User Guide Modem 3460

3460 Fast’R
C-19
Status LEDs
Cards and stand-alone modems have the following front panel
indicators. On a dual-modem card, each modem has a set of indicators.
Vanguard 3460 V.34 Daughtercard modems have only the MR and OH
indicators
.
Status LED Displays
LED Description
MR
Modem Ready/
Test Mode
• On: modem is ready to interwork with computer
• Flashing: Modem is in V.54 test mode
TR
Transmit/Receive
(Data Terminal
Ready)
On: computer is asserting DTR (Circuit 108) to modem
OH
Off Hook (con-
nected to phone
line)/
Ring Indicator
On:
• Regular operation: modem is connected to dial line
• Restoral operation: when regular operation is
configured for leased-line or dial-line operation, and
modem is operating on restoral dial line: modem is
connected to dial line
Flashing: modem receiving Active Ring
Off:
• In dial configuration: no call in progress, modem is
disconnected from telephone line
• In leased-line configuration: modem is connected to
leased line
CD
DataCarrier Detect
On: modem is receiving a valid carrier signal from a
remote modem
RD
Receive Data
Flashing: modem is transferring data received from a
remote modem and command responses to computer
SD
Send Data
Flashing: modem receiving transmit data and
commands from computer