Carrier Access SNMP Normal and Tandem Cables, Configuring Signaling Types and Trunk Processing

4-Wire E&M/TO Configuration

Table 11-3: E&M T1 Signaling

Detector	XMT Signaling Bits			RCV Signaling Bits			Driver
	A	B		A	B
Off		0	0
On		1	1
				0		*	On-Hook
				1		*	Off-Hook

*Don’t care (0 or 1)

11.7 Normal and Tandem Cables

Individual E&M/TO voice cards require the purchase of the Normal mode or Tandem mode cables listed below in Table 11-4.The type of cable used with the signaling line connector determines whether all twelve channels of that card operate only in that mode. Physically, the Normal and Tan- dem cables have one 96-pin DIN connector that plugs into the E&M card. The 96-pin DIN connector has two 50 conductor, 24 AWG cables leading to two 50-pin Telco connectors. The Telco connectors use standard RJ-2HX pinouts for 4-wire E&M, providing six channels per connector (twelve chan- nels per card). Figure 11-8and Figure 11-9show the 4-wire E&M/TO cables.

Table 11-4: Normal and Tandem Mode Cables for 4-wire E&M/TO Card

CAC	Cable	Application	Connectors		List
Part Number	Length		and Wiring		Price
005-0004-10’	10ft	Normal Mode Cable supporting E&M Types I, II,	C-Type 96-Pin		$190
	(3.05m)	IV, and V in Normal (Non-Tandem) Operation.	Male to	Dual
		Normal operation is typical of channel equipment	50 Pin	Telco
		such as phones, and modems, which are viewed as	Male Connec-
		terminating equipment.	tors, 24AWG
005-0005-10’	10ft	Tandem Mode Cable supporting E&M Types I, II,	C-Type 96-Pin		$190
	(3.05m)	IV, and V in Tandem Operation. Tandem operation	Male to	Dual
		is typical of switching equipment such as PBXs and	50 Pin	Telco
		CO switches which can be said to originate traffic.	Male Connec-
			tors, 24AWG

11.8 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 regu- lar or clear channel E&M signaling types 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.

11-8 9/24/01