Filter
Top Products
Specifications
Release 3.3 83
Operation
Incoming analog calls are converted to digital (PCM) signals by one of 16 line circuit modules
on the ONS line card. Calls are switched by the Main Controller and the two parties are
ONS Line Card Variant Specifications
Note: The ONS CLASS/CLIP line card is available in NA and the UK only.
Feature NA Germany China UK Int'l*
MC320 Card
Variants
BD, BE for
ONS line
card; EA for
ONS
CLASS/CLIP
line card
CH CG CD for ONS
line card; EB
for ONS
CLASS/CLIP
line card
CE
PCM Coding µ-law A-law A-law A-law A-law
External Loop
Resistance
(see Note 1)
600 ohms 850 ohms
@ 23mA
600 ohms 600 ohms 600 ohms
External Wire
Resistance
(see Note 2)
400 ohms 650 ohms 400 ohms 400 ohms 400 ohms
Power
Consumption
BD: 9.09 W
BE: 9.82 W
9.64 W 9.82 W 9.82 W 9.82 W
Message
Waiting (see
Note 4)
Yes Yes Yes Yes Yes
Calibrated
Flash
No Yes Yes Yes Yes
Nominal
Ringing
Voltage
80 Vrms @ 20
Hz
65 Vrms @ 25
Hz
80 Vrms @ 25
Hz
80 Vrms @ 25
Hz
80 Vrms @ 25
Hz
Nominal Trip
Battery
Silent Interval
-27 Vdc -30 Vdc -27 Vdc -27 Vdc -27 Vdc
External Loop
Length:
22 AWG (23
IWG)
26 AWG (27
IWG
3800 m
(12350 ft.)
1500 m
(4875 ft.)
3700 m
(12025 ft.)
3700 m
(12025 ft.)
3700 m
(12025 ft.)
* International = Caribbean, Cuba, Europe, Middle East and Africa
Notes:
1. Stations whose line loop resistances range between 400 and 1600 ohms must terminate on an
OPS line card.
2. External wire resistance measurements are based on the assumption that a 200 ohm set was
used.
3. The German variant also provides impedance matching, fixed and variable gains, as well as Tip
and Ring protection, with selectable fuse or EMI choke option.
4. The message waiting circuit for the ONS CLASS/CLIP line card has a voltage below 120v on the
ring lead.