Overview Applications Specifications


MDX•I Specifications


Physical Specifications
  • Width: 19 in rack mount / 48 cm
  • Height: 8.75 in / 22 cm
  • Depth: 17 in / 44 cm
  • Power: -48 VDC standard
    • 100 through 240 VAC, 50-60Hz optional
    • A MDX•I shelf typically draws less than 3.0 Amps at –48 VDC
  • Environment:
    • 0°C to 50°C (32°F to 122°F) without fans
    • 5% to 95% relative humidity (non-condensing)

System Capacity
  • 32 to over 10,000 ports

Control
  • Flash ROM for field upgrades of control package and database
  • Multiprocessor distributed processing
  • Stored program controlled
  • Non-volatile database

Ringing
  • 20 Hz bridged standard, others available

   Service
  • Card level replacement
  • Small spares inventory

Tones
  • Standard precise tones (LSSGR)
  • Special and international call progress tones (optional)

Transmission
  • Crosstalk Attenuation: > 75 dB
  • Digital 8 bit PCM format
  • E&M Trunks 2- or 4- wire, Type 1 or 2
  • E1 (2.048 Mbits/s) Digital Interface
  • Idle Channel Noise: < 23 dBrnc
  • Line-to-Line Insertion Loss: ~6 dB (flexible)
  • Line-to-Trunk Insertion Loss: ~0.3 dB (flexible)
  • Longitudinal Balance: 60 dB (trunks); 40 dB (lines); 60 dB (lines, optional)
  • Nominal Impedance: 900 ohm
  • T1 (1.544 Mbit/s) Direct Digital Interface
  • µ-255 law (A-law companding and companding law conversion optional)