Port Specifications - Avaya Nortel Communication Server 1000 Reference

An address conflict may occur between the MSDL and other cards because of truncated
address decoding by the other cards. For example, if a DCHI port is set to address 5, it's
companion port is set to address 4, which means that none of the MSDL cards can have
hexadecimal address numbers 05H, 15H, É75H, nor addresses 04H, 14H, É74H. To avoid this
conflicts system software limits the MSDL card addresses from 0 to 15.

Port specifications

The MSDL card provides four programmable serial ports configured with software as well as
with switches for the following modes of operation:
Transmission mode:
Configure an MSDL port for synchronous or asynchronous data transmission using LD 17.
Synchronous transmission uses an external clock signal fed into the MSDL.
Table 142: Synchronous interface specifications
specifications and the means of configuring the interface parameters.
Table 142: Synchronous interface specifications
Parameter
Data bits
Data rate
Transmission
Clock
Interface
Mode
Asynchronous transmission uses an internal clock to generate the appropriate baud rate for
serial controllers.
Table 143: Asynchronous interface specifications
specifications and the means of configuring interface parameters.
Table 143: Asynchronous interface specifications
Parameter
Data bit, parity
Circuit Card Reference
Specification
In packets-Transparent
1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 48, 56,
and 64 kbps
Full Duplex
Internal/External
RS-232
RS-422
DTE or DCE
Specification
7 bits even, odd or no parity, or 8
bits no parity
on page 325 lists the synchronous interface
Configured
N/A
Software
N/A
Software
Software
Switches
Switches
on page 325 lists asynchronous interface
Configured
Software
Engineering guidelines
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