Adtran 3000 Manual do Utilizador descarregar pdf (Página 88)

Chapter 7. Installing an Analog Modem

7-6 Express 3000 User Manual 61203153L2-20

When carrier detect (CD) is active (i.e., a call is connected) on the ex-

ternal analog modem, the Express 3000 will not switch control from

the modem port when you attempt to disable it. The call must be

hung-up (disconnected) to deactivate CD, before you can switch con-

trol from the modem port and disable it.

INTERNAL ANALOG MODEM APPLICATION

The following items are necessary to connect an internal analog mo-

dem to the Express 3000:

• Internal analog modem

• RJ-11 to RJ-11 telephone cable

When using an internal analog modem with the Express 3000, two

COM ports are assigned on the PC and configured independently. See

the manufacturer's documentation for internal analog modem config-

uration.

Figure 7-2 on page 7-7 illustrates the connections for installing an in-

ternal modem to the Express 3000.

Using VT-100 Terminal Emulation to Enable/Disable the Modem

To do this... Enter this AT Command

Enable modem

AT_L1

and press the

Enter

key

Disable modem

AT_L0

and press the

Enter

key

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Adtran 3000 Manual do Utilizador Página 88