Specifications

Chapter 4 4-Wire E&M/TO Configuration
4-8
C-Type 96 Pin DIN Connector
50-Pin AMP
Champ Connectors,
Male
50 Conductor, Solid
Strand, 24AWG
A
B
Figure 5-5. Cable for Normal or Tandem Modes
CONFIGURING SIGNALING TYPES AND TRUNK
PROCESSING
The 4-wire E&M/TO card is also equipped with a 4-position DIP switch for selecting between E&M Signaling
on Transmission Only (TO) (TO = no E&M Signaling), and setting busy or idle during trunk processing. This
switch is located at the front of the circuit board next to the 64-pin DIN connector.
Table 5-5. 4-Position DIP Switch Settings
Switch
Number
ON OFF
1 Transmission Only
(no signaling)
Normal E&M
2 N/A N/A
3 N/A N/A
4 TP Idle TP Seize
TP BUSY/IDLE SWITCH
Use switch 4 to select whether the signal driver seizes the line (busy), or drops the line (idle) during trunk
processing. (Trunk processing occurs when the T1 line is in an alarm or reset state.) For example, in Type
I, Normal mode, ON = E Lead active during trunk processing, and OFF = E Lead idle during trunk
processing.