NEC NEAX2400 system manual Specifications on Release 2 or earlier software

SYSTEM CONFIGURATION

System Considerations

Condition 9: The maximum of data link speed is “1.5 Mbps.”

Condition 10: Connection Trunks (B ch) conform to the following specifications:

•Existing external trunk cannot be used as alternate routes for connection trunks.

•Billing information on connection trunks cannot be output.

•Under the following conditions, “connection trunk seizure NG” will occur: Data Link Failure

Connection Trunk all busy LANI (built-in) - FCH failure

•Connection test for connection trunks is not provided.

•Nailed Down connection is not provided for connection trunks.

Specifications on Release 2 or earlier software:

•PAD value for connection trunks is fixed to 0 db.

•Echo canceller (EC) / MPC control is not provided.

•Nailed Down connection is not provided for connection trunks. Condition 11: If a “ layer 2 failure” occurs, the connections are released.

Condition 12: When fusion links and CCIS links coexist on a Fusion network, the following conditions should be considered:

A Fusion link may be used as a CCIS link through data programming. In this instance, if the other node accommodates a dedicated CCIS card, CCIS will not work even if the self-node accommodates a Fusion- Link-Card. Therefore, the same Fusion-Link-Card must be accommodated at both nodes. Figure 3-13shows an example of CCIS-FUSION networks.

ND-70185 (E)CHAPTER 3

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