East Coast Datacom Nx8- Dual Composite MUX High-Speed 16-Port TDM Multiplexer, Operation Manual

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run at 512 Kbps on its assigned home link, and 32 Kbps when backed up on the alternate
link.
Table 3
1 6
24
12
12
96/24
24
12
96/24
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
hs hf ls lf
1
12/6
18
24/18
12
6
12
12
72/18
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
hs hf ls lf
316
34
236
68
LINK A: total user timeslots
remaining free timeslots
LINK B: total user timeslots
remaining free timeslots
High priority, seeking
hs:
ls:
Low priority, seeking
hf:
High priority, fixed
lf:
Low priority, fixed
Key
2.3.4.1 Example: Link A Failure
In this example, Link A, running at 128Kbps, provides 316 user channel timeslots (+4 for link
overhead). The total allocated timeslots over all 8 channels takes 282 timeslots, leaving 34
unused.
Link B runs at 96Kbps, provides 236 channel timeslots of which 168 are assigned and 68 are
unused.
The following figures detail sequentially what happens when a link fails. First considered will
be a failure on Link A.
Table 4
1 2
-16-
2
2
48/16
8
8
128/32
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
hs hf ls lf
1
12/6
24
18
24/18
12
6
12
12
72/18
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
hs hf ls lf
fail
0
236
44
LINK A: total user timeslots
remaining free timeslots
LINK B: total user timeslots
remaining free timeslots
6
24
12
12
96/24
24
12
96/24
In the first step in Table 4 above, the system attempts to find timeslots on Link B to backup
the high-priority channels seeking backup (failover mode=“hs”). It begins with channel #1 in