Robotics Sportster Flash x2 Manual de usuario descargar pdf (Pagina 6)

4. Ensure that the S-registers are set properly.

For troubleshooting and other control reasons there are S-Registers employed that can

shut off x2 or features that are required for x2. Essentially, you need to ensure that:

a) x2 is not disabled and

b) V.8 is enabled.

Under normal circumstances, entering AT&F1&W will enable this. If you are working

with an upgraded Courier, ensure that the higher registers (such as S69 and S70) are not

255, they should usually be 0. This is a common issue with upgrades.

Courier Analog V.Everything

S58=0 x2 is enabled, etc.

S54=64 3200 symbol rate is enabled, v8 CI disabled, etc.

&N0 Don't limit the upper speed

&U0 Don't limit the lower speed

Sportster 56K

S32=2 x2 is enabled (note: NOT S32=0, this disables V.8,

which effectively disables x2!!!!)

5. Ensure that the analog line is capable of x2.

There are a couple ways to do this, and none are 100% reliable. Keep in mind that this

is currently an art, not a science. These techniques represent the best we can do without

sophisticated measuring equipment and on-site evaluation.

n Ensure that you are NOT dialing from a PBX line. (PBXs are less likely to support

x2.)

n Dial into the U.S. Robotics “Socrates” server at 888-877-9248. Log in as x2 test.

A program analyzes the line and reports Yes or No and gives a frequency response

from the perspective of the Socrates server. Make several calls to ensure a consistent

result.

n Dial into an x2 host from a terminal program. Set S14=0 prior to dialing to prevent

a disconnect on escape. At the “login” prompt (or whatever is displayed after

connect) type +++ to get to the modem’s command prompt. While still online, enter

(and capture the results if possible): ATI4I6I7I11Y11

n Send ATI4I6I7I11Y11again after 45-60 seconds online. This will show the true

“settle-in” speed, as the first thirty seconds or so might be slightly erratic.

Freq Level

150 20

300 16

...

3300 11

3450 13

3600 17

3750 23

Results of the Y11 Command.

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Robotics Sportster Flash x2 Manual de usuario Pagina 6