Robotics Sportster Flash x2 Manual de usuario descargar pdf (Pagina 11)

Appendix A - Courier x2 Status Messages

These messages come from the x2 status field of the I11 screen after an x2 call attempt

that failed to achieve x2 modulation. As of late April 1997, this functionality exists only

in Courier modems. It is planned to be implemented for other products in maintenance

releases.

Channel is x2-capable but

feature not installed

The user has the proper x2 firmware installed, is

calling an x2-capable server, and the line is good,

BUT the user did not enable the “x2 feature”

properly (x2 does not appear under Options in the

ATI7 screen).

Solution: First, power the modem off and then on

again (the final step in enabling x2) and try the call

again. It’s also possible that x2 was not enabled

properly in the modem. See Appendix B for

instructions on enabling the Courier modem.

x2 disabled on local modem

S-Register 58 enables/disables x2.

Solution: Make sure S58=0 to enable x2.

Remote modem is not x2

The modem that the user is calling (or is answering

from) is not an x2 modem. Make sure the POP is

x2-capable.

Multiple CODECs in channel

Either there are multiple analog-to-digital

conversions in the network path, or some other

anomaly is causing high-end rolloff (a dramatic

reduction of signal power at frequencies above 3300

Hz). This is often caused by an additional analog-to-

digital conversion on the local loop, but it should be

noted this additional ADC could be anywhere in the

call path. x2 does not work in either circumstance.

Remote modem is not a Server

The user has called another x2 client (such as

another x2 Courier V.Everything or an x2

Sportster). One end of the connection must be a

digitally served x2 server. Calls from x2 client to x2

client will attain V.34 speeds.

3200 baud disabled on local

modem

Solution: Enable the 3200 symbol rate by setting

S54=64 (enables 3200 symbol rate, disables V.8

Call Indicate, etc.).

Channel will not support 3200

baud

The channel is not capable of supporting 3200

symbol rate -- an x2 requirement. It is likely that

this is caused by severe impairment on the analog

local loop (other than multiple codecs).

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