Nortel Meridian 1 option 11C Planning And Installation Manual page 54

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A Modem Eliminator (NULL Modem without hardware handshaking)
A0601397 F-F converter or A0601396 M-F converter may be required to
interface the TTY to the system.
The following outlines the minimum requirements for a TTY device:
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The minimum requirement is a VT100 compatible device when Meridian
Mail is not installed, and will not be installed in the future.
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With Meridian Mail, use a VT220 compatible device.
Each system should be equipped with an M2616 or M2008 telephone with a
display assigned as a maintenance telephone.
A variety of TTY terminals can be used to access the Option 11C. However,
a VT220 terminal is recommended as an on-site terminal. It can be used to
perform service changes, maintenance and diagnostic functions, as well as
Meridian Mail administration activities.
Although several types of modems can be used to access the system, a 2400
baud auto-answer modem is the recommended modem and 1200 baud is the
minimum. It can be used to perform service change, maintenance and
diagnostic functions, as well as Meridian Mail administration activities from
a remote location.
Note: Additional maintenance functions can be performed through
remote access on the Option 11C. For additional information, refer to
the Customer Configuration Backup and Restore Guide,
NTP 553-3011-330.
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