User's Manual

ND-70185 (E) CHAPTER 3
Page 17
Revision 3.0
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 3-13
shows an example of CCIS-FUSION networks.