SWITCH SET SUMMARY TABLE
Position | Function | Factory Default | Selected Option | |||
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SW1 | Data Rate | On |
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SW2 | Data Rate | On |
| 1.536 Mbps | ||
| (DTE Rate) |
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SW3 | Data Rate | On |
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SW4 | Framing & Coding | Off |
| ESF/B8ZS |
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SW5 | DS Zero Rate | On |
| 64 kbps | ||
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SW6 | Clock Mode | Off |
| Network | ||
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SW7 | Line Build Out | Off |
| 0dB | ||
SW8 | Line Build Out | Off |
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Switches SW1, SW2, and SW3
Use Switches SW1, SW2 and SW3 to set the DTE data rate. Each setting represents an nx56/nx64 setting.
SW1 | SW2 | SW3 | Speed |
Off | Off | Off | Clear Channel (Unframed) |
On | Off | Off | 112kbps/128kbps |
Off | On | Off | 224kbps/256kbps |
On | On | Off | 336kbps/384kbps |
Off | Off | On | 448kbps/512kbps |
On | Off | On | 672kbps/768kbps |
Off | On | On | 896kbps/1024kbps |
On | On | On | 1344kbps/1536kbps |
Switch SW4: Line Framing and Coding
Use Switch SW4 to control the Network Line Framing and Coding Options. Set these options to be the same as the Line Framing and Coding Options given to you by your Service Provider. If you are using two Model 2710s together as short range modems, set both units iden- tically.
SW4 | Line Framing & Coding |
Off | ESF/B8ZS |
On | D4/AMI |
Line Framing Options:
D4/Superframe: The D4 framing format, as specified in AT&T TR62411 is the standard in which twelve frames make up a superframe. All signaling and synchronization are done in- band.
Extended Superframe: Extended Superframe, as specified in AT&T TR 54016, consists of
Line Coding Options:
Alternate Mark Inversion (AMI): This mode does not inherently account for ones density. To meet this requirement, each time slot can be reduced to 56 kbps and the Least Significant Bit (LSB) of each time slot set to one.
Bipolar 8 Zero Substitution (B8ZS): This mode assures proper bit density in the data stream. In this mode any data pattern can be transmitted without causing ones density errors. This mode allows for 64 kbps clear channel timeslots.
Switch SW5: DS0 Channel Rate
Use Switch SW5 to set the DS0 rate.
SW5 | Setting |
Off | 56 kbps |
On | 64 kbps |
9 | 10 |
