Figure 65. Drop And Continue D/C A Ins A; Figure 66. Drop And Continue D/C A Ins B - Alcatel 1850 TSS-320 Technical Handbook

LINE PORT
Input
Output
LINE PORT
Input
Output
The "Drop and Continue" featuring two connected SNCP rings (with dual node connection) is indicated
in Figure 67.on page 119. It shows the connection of a path signal between the two nodes 1 and 8.
The relevant path signal is:
The relevant path signal is:
connected in Drop and Continue (D/C A - INS A) in nodes 3, 4, 6 and 10.
connected in pass-through in nodes 2, 5, 7, 9.
connected in drop/ins protection in nodes 1, 8.
When in normal condition, the unidirectional way of traffic from 1 to 8 is supposed to be 1 -> 2 -> 3 -> 6
-> 7 -> 8.
After a failure on the 1st ring between nodes 2 and 3 (see Figure 68.on page 120), the link direction is:
1 -> 5 -> 4 -> 3 -> 6 -> 7 -> 8, with a switch on node 3.
After a second failure on the 2nd ring between nodes 6 and 7 (see Figure 69.on page 120) the selected
direction on the link is: 1 -> 5 -> 4 -> 10 -> 9 -> 8. The operative switch is on node 8 and the previous pass-
through between nodes 4 and 3 is no more used.
Alcatel 1850 TSS-320 Rel. 1.1
118/270 8DG 07734 AAAA Edition 01
SIDE A
Input Output

Figure 65. Drop and Continue D/C A INS A

SIDE A
Input Output

Figure 66. Drop and Continue D/C A INS B

LINE PORT
SIDE B
Output
Input
PORT
LINE PORT
SIDE B
Output
Input
PORT
Technical Handbook Common
Functional Description