beautypg.com

Verilink 9000 Series (34-00271) Product Manual User Manual

Page 181

background image

Configuration / Operation

159

Baud Rate

This is the rate, in bits per second, at which the port communicates. The selections
are 300, 1200, 2400, 4800, 7200, 9600, 12000, 14400,16800, 19200, 24000,
28800, 38400, and Auto.

Bits per Character

The number of valid data bits in each byte is represented in this field. The
selections are 7 and 8.

Parity

Parity selections can be Odd, Even, or None. Setting the parity of a data byte is
done by marking the most significant bit (MSB) either on or off so that the total
number of on bits is either an odd or even number. Odd and even parity are used
when the Bits per Character parameter is set to 7. When 8 bits per character are
used then the parity is set to None. Odd parity should be used on sync lines, while
even parity is used on async. The selections are O (odd), E (even), and N (none).

Message Buffer

The message buffer represents the number of internally transferred bytes the port
accumulates before beginning to transmit the data to the attached device. If the
current port speed is less than or equal to the speed of the port transferring the
data, this parameter can be set to 100. If the current port speed is faster than that of
the transferring port, this parameter must be greater than the largest possible
message size. This acts as a fast output option. When set to 100, the message is
sent to the terminal device while it is still being received from the host. When set
to a value greater than the actual message size, the entire message is received from
the host before being sent to the terminal device. If any terminal on this port is
linked to a port using a transport protocol such as X.25 or Frame Relay, set this
parameter to 4096. The selections are 10 to 4096.

Interface

This determines the interface type of the port. The selections are S (sync), A
(async), T (TDI), and V (V.35).

Offline Timeout

The offline timeout indicates the maximum time the unit waits, with no traffic
from the host, before declaring the port offline. When the port is declared offline,
all stations connected to that host are logically disconnected. The selections are 1
to 655, 30.

Termination

The termination parameter relates to the 9000 series product only. It sets the port
for DCE (data communication equipment) or DTE (data terminal equipment).

Trailing Pad Characters

Pad characters are dummy characters sent at the end of a synchronous transmission.
A value of 2 is the only allowable selection. All others are ignored. the default is
Sync - 2.