Emulex DCP_link - Manual (Page 99)

7-6 Chapter 7
Maximum Frame Size (Nl) - Determines the maximum frame size (in
octets) allowed to be received on the link. It is automatically configured
from the packet size and maximum packet size information.
Retry Count (N2) - Determines the maximum number of times a frame
should be retransmitted because of the expiration of the Retry Timer (Tl).
A large value for this parameter increases the probability of a correct
transfer between the DTE and DCE. A small value permits faster
detection of a permanent error condition.
Retry Time-out (TI) - Determines the time, in seconds, to wait for an
acknowledgment of the oldest transmitted frame. If no acknowledgment
is received within this set time, an attempt is made to determine the status
of the remote device.
Disconnect Time-out (T3) - Displays the value of the T3 timer. After
attempting to connect the link by sending N2 Set Asynchronous
Balanced Mode (SABM) frames on TI expiration, the Data-Link layer
continues sending SABM frames when the T3 timer expires. This setting
isn’t configurable.
Idle Time-out (T4) - Specifies the amount of time the local DTE waits
(when a link becomes idle) before attempting to poll the partner node for
status. If the partner node does not respond to the polls, the link is reset
and all current virtual calls are cleared or reset. This setting isn’t
configurable.
Frame Node Type - The X.25 frame level configures DCE/DTE
protocol handshaking. Generally, an X.25 service provider will require
DTE.
Packet Level Parameters
Local DTE Address- Specifies the X.25 address (up to 15 digits) of the
local DTE. It should match the address assigned by your attached
network. This address is included in the Calling Address field of the
outbound Call Request packets.
Version - Emulex X.25 specifically supports 1984 CCITT X.25
Recommendation
Role - Determines whether you use DTE or DCE procedures for packet
layer operation in the Logical Channel Number (LCN) assignment.