P
AGE
8
44443-1098 <90-00059>
T
ABLE
A - 44443 S
WITCH
AND
S
TRAP
O
PTIONS
OPTION
Attenuation
Receive
Transmit
NBO (capacitors add)
2.2 nFd
4.7 nFd
8.2 nFd
15 nFd
33 nFd
68 nFd
600 ohms
900 ohms
Two-Wire Impedance
600 ohm
900 ohm
Idle Line Termination or Echo
Suppression Override (-01 only)
Idle Line Termination
Echo Suppression Override Only
Both Inactive
SWITCH OR STRAP
RCV ATTEN (front panel)
XMT ATTEN (front panel)
S3-1
S3-2
S3-3
S3-4
S3-5
S3-6
S3-8 (S2 on 600)
S3-8 (S2 on 900)
S1, S2 on 600
S1, S2 on 900
ILT Bypass OUT
Load Strap to ILT
ILT Bypass IN
Load Strap to ES
ILT Bypass IN
Load Strap to OUT
Wiring
Normally, the 44443 is used in a shelf that is pre-wired at the
factory. Fig. 4 shows the edge connector pin designations if wiring
is required.
Module Mounting
Install the module in the proper slot in the equipment housing by
sliding the module along the guide slots. Firmly seat the edge
connector in the receptacle.
Checkout
Table C provides check-out procedures for the 44443-00 and 44443-
01 Four-Wire Termination Sets. Refer to Fig. 3 for a view of the
front panel. Test equipment required for this procedure include:
♦
Audio Oscillator, 600 ohm.
♦
AC Voltmeter with decible scale.
♦
Extender card, 400-type, 56-pin edge connector.
CONTINUED
. . .
INSTALLATION
