Modem Setup Requirements - Nortel Meridian 1 Planning And Installation Manual

Page 252 of 590
Chapter 15 — Installing and connecting SDI and ethernet ports

Modem setup requirements

Modems connected to the Option 11C Mini are set as follows:
•
•
•
The ports on the Option 11C Mini are disabled if devices connected to the
ports generate additional "garbage" characters. For this reason, do not use
modems in the following modes:
•
•
•
Table 29 lists some of the problems that can be related to modems.
Table 29
Modem problems
Problem
CDR is not printing on an ESDI port
configured as 8 bits, no parity, and 1 stop
bit.
Modem is not communicating with the
Option 11C Mini when the User is MTC,
BUG, or CTY
(The default setting of 8 bits, no parity, 1
stop bit is incompatible with the modem).
553-3021-209 Standard 1.00
Carrier Detect (CD): Active if carrier detected on incoming call
Clear to Send (CTS): Normal operation or forced active
Hardware and software: Disabled flow control
Loopback
Auto Echo
Self Test
Note: The SDI ports are designed for use with "dumb" modems.
"Intelligent" modems can be used. Make sure that the modems do not
enter into modes of operation that send additional characters to the
system.
July 1999
Solution
Change the modem set-up to 7 bits, no parity, 1
stop bit, or add MTC or SCH to the ESDI user
prompt.
Change the modem set-up to 7 bits or the parity
to EVEN/ODD.