
HDSL Quick Installation Guide
for ADTRAN FT1 DP and FNID
PRACTICES
Three 
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Switch | Function | Description | 
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Channel Select  | Selects between alternating and contiguous DS0 channels.  | ||
Closed  | Alternate  | 
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Open  | Contiguous  | 
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Auto Code Detect  | When this switch is closed, the unit automatically detects the line code as B8ZS or  | ||
Closed  | Auto  | AMI. | |
Open  | Manual  | 
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Manual Code Select  | When   | ||
Closed  | AMI  | selects AMI.  | |
Open  | B8ZS | 
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Auto Frame Detect  | When this switch is closed, Auto Frame Mode detection is enabled and the unit  | ||
Closed  | Auto  | selects between SF and ESF modes automatically. When open,   | |
Open  | Manual  | selects the framing mode.  | |
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Framing  | When   | ||
Closed  | Superframe Format (SF)  | 
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Open  | Extended Superframe Format (ESF)  | ||
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Latching Loopback  | This switch is used to enable or disable latching loopbacks.  | ||
Closed  | Enabled  | 
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Open  | Disabled  | 
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Loopback Timeout  | |||
Closed  | 20 Minutes  | 
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Open  | None  | 
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Loopback Keep Alive  | Sets the data pattern sent to the customer upon FNID network loopback.  | ||
Closed  | AIS | 
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Open  | All 1s, framed  | 
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 Open, Open .... 0 dB
Open, Closed .. 
Closed, Open .. 
Closed, Closed 
The DS1 signal level delivered to the customer through the FNID may be selected as one of four values: 0, 
Idle Code Detect  | When   | |
Closed  | Auto  | between 7F (Hex) and FF (Hex).  | 
Open  | Manual  | 
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SW   | Idle Code  | When   | 
Closed  | FF  | selects 7F (Hex).  | 
Open  | 7F  | 
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Channels   | This switch enables or disables A/B signaling for Channel   | |
Closed  | Enabled  | channels.  | 
Open  | Disabled  | 
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Channels   | This switch enables or disables A/B signaling for Channels   | |
Closed  | Enabled  | channels.  | 
Open  | Disabled  | 
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FNID SW1, SW2 20 mA, 60 mA Off, On
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  | SW1 DS1 SEALING CURRENT SW2  | 
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  | Sealing current disabled  | ||||
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  | 20MA  | OFF  | 
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  | LOCAL SPAN  | 
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  | 60MA  | ON  | 
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  | Sealing current enabled  | |
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Indicates default setting  | 
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  | 20 mA sealing current select  | 
Powered  | Powered  | 
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by   | by span  | 
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VDC  | current  | 
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