ADC H2TU-C-231 DS1 Line Coding (DS1) Option

LTPH-UM-1109-01, Issue 1Provisioning

Table 6. H2TU-C-231 List 2 ADC Config Menu Options (Continued)

ADC Config Menu	Front Panel
	Display	Selection	Description
Options
	Code
DS1 BER	DBER	ENA	Enables the fixed 24-hour DS1 BER threshold.
Threshold		DIS	Prevents the generation of a system alarm due to DS1 BER.
See “DS1 BER
(DBER) Option”
on page 21.
HDSL2 BER	HBER	1E-6	System alarm relay contact closes and the Status LED flashes red when the
Threshold			Block Error Rate exceeds 10-6.
See “HDSL2 BER		1E-7	System alarm relay contact closes and the Status LED flashes red when BER
Threshold (HBER)			exceeds 10-7.
Option” on		NONE	Prevents generation of a system alarm due to BER.
page 21 and
“System Alarm
Output Pins” on
page 58.
Special Loopback	SPLB	GNLB	Configures the HiGain HDSL2 system to respond to the generic inband
Mode			loopback codes.
		A1LB and	Configures the HiGain HDSL2 system to respond to the inband loopback
		A2LB	codes of the Westell addressable repeater.
		A3LB	Configures the HiGain HDSL2 system to respond to the inband loopback
			codes of the Wescom addressable repeater.
		A4LB	Configures the HiGain HDSL2 system to respond to the inband loopback
			codes of the Wescom Mod 1 addressable repeater.
		A5LB	Configures the HiGain HDSL2 system to respond to the inband loopback
			codes of the Westell Mod 1 addressable repeater.
SmartJack	LPBK	ENA	Enables the HiGain HDSL2 system to recognize all inband SmartJack (SMJK)
Loopback			loopback commands.
		DIS	Configures the HiGain HDSL2 system to ignore all inband SmartJack
			loopback commands.
Minor Alarm	ALM	ENA	Enables the generation of the output alarm on pins 20 and 21 when a system
			alarm condition occurs.
		DIS	Disables the generation of the output alarm on pins 20 and 21 when a system
			alarm condition occurs.
Remote	RDA	ENA	Enables a remote DS1 LOS condition at the input to the H2TU-R to generate
Disconnect Alarm			an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the network.
		DIS	Prevents a remote DS1 LOS condition at the input to the H2TU-R from
			causing an LOS alarm. The front-panel Status LED still flashes red and the
			ALRM RLOS message displays, but the alarm relay contacts do not close and
			LOS is sent towards the network from the H2TU-C instead of AIS.

DS1 Line Coding (DS1) Option. The DS1 line code option should always be set to conform to the type of DS1 service (AMI or B8ZS) being provided by the HiGain HDSL2 system. The Auto mode, which can adapt to either AMI or B8ZS, should only be used in applications that require it (such as when HiGain HDSL2 acts as a standby circuit to DS1 circuits whose line codes are not known or may be both AMI and B8ZS). This is because the Auto mode induces one BPV in the DS1 bit stream whenever it switches from AMI to B8ZS. The Auto mode allows both the H2TU-C and the H2TU-R to set its DS1 output code to that which is being received at the distant end DS1 input. This forces the input and the output codes in each direction of transmission to be identical.

H2TU-C-231 List 2 January 9, 2002 19