ADTRAN DE-4E specifications SW1 Option Settings, Enabled

Table 2. SW1 Option Settings

(Default settings are indicated in bold typeface.)

Switch	Function	Description
SW1-1	Code Select	SW1-1 On selects B8ZS line code. SW1-1 Off selects AMI.
		Off	AMI
		On	B8ZS
SW1-2	Framing	SW1-2 Off selects SF. SW1-2 On selects ESF.
		Off	SF
		On	ESF
SW1-3	Channel Select	Selects between Alternating and Contiguous DS0 channels.
		Off	Alternate
		On	Contiguous
SW1-4	Latching Loopback	Used to enable or disable latching loopbacks.
		Off	Disabled
		On	Enabled
SW1-5	Loopback Timeout	Used to enable or disable automatic loopback timeout.
		Off	Automatic loopback timeout is disabled
		On	Loopback timeout is enabled and set for 20 minutes.
SW1-6	Dumb/Smart Channel Bank Enable	Used to select dumb or smart channel bank operation
		Off	Unit is provisioned for an NT1 bank with a Smart Transmit/Receive
			Unit (STRU) installed. Two-state signaling available (smart mode)
		On	Unit is provisioned for an NT1 bank with a Transmit/Receive
			Unit (TRU) installed. Four-state signaling available (dumb mode)
SW1-8	Protected Loopback	Used to enable or disable protective loopback.
		Off	Disabled.
		On	Enabled.

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