Verilink Access Manager 2000 (896-502037-001) Product Manua Uživatelský manuál stáhnout pdf (Strana 163)

Configuring nodes

Access Manager 2000 User Manual

Node Access Failure

If Access Manager returns a NO CIRCUITS AVAILABLE message or

an Access Manager FAILED TO ESTABLISH CONNECTION TO

THE NODE message, try to access the node once more. Verify that the

node is configured to be Installed and Operational.

If Access Manager still fails to access the node, refer to the following

paragraphs.

Dial-Up Connection: If the node uses a dial-up connection, verify

that the correct telephone number and Hayes



modem protocol (if

required) have been entered in the query path of the node definition

and that the node modem answers.

If the NO CIRCUITS AVAILABLE message appears, Access

Manager could not find an available modem to access the node. Use

the following steps to troubleshoot this error:

1. Verify that there is a Comline defined with the proper baud rate for

that modem. If the node is equipped with a 1200 baud modem and

you do not have a 1200 baud modem at the Access Manager site,

then configure the node in Access Manager for 2400 baud and let

the modems automatically downgrade when the connection is made.

2. If Access Manager fails to access the second or a successive node of

a multiple-node Access System 2000 or ConnecT1 Plus system, the

RS232 daisy chain from the first node to the desired node may be

faulty. Try accessing a preceding (lower-numbered) node in this

daisy chain. If the access to that node is successful, either the RS232

daisy chain is faulty and the originally requested node, or the NCC

2020 or CCC 1020 in the original node may be faulty.

3. If Access Manager still fails to access, repeat this step, going

gradually back toward the first Access System 2000 or ConnecT1

Plus node until the access is successful. If the RS232 daisy-chain

cabling is good, the master NCC 2020 or CCC 1020 may be faulty

in one of the nodes.

4. If Access Manager cannot access any node, verify that the

connected modem is properly configured, that the cabling is correct,

and that the Comline is configured correctly. Refer to the

appendices for cabling requirements, modem requirements, and

Comline requirements. Verify that all the following are true:

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Verilink Access Manager 2000 (896-502037-001) Product Manua Uživatelský manuál Strana 163