CHAPTER 3
NDA-24299
Page 28
Revision 1.0
3.4.2
Central Office Incoming Call (Ring Down)
Each node can specify a terminating node for Ring Down calls using the system data. In this example,
Node A and Node D specify Node C and Node E as the terminating node respectively. The terminating
node is assigned with use of the ASYDL command (SYS 1, Index 640). Note that self-FPC is assigned
at the terminating node. See
Note 1:
When assigning the data regarding the call termination to ATT, be sure to develop the unified data at each
node.
Note 2:
Terminating node cannot be assigned differently at each tenant (TN).
Note 3:
When the connection routes (C_RT) are all busy, any attempted call via C.O. Line is not connected to the
ATT. As a result, the calling party is provided with the ringback tone, and even when a C_RT later becomes
idle, the ringback tone connection is still maintained, and the C.O. call does not terminate to the ATT.
Figure 3-20 Ring Down Calls on a Fusion Network
Node A
Node B
Node C
Node D
Node E
: Node having ATTCON
: Node w/o ATTCON
PSTN
PSTN
PSTN
FPC = 1
FPC = 3
ASYDL - Node A
Index 640
FPC = 3 (Node C)
Node providing ATTCON/DESKCON
FPC = 4
FPC = 5
Fusion Network
Data Programming (Node A)
Data Programming (Node D)
Data Programming (Node C)
Ring Down Call
Ring Down Call
Ring Down Call
ASYDL - Node C
Index 640
FPC = 3 (Node C)
self-node FPC
ASYDL - Node D
Index 640
FPC = 5 (Node E)
Node providing
ATTCON/DESKCON