Eicon Networks C21 Guide d'installation télécharger pdf (Page 134)

HDLC Status 134

Addressing

Indicates whether the monitored Eiconcard port is configured

as a DTE (data terminal equipment) or a DCE (data circuit-terminating

equipment).

Check point timer T1 (msec)

When this timer expires, an attempt is made

to determine the status of the remote device.

Link setup

Controls how the HDLC Link setup procedure is handled. Note

that if both ends are PASSIVE, the link cannot be made.

Ack delay timer T2 (msec)

To optimize communications efficiency,

acknowledgments can be piggy-backed onto outgoing frames rather than being

sent out on their own. This field defines the length of the wait for an outgoing

information frame.

Maximum retry count N2

Specifies the limit to the number of retries

made when a particular frame meets with repeated negative acknowledgments

from the remote device.

Idle probe timer T3 (msec)

When this timer expires, an RR (receiver

ready) frame (has a command P-bit set) is sent to determine the status of the

remote device. If the remote device is still functioning it will respond with an

RR frame (has a command F-bit set) as well.

Maximum window size (K)

Number of frames that can be sent before

waiting for an acknowledgment. Maximum window size can never be

exceeded.

Maximum frame size N1(bytes)

Indicates the maximum size of the

HDLC frame.

Value Description

DTE Used when the Eiconcard port is connected to an X.25 network, or to

another computer configured as DCE (null-modem connection).

DCE Used when the Eiconcard port is connected to another computer which

is configured as DTE.

Value Description

Active The Eiconcard port initiates the setup procedure.

Passive The Eiconcard port waits for the other side to initiate the setup

procedure.

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 214 215

Pas de commentaire

Eicon Networks C21 Guide d'installation Page 134