High Density Remote POTS (HD R-POTS)
The High Density Remote Plain Old Telephone Service (HD R-POTS) plug-in card is a 24-port, loop start subscriber termination card. With support for 24 subscribers per card, the HD R-POTS card dramatically increases the capability of the Tellabs 1000 HD CBA to support high-density applications.

Features and Benefits

  • TR-008 and GR-303 only
  • Call Message Waiting Indicator (CMWI)
  • Remote test access to metallic tip and ring
  • 1830W loop length resistance (including station)
  • 900 Ohm structural impedance
  • Forward disconnect
  • On-hook transmission (CLASS) capability
  • Twenty-four (24) 2-wire circuits

Included Highlights

Ease of Operations

The HD R-POTS card has two LED indicators on the front panel. A green BUSY LED indicator, when lit, indicates that the HD R-POTS circuit is busy or is being tested and must not be removed from service. A flashing red FAIL LED indicates that there is illegal signalling on any one circuit. A red FAIL LED indicates that the unit has failed.

Mechanized Loop Testing

The HD R-POTS also supports multiple loop testing systems including Mechanized Loop Testing (MLT).

High Density Analog Voice

The HD R-POTS supports a loop length resistance of 1830 Ohms, ring cadence following, local ring trip, on-hook transmission between ring-bursts, and forward disconnect. The card supports Call Message Waiting Indicator (CMWI).


  • Solid Red: Plug-in card failure
  • Flashing Red: Illegal signalling on at least one circuit
  • Green: At least one circuit is busy or being tested
Test and Measurement
  • Remote test access to metallic tip and ring
  • On-hook detection threshold: > 9.0 kOhms
  • Off-hook detection threshold: < 2.0 kOhms
  • Open ckt. voltage - on hook transmission mode: 42.5 V minimum
  • Open ckt. voltage - normal mode (battery -52 V): 44-46 Vdc minimum
  • Loop current (constant): 25 mA, 20 mA minimum @ 1830 Ohms
  • Maximum loop length including station: 1830 Ohms (for DC supervision)
  • Ring trip delay (85 Vrms, 20 Hz): < 200 ms
  • Ring trip detector (85 Vrms, 20 Hz): > 2000 Ohms
  • Pulse distortion (pw > 25 ms): < 15 ms
  • End to end signaling delay: < 50 ms
  • Longitudinal balance: x > 58 dB (200 Hz - 1.0 kHz) and x > 53 dB @ 3.0 kHz
  • Two wire return loss: ERL > 28 dB and SRL > 20 dB
  • Maximum VF overload level: +5.0 dBm
  • Total loss (DLC loss + cable loss @ 8 dB, 1000 Hz, 70°F), #22 AWG cable = 17.391 kft., #24 AWG cable = 13.699 kft. and #26 AWG cable = 10.830 kft.
  • Nominal loss (referenced to 2-wire 900 W): -2.0 dBm ± 0.5 dB
  • Nominal input impedance: 900 Ohms + 2.16 μF
  • Companding: μ-Law
  • Humidity: 5% - 95%, non-condensing
  • Storage temperature: -40°C to +70°C (-40°F to +158°F)
  • Operating temperature: -40°C to +65°C (-40°F to +149°F)
  • Weight: 20 lbs (9.07 kg)
  • Depth: 12.0 in (30.5 cm)
  • Width: 19.0 in. (48.3 cm)
  • Height: 12.25 in. (31.1 cm)
  • TR-008
  • GR-1089-CORE
  • GR-303-CORE
  • Minimum base software FP16 and higher
  • Craft User Interface (CUI)
  • Tellabs Panorama Element Management System (EMS)
Product Specifications Sheet

High Density Remote POTS (HD R-POTS)
Product Specifications
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