Patton electronic RocketLink-G NTU Rack Mount G.SHDSL Modem Card CONFIGURING THE E1 REAR CARD

DTE Shield (DB-15 Pin 1) & FRGND (JB3). In the connected position, this strap links DB-15 pin 1 & frame ground. In the open position, pin 1 is disconnected from frame ground.

JB3	Description
Position 1&2	DTE Shield (Pin 1) and FRGND Connected
Position 2&3	DTE Shield (Pin 1) and FRGND Not Connected

SGND & FRGND (JB4). In the connected position, this strap links DB-15 pin 8 (Signal Ground) and frame ground through a 100 ohm resistor. In the open position, pin 8 is connected directly to frame ground.

JB4	Description
Position 1&2	SGND (Pin 8) and FRGND Connected through a 100-ohm resistor
Position 2&3	SGND (Pin 8) and FRGND Directly Connected

3.8 CONFIGURING THE E1 REAR CARD

The E1 rear card features conÞguration capability via hardware switches and jumpers. Sections 4.1 and 4.2 describe all switch and jumper conÞg- urations for the 3088RC/K model. Section 4.3 describes the conÞgura- tion required for your mDSL modem.

DIP Switch ConÞguration

The E1 card has eight internal DIP switches (S1-1 through S1-8). The DIP switches can be conÞgured as either “On” or “Off.”

Switch S1-1 : Line Coding. Use Switch S1-1 to control the Network Line Coding options. Set these options to be the same as the Line Cod- ing that has been provided by your Service Provider.

	S1-1	Line Framing & Coding
	Off	HDB3
	On	AMI
Line Coding Options:

•High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter deliberately inserts a bipolar violation when excessive zeros in the data stream are detected. The receiver recognizes these special viola- tions and decodes them as zeros. This method enables the network to meet minimum pulse density requirements. Use HDB3 unless AMI is required in your application .

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