Converter, Telephone Signal CV-1548/G

TM 11-5895-45814

Plug supervision signaling

3-5. Converter, Telephone Signal CV-1548/G

(2 wire) modes:

a Use. Converter, Telephone Signal CV-1548/G (fig.

Originate (OR)

Switchboard trunk opens or

3-5) provides telephone signal conversion and hybrid

closes T (tip) and R (ring)

facilities for 12 voice frequency channels. Each channel

lead circuit in 18A3A or

contains one-way plug supervision and ringdown

18A3B panel.

signaling conversion facilities, a hybrid for converting

Terminate (TE)......... 18A3A or 18A3B panel

between 2-wire and 4-wire circuits, 4-wire straight-

opens or doses T (tip) and

through patching, and switching for selecting

R (ring) lead circuit in

combinations of these functions.

switchboard trunk.

b. Technical Characteristics.

Plug supervision:

No. of channels .................. 12

One way ............18A3A and 18A3B

Operating modes (selected inde-

Two way .......... 18A4

pendently in each channel). . . 20 Hz signaling 2-wire;

Multiplex terminal inputs and

plug

outputs, 4-wire (all

supervision signaling, 2-

signaling modes):

wire (one-way from

From multiplex terminal

No tone or 1,600 Hz

originator to terminator);

inband tone

no signaling, 2-wire

between --25

(hybrid only in use); no

and 0 dBm.

signaling;4-wire

To multiplex terminal

No tone or 1,600 Hz

(channel patched

inband

straight through).

tone at -15 dBm

20 Hz signaling, 2-wire:

(adjustable + 5 dB).

From subscriber .................. 20 Hz ringing voltage at 21

Channel characteristics

volts (18A3A panel) or

(2-wire):

16 volts (18A3B panel)

Insertion loss ..........4.5 dB maximum (250 to 3,500 Hz)

rms minimum.

Input and output

To subscriber....................... 20 Hz ringing voltage at 75

impedance .........600 ohms (balanced to ground)

volts rms minimum

Input voltage ......... 109 to 121 volts, 47 to 420 Hz

(across four lines

Power consumption 17 watts (idle), 60 watts (all

simultaneously).

channels ringing).

Operating temperature:

Range ...................+1250 F. to -26 F.

3-6