Modem Configuration Screen did Modem | Multi-Tech Systems FF110

Modem Configuration Screen – DID Modem

“Modem Configuration: DID Modem” Screen Field Definitions

Field Name	Values	Description

Max DID Digits	2-7	The number of digits that the telco supplies to the
		DID line when an incoming call is received.
		Default = 4.
FAX ID	alphanumeric;	The value in this field is usually the phone
	20 characters,	number of the line to which the DID modem is
	max.	attached. However, any alphanumeric string up
		to 20 characters is allowed. Sometimes
		company names or abbreviations are included in
		this string. This ID number will appear in the
		sender’s fax log.
Max Baud Rate	2400 – 33,600 bps	The value in this field determines the maximum
		baud rate used for fax calls on the DID modem.
		It is typically set at less than 33,600 bps only if
		there are quality problems with the phone line.
		Default = 33,600 bps
Polarity	A or B	Orientation of DID battery voltage. DID lines are
		polarity sensitive. The polarity of the battery
		voltage on the DID line is very important for the
		DID line to work properly. Since the line comes
		from the telcom as an unmarked twisted pair, the
		required polarity can only be determined through
		trial and error. The modem is set by default to
		Polarity A. If an immediate busy signal is
		received when a DID number is dialed, or if the
		call is dropped shortly after connecting, then the
		battery polarity is probably wrong and the
		opposite battery voltage polarity should be tried.
		Default = A

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