ADTRAN 850 specifications DIP Switch S1 Options Function Description, Esf

Table 3. DIP Switch S1 Options

Switch	Function			Description
S1-1	Framing Format	Enables either Extended Superframe Format (ESF) or Superframe
		Format (SF). This option must be configured identically with all other T1
		network equipment on this circuit.
		On*		SF
		Off		ESF
S1-2	Line Code	Enables Bipolar Eight-Zero Substitution (B8ZS), which allows for Clear
	Format	Channel operation for the T1 carrier system, or enables Alternate Mark
		Inversion (AMI). This option must be configured identically with all other
		T1 network equipment on this circuit.
		On*		AMI
		Off		B8ZS
S1-3	TR-08 Signaling	Enables TR-08 signaling option. When enabled, S1-1 is ignored.
		On*		Enabled
		Off		Disabled
S1-4	CSU Loopback	Enables the CSU Loopback Function. Unit will respond to CSU loopback
		sent from a remote network device or test equipment.
		Off*		Enabled
		On		Disabled
	Timing Mode	Determines clock source for TA 850.
S1-5	Timing A	S1-5	S1-6	Function
S1-6	Timing B	Off	Off	Loop timing: Derives timing from T1
		On	Off	External timing: Derives timing from external BITS
				clock.
		Off	On	Local timing: Clock generated from internal timing
				source.
		On*	On*	Loop timing: Derives timing from T1.
	DS1 Attenuation	Selects attenuation to set receiver sensitivity in decibels (dB).
S1-7	LBO A	S1-7	S1-8	Setting
S1-8	LBO B	Off	Off	0 dB/0-133 ft (LBO)
		On	Off	-7.5 dB
		Off	On	-15 dB
		On*	On*	-22.5 dB
		(Note: Additional LBO settings can be provisioned through the menu
		interface.)
*Denotes factory default setting.

4 Issue 2, August 2001 61200373L1-5B