NEC NEAX 2000 IVS User Manual page 40

Modem Connection
Action: Listen to the modem while it dials to
determine that no dial tone was present.
Reasons:
Action: Listen to the modem after it dials to
determine that no ringing occurred.
Reason: Incorrect phone number (too short)
Action: Listen to the modem while it dials to
determine that the call was answered.
Reasons:
Action: Listen to the modem while it dials to
determine that it kept ringing.
Reasons:
MATWorX 32 User's Guide
NDA-24215 Revision 1.0
No Dial Tone
PC modem's power is off (external only)
PC modem's telephone line is not active or
not properly plugged in
PBX configuration indicates the wrong PC
COM port
PBX Configuration indicates a Direct setting
when the connection is really Modem
External modem data cable is not properly
connected to the PC
External modem data cable is defective
Telephone line cable is defective
No Ringing
Ringing followed by a voice answer or a
recorded message
Too many digits were entered for the phone
number
Incorrect digits
Incorrect access code
Incorrect area code
Ringing, But No Answer
Incorrect phone number
PBX Port 1 is not set for the built-in PBX
modem
Getting Started
Page 33