Analog Telephone Devices

Telephone analog device testing includes performance tests for telephone handset, handset and speakerphone acoustics, network interface and signaling. Additional performance requirements are provided for Cordless, Caller-ID, Answering Machine devices, and Environmental considerations.

  • Handset (TIA-470.110-D narrowband, TIA-470.112 wideband)
    • Receive
    • Send
    • Sidetone
    • Stability
  • Speakerphones (TIA-470.120-D narrowband, TIA-470.122 wideband)
    • Receive
    • Send
    • Stability
  • Headset (TIA-470.130-C narrowband, TIA-470.132 wideband)
    • Receive
    • Send
    • Sidetone
    • Stability
  • Conversational Gain (TIA-4965)
    • Handset acoustic output gain
  • AST Custom test procedures for parameters not covered by standards:
    • Acoustic Echo Control (AEC) characteristics (AST Custom)
    • Line Echo Control (LEC) characteristics (AST Custom)
    • Conference Speakerphone (TIA-470.120-D, AST Custom)
    • Speakerphones switching (AST Custom based on IEEE-1329)
    • Double-Talk characteristics (AST Custom)
  • Perpendicular (Axial) orientation testing
  • Transverse (Radial) orientation testing
  • Measuring performance of:
    • Field Intensity 
    • Frequency Response
    • Distortion
    • Noise
    • Signal-to-Noise ratio
  • RF Range (TIA-470.310-D)
    • Simulated Range testing procedures
    • Field range testing procedures
  • Cordless Features (TIA-470.320-C)
    • Talk-time and Standby-time
    • Multi-handset
    • Indicators (low battery, out of range)
  • Battery Charging Analysis (AST Custom)
    • Initial Charge Profile
    • Talk Times
      • Near Field
      • Far Field
    • Discharged (Dead) Battery Charge Profile
    • Stand-by Times
  • Resistance and Impedance (TIA-470.210-F)
    • On-hook resistance and Impedance
    • Off-hook resistance and Impedance
  • Alerter Acoustic and Response (TIA-470.220-E)
    • Alerter Sensitivity to Ring Signals
    • Alerter Acoustic Output
  • Network Dialing and Signaling (TIA-470.230-D)
    • Pulse Dialing
    • Flash Signal
    • DTMF Dialing
  • Type 1 On-hook CID
  • Type 2 Off-hook CID
  • VMWI
  • Message Format
  • CAS Detector
  • Measuring reception performance for:
    • FSK signal parametrics
    • CAS signal parametrics
    • Impairments due to:
      • Noise
      • DC shifts, OSIs, Line Reversals
      • Dropouts
    • Message Format
      • Message Types
      • Parameters
      • Preamble
      • Markout
    • Exception Handling
      • Out-of-range data
      • Missing data
      • Checksum errors
  • Immunity Radiated Electric Field (E-field) Interference
  • Immunity Conducted Interference on Signal Leads
  • Immunity Conducted Interference on Power Leads
  • Measuring performance of:
    • Receive level of acoustic output
    • Transmit level of electrical output
    • Functionality during application of the interference
  • Lightning Immunity
    • Signal leads
    • Power leads
  • Electro-Static Discharge (ESD)
    • Air discharge
    • Direct contact discharge
    • In-direct contact discharge
  • AC Power Variations
    • Transient interruptions
    • Short term voltage sags
    • long term interruptions
  • Temperature and Humidity
    • Operating conditions
    • Storage conditions
  • Drop Testing
    • Packaged
    • Unpackaged
  • Vibration

 

  • Signal recognition
  • Immunity to noise
  • Triggering events
  • Inter-operability
  • OGM, ICM message frequency response, output levels, input thresholds.
  • Ring signal detection and rejection
  • Parallel phone detection
  • VOX timeout and threshold
  • Network DC signal detection and rejections
  • Remote access capabilities

Measuring acoustic echo control performance including:

  • Acoustic echo canceller characteristics
  • Double-talk characteristics
  • Switching parameters
  • Noise Suppression
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