Peripheral Equipment cards 49
QPC450 CO/FX/VVATS Trunk
System Hardware-All
Purpose-Interfaces four 600 or 900
GJ
CO, FX or WATS trunks with the
system in l.t-Law applications. The card can also detect ringing on either the
tip or ring leads and has provision to extend the normal loop range
fi-om
1200
SL
to 2600
n
using balanced battery boost from the Central Office.
Refer to
COIFXIWATS trunk engineering description (
553-2201-185) for
more information.
The card contains four separate identical trunk circuits. Trunk usage option
is selected by switches on the circuit card.
Note:
QPC45OE or later vintage is required.
Quantity-One
per four CO/IX/WATS trunks
QPC578 Integrated Services Digital Line
System Hardware-All
Purpose-Interfaces the Digital telephone sets and the associated ASCII
terminals on Time Compression Multiplexing
(‘KM)
loops to the system.
Each card contains 16 separate line circuits, 8 Data circuits and 8 Voice-
circuits.
Quantity--One
per 16 digital lines
QPC594 16-Port 500/2500 Line
System Hardware-All
Purpose-Allows for 16 circuits per card (quad density) using p-law.
Quantity-One
per 16 500/2500 lines
QPC659 Dual Loop Peripheral Buffer
System Hardware-All
Purpose-Interfaces one or two network loops. Also, a
Digitone
daughterboard can be used to convert multifrequency dialing signals from a
Equipment identification and ordering information 553-3001-154