Public Switch Line Cable; Pc Modem Initialization String - Nortel Meridian Companion PCI User Manual

Public switch line cable

PC modem initialization string

P0886303 Issue 01 Standard
Note: The pin numbers above assume there is a 25-pin connector in
the RAD external modem.
• to connect the PC modem and the RAD external modem to the
public switch
• cable recommended or provided by the modem manufacturer
The default PC modem initialization string is ATE0Q0V1X4
S7=90. Your PC modem must meet the following configuration
requirements. If your modem's built-in capabilities do not meet
these requirements, move the dipswitches. The configuration
requirements are:
• echo off (E0)
• enable responses (Q0)
• verbose responses (V1)
• full responses (X4)
• carrier detect delay (S7=90); time setting is variable.
This parameter directs the PC modem to wait the specified time
(in this case 90 seconds) for the far end carrier (either the RAD or
an external modem on the RAD) to answer and send carrier tone.
For each ring that occurs before the far end answers, seven
seconds should be added to the S7 parameter. For example, if the
RAD is programmed to answer automatically after six rings, then
S7 should be set to 42 (= 6 x 7) seconds. Note that modems
support different upper limits for the S7 parameter, and many
modems do not allow it to be more than 55 seconds. If your
modem is limited to 55 seconds for example, then the RAD must
be programmed to answer automatically within less than eight
rings. Consult your modem manual for possible limitations on the
S7 parameter.
• modem port flow control disabled (\G0), serial port flow control
disabled(\Q0).
These parameters direct the modem to disable flow control.
These parameters are not currently included in the default
initialization string because they are not supported by all
modems. If your modem defaults to flow control enabled, or is
programmed via dip switches to enable flow control, then include
these parameters in the initialization string.
Companion Diagnostic Software for PCI User Guide
Appendix A 103