Multitech MR9600-100 Guía de usuario descargar pdf (Pagina 39)

4 Organizing and Configuring Your Modems

• “How to Move a Modem between Modem Groups” on page 27.

• “How to Set Modem Group Configuration Settings” on page 33.

What types of phone lines are the modems connected to?

There are two basic types of analog phone lines: leased lines (two-wire and four-wire) and dial-up

lines. CommPlete Communications Servers have only digital T1 or ISDN PRI termination.

Leased-lines are always connected directly at both ends, so the modems must be configured for

leased-line operation by setting the Modem General Setup settings to 2-wire Leased Line or 4-

wire Leased Line as required. You also must set the modem to Answer or Originate, whichever is

the opposite of what the modem on the other end is set to. Some modems can be connected to both

a leased line and a dial-up line, so that if the leased line fails and the modem is set to Dial-Backup,

it will call the other modem on the dial-up line to reestablish the connection.

Note: Make sure that the modem group the leased line modem is in is set to configure the modem

on reset and disconnect. This is because if the leased line drops or the modem is reset, it will not try

to reestablish the connection until it is configured again.

Dial-up lines on host systems used for inbound calls are usually put into some sort of call pool.

That is, one phone number may be used to call a group of phone lines (which are connected to a

group of modems). When the phone number is called, the first non-busy line is used to handle the

incoming call. Modems that are connected to such a call distribution should be set out-of-service

(go off-hook) when the device connected to its serial port is inactive. This ensures that incoming

calls will not roll over to this inactive device. One way to do this is to set up the S36 and S37

registers in the modem configuration file so that when DTR is not high, the modem will auto-

matically go out-of-service. See the ISP.TXT file in the MRACK directory or folder.

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Multitech MR9600-100 Guía de usuario Pagina 39