ONS

[AlfredSpecial]

This is really bugging me so i thought someone would like to turn the light on for me.

What does ONS stand for?


i always thought it was on premises extension!!

 

[MitelTech]

ON premiSe line, and for your info OPS is Off PremiSe line. OPS cards are stronger, produce more voltage for the ringer and offer better short circuit protection and go alot further on the same size cable as ONS. You only get 8 stations on an OPS card though, and they cost more.

 

[AlfredSpecial]

Cheers MitelTech,

I thought an OPS was trunks

thanks again you have cleared that for me

 

[MitelTech]

OPS is also only available for a per node (2000 for sure, I imagine the 3300 could run it as well), not available on the 3300's ASU.

 

[Matt85]

how much further do ops work? and how far do ons work? we have a marina with ons lines running to the end of our pier probably a half mile away from the pbx and it works fine.

 

[MitelTech]

I will look up the tech spec's when I'm in the office tomorrow. If you want to look it up yourself, grab the 2000 tech doc's from the FAQ area and go to the Engineering section, they're in there.

 

[MitelTech]

ONS Line Card Specifications (all variants)

Number of Circuits per Card: 16 ONS circuits
Loop Detector Threshold: 15 mA (+1 mA) (ONS line card)
13 mA (+1 mA) (ONS CLASS/CLIP line card)
Trip Battery Ringing Interval: -48 Vdc nominal
Bridged Ringers: 5 (C4 or equivalent)
Features Provided: 2-wire/4-wire conversion
A-D/D-A conversion
DC loop supervision and dial pulse collection
ringing and ring trip detection up to 5 telephones per circuit
ground button detection
self-test capability
automatic card identification
constant current feed
Note: These specifications apply to both the ONS line card and ONS CLASS/CLIP line card.



OPS Line Card Specifications

Variants Available: A-law (UK), µ-law (NA)
Number of Circuits per Card: 8 OPS Circuits
Power Consumption: UK: 8.53 Watts
NA: 8.67 Watts
External Loop Resistance: 1800 ohms maximum
External Wire Resistance: 1600 ohms maximum
External Loop Length: 5853 meters (19022 ft.), 26 AWG (27 IWG)
15240 meters (49530 ft.), 22 AWG (23 IWG)
Minimum Conductor Leakage: 1500 ohms
Loop Detector Threshold: 12 mA (+1 mA)
Trip Battery Silent Interval: -50 Vdc nominal
Trip Battery Ringing Interval: -50 Vdc nominal
Bridged Ringers: 5 (C4 or equivalent)
Ringing Voltage and Frequency: 82 to 90 Vrms, 17 to 25 Hz
Features Provided: 2-wire/4-wire conversion
A-D/D-A Conversion
DC Loop Supervision and Dial Pulse Collection
Ground Button Detection and Ring Lead
Current Limiting
Self-Test Capability
Automatic Card Identification
Compliance: Complies with all pertinent sections of EIA Standard RS-464