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 3086 for internal or external clock mode.

S3-3

Clock mode

 

 

Off

Internal. Transmit clock generated by the 3086

On

External (network). DSL and E1 transmit clock derived from the received E1 signal

 

(available in CO mode only)

 

 

Switch S3-6: Annex. Annex A and B offer spectral compatibility with T1 and E1 signals respectively, this fea- ture reduces the interference between DSL lines and adjacent E1or T1 lines. For regions where E1 is used, select Annex B.

S3-6

Annex

 

 

Off

Annex A

On

Annex B

 

 

Switch S3-7.Use S3-7 to configure the TDM interface for T1 or E1 service. Note that selecting E1 automati- cally sets the E1 line rate to HDB3, line impedance to 120-ohms. Selecting T1 automatically sets the framing to Extended Super Frame and B8ZS line code.

S3-7

Configuration

 

 

Off

E1 mode (HDB3)

On

T1 mode (ESF/B8ZS)

 

 

Switch S3-8.Switch S3-8 applies to E1 applications only. This switch selects whether the E1 link will use CRC or not while in framed mode. In Clear Channel mode (unframed) this switch is ignored.

S3-8

Setting

 

 

Off

E1 with CRC

ON

E1 without CRC

 

 

52

E1 Interface

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Image 52
Patton electronic 3086 manual S3-8 Setting