4 • Basic Application Configurations

Model 3086 G.SHDSL Integrated Access Device User Guide

 

 

installed at a Central Office should be set to CO. For point-to-point operation, one unit must be CO while the other must be CP.

S3-3

Setting

 

 

Off

CP

ON

CO

 

 

Switch S3-3: Transmit Clock Mode. Use Switches S3-3 to configure the Model 3086 for internal or external clock mode (keep in mind that this setting only affects the operation of the serial port).

S3-3

Clock mode

 

 

Off

Internal. Transmit Clock to DTE is generated internally by the Model 3086

On

External. Transmist Clock to DTE is generated from external clock signal received

 

from DTE. (This option is only available when the Model 3086 is set to CO mode.

 

 

T1 Interface

The 3086 enables T1 or E1 device located at customer locations to access a carrier’s network over two wire, long reach DSL links. This capability allows providers to offer T1/E1 services at customer locations that were previously outside the reach of standard T1/E1 lines.

The 3086/K offers a user configurable T1 or E1 interface. Selection of the interface is done via DIP switches, HTTP/SNMP, or command line interface (CLI).

The T1 interface is an eight position keyed modular jack configured as a RJ-48C for connection to 100-ohm twisted pair lines.

Figure 10. 3086 T1 port pinout

T1 Interface Connection

The 3086 will usually connect either to a local T1 device, or to a Telco terminated T1 line jack.

To connect the 3086’s T1 port to a local T1 device ( PBX, router, mux) use a T1 ‘crossover’ twisted pair cable. A crossover cable connects the transmit pins of the Model 3086’s T1 port to the receive pins of the device attached to this port and vice versa. Check the third party T1 equipment documentation for pinout information and cable requirements.

To connect the 3086’s T1 port to a Telco terminated T1 line jack, use a straight through twisted pair patch cable. Consult with your T1 service provider for exact pinout information and cable requirements.

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T1 Interface

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Patton electronic 3086 manual T1 Interface Connection