HDSL Quick Installation Guide
for ADTRAN FT1 DP and FNID
PRACTICES
Three eight-position switch packs (SW1, 2, 4) and two four-position switch packs (SW3, 5) are used to configure
FT1 DP mode of operation as listed in the table below. Refer to ADTRAN Installation/Maintenance practices for more
information.
Option Settings
(arrows indicate default settings)
Switch
Function
Description
SW1-1 ............. Channel Select
Closed ............. Alternate
Selects between alternating and contiguous DS0 channels.
Open ............... Contiguous
SW1-2 ............. Auto Code Detect
Closed ............. Auto
When this switch is closed, the unit automatically detects the line code as B8ZS or
AMI.
Open ............... Manual
SW1-3 ............. Manual Code Select
Closed ............. AMI
When SW1-2 is open, SW1-3 open selects B8ZS line code, while SW1-3 closed
selects AMI.
Open ............... B8ZS
SW1-4 ............. Auto Frame Detect
Closed ............. Auto
Open ............... Manual
When this switch is closed, Auto Frame Mode detection is enabled and the unit
selects between SF and ESF modes automatically. When open, SW1-5 manually
selects the framing mode.
SW1-5 ............. Framing
When SW1-4 is open, SW1-5 closed selects SF. SW1-5 open selects ESF.
Closed ............. Superframe Format (SF)
Open ............... Extended Superframe Format (ESF)
This switch is used to enable or disable latching loopbacks.
SW1-6 ............. Latching Loopback
Closed ............. Enabled
Open ............... Disabled
SW1-7 is used to enable or disable automatic loopback timeout.
Sets the data pattern sent to the customer upon FNID network loopback.
SW1-7 ............. Loopback Timeout
Closed ............. 20 Minutes
Open ............... None
SW1-8 ............. Loopback Keep Alive
Closed ............. AIS
Open ............... All 1s, framed
The DS1 signal level delivered to the customer through the FNID may be selected
as one of four values: 0, -7.5, -15, or -22.5 dB.
SW2-8, 2-7...... DS1 Transmit Level
Open, Open .... 0 dB
Open, Closed.. -7.5 dB
Closed, Open.. -15 dB
Closed, Closed -22.5 dB
When SW3-1 is closed, auto idle code detection is enabled and the unit selects
between 7F (Hex) and FF (Hex).
SW3-1 ............. Idle Code Detect
Closed ............. Auto
Open ............... Manual
WhenSW3-1isopenandSW3-2isclosed, selectsFF(Hex). WhenSW3-2isopen,
selects 7F (Hex).
SW 3-2 ............ Idle Code
Closed ............. FF
Open ............... 7F
This switch enables or disables A/B signaling for Channel 1-8 of the selected FT1
channels.
SW4-1-SW4-8 Channels 1-8 A/B Signaling
Closed ............. Enabled
Open ............... Disabled
ThisswitchenablesordisablesA/BsignalingforChannels9-12oftheselectedFT1
channels.
SW5-1-SW5-5 Channels 9-12 A/B Signaling
Closed ............. Enabled
Open ............... Disabled
FNID
SW1, SW2
20 mA, 60 mA
SW1 DS1 SEALING CURRENT SW2
POWER
Sealing current disabled
Sealing current enabled
OFF
ON
20MA
60MA
LOCAL SPAN
Off, On
Indicates default setting
20 mA sealing current select
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61242.047L2-13A
1
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