 381: Interfacing the DS2155 to the MPC8260
App note 941: Circuit Monitors Board, Air, and CPU Temperature to Protect System from Overheating
App note 379: Conversion Between T1 and E1
App note 896: Fan control advances: consider fan-speed regulation
App note 872: LVDS Splitter Simplifies High-Speed Signal Distribution
App note 375: Interfacing User Devices and the DST1E1DK SCT Design Kit
App note 274: HFAN-02.0: Interfacing Maxim Laser Drivers with Laser Diodes
App note 873: High-Speed Signal Distribution Using Low-Voltage Differential Signaling (LVDS)
App note 378: DS3112 Clock Rates and Frequency Tolerances of the Transmit Clock
App note 374: DS2155 vs. DS21x5y: Software and Hardware Considerations
App note 336: Transparent Operation on T1, E1 Framers and Transceivers
App note 324: T1/E1 network interface design
App note 809: Rev Up Your Fan Speed Control Designs
App note 334: DS2172 BERT Interface to all Dallas Framers and Transceivers
App note 325: DS2151, DS2152, DS2153, DS2154 Dallas Single Chip Transceiver Crystal Selection Guide
App note 361: DS21354/DS21554 vs. DS2154 Single Chip Transceivers
App note 342: T1/E1 Framer Initialization and Programming
App note 310: D4 Framing and Signaling
App note 351: T1/E1 and T3/E3 Transformer Selection Guide
App note 341: DS2151, DS2153 Device Identification
App note 590: Maxim® Telecommunications Frequently Asked Questions
App note 360: DS21352/DS21552 versus DS2152 Single Chip Transceiver
App note 337: DS2151 Implementation of ANSI T1.231-1993
App note 589: CPU supervisors: frequently asked questions (FAQs)
App note 1858: Tiny IC Debounces Pushbutton Switch
App note 345: DS21352/552, DS2151, DS2152, DS2141A, DS21Q42 Programming SLC-96
App note 596: HFAN-02.2.0: Extinction Ratio and Power Penalty
App note 301: Legacy T1/E1 8MHz Backplane Operation
App note 502: Interfacing SPI Real-Time Clocks (RTCs) with a Microcontroller
App note 340: DS2153 Programming, ETS 300-011 Remote Alarm Generation
App note 461: Programming and Controlling the FDL on DS2141A, DS2151
App note 362: Replacing the TDK 78P7200/2241 with the DS3150 Line Interface Unit
App note 319: DS2152, DS2154, DS21x5Y, and DS2155 Interfacing to the MC68360 (QUICC32)
App note 332: DS2172 Simplified Receiver Operation
App note 333: DS2172 Pattern Synchronization
App note 309: Interfacing to the Fractional T1 and E1
App note 561: Tech Brief 7: DS2152 and DS2154 8MHz System Clock Operation
App note 571: Using Analog Temperature Sensors with ADCs
App note 356: DS21Q44 vs. DS21Q43A
App note 58: Crystal Considerations with Dallas Real-Time Clocks (RTCs)
App note 355: DS21Q4x, DS215x, and DS21x5y Test Registers
App note 95: Interfacing the DS1307 with an 8051-Compatible Microcontroller
App note 357: DS21Q42 vs. DS21Q41B
App note 82: Using the Dallas Tricklecharge Timekeeper
App note 739: Design Considerations for Data-Lump Cables
App note 1785: Flexible Hot-Swap Current Limiter Allows Thermal Protection
App note 1784: Fan Speed Control is Cool!
App note 694: Temperature Sensor ICs Simplify Designs
App note 819: Isolated Power Supply Is Suitable For Telecom/Datacom Applications
App note 836: Selecting and using RS-232 Interface Parts for Your Power Supply Voltages
App note 720: Keep the product working—microprocessor supervisors offer big insurance in small packages
App note 462: HFAN-04.0.2: Converting between RMS and Peak-to-Peak Jitter at a Specified BER
App note 487: MAX6652 System Monitor Combines Voltage Monitoring with Temperature Sensing
App note 481: Simple Circuit Activates Fan When Processor Heats Ups
App note 639: Maxim Leads the Way in ESD Protection
App note 685: How to Simplify the Interface between Microcontroller and Temperature Sensor
App note 687: Distributed Temperature Sensing Improves Reliability
App note 690: High-Voltage PWM Controller Yields Small, Efficient Telecom/Datacom Supplies
App note 680: How to design battery charger applications that require external microcontrollers and related system-level issues
App note 651: ESD Protection for I/O Ports
App note 655: Supervisor ICs Monitor Battery-Powered Equipment