Carrier Access SNMP manual Programming E&M Signaling Types, Jumper Switch Settings

4-Wire E&M/TO Configuration

M	M-Lead
	Detector

			E
-48V		E-Lead
		Detector
	Tandem Mode			Normal Mode
	(Originating)		E&M Type 5	(Terminating)
	(Switching Equipment)			(Channel Equipment)

Figure 11-6: E&M Signaling Type 5

-48V

11.5 Programming E&M Signaling Types

11.5.1 Jumper Switch Settings

E&M signaling types I, II, IV and V (see Figure 11-3, Figure 11-4, Figure 11-5, and Figure 11-6) are configured by jumpers J1, J2 and J3 located on each channel. Because the signaling types are config- ured for each channel individually, different E&M types may be mixed on the same card. The entire card, however, must operate in either Normal or Tandem mode, which is determined by the signaling cable used (Section 11.7, Normal and Tandem Cables). Table 11-2(which is also printed on the 4- wire E&M back plate) shows the proper jumper connections for each signaling type and mode.

Table 11-2: Jumper Connections by Type and Mode

E&M

Type

1

1

2

2

4

4

5

5

Mode

Normal

Tandem

Normal

Tandem

Normal

Tandem

Normal

Tandem

Jumper Placement

	J1		J2	J3
3-4		5		8-9
1-2		5		10-11
3-4		6		7-8
1-2		6		7-8
1-2		6		7-8
1-2		6		7-8
1-2		5		8-9
1-2		5		8-9

The jumpers are blocks that make several connections simultaneously. The entire block is moved

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