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Maximum Delay Buffer
for NxDS0 Interfaces
Because NxDS0 interfaces carry
less bandwidth than a T1 or E1 interface, the buffer size on an NxDS0 interface can be relatively larger, depending on
the number of DS0 channels combined. The maximum delay buffer size
is calculated with the following formula:
- Interface Speed * Maximum Delay Buffer Time = Delay Buffer
Size
For example, a 1xDS0 interface has a speed of 64 kilobits
per second (Kbps). At this rate, the maximum delay buffer time is
4,000,000 microseconds. Therefore, the delay buffer size is 32 kilobytes
(KB):
- 64 Kbps * 4,000,000 microseconds = 32 KB
Table 33 shows
the delay-buffer calculations for 1xDS0 through 32xDS0 interfaces.
Table 33: NxDSO
Transmission Rates and Delay Buffers
|
Interface Speed
|
Delay Buffer Size
|
| 1xDS0 Through
4xDS0: Maximum Delay Buffer Time Is 4,000,000 Microseconds |
|
1xDS0: 64 Kbps
|
32 KB
|
|
2xDS0: 128 Kbps
|
64 KB
|
|
3xDS0: 192 Kbps
|
96 KB
|
| 4xDS0 Through
7xDS0: Maximum Delay Buffer Time Is 2,000,000 Microseconds |
|
4xDS0: 256 Kbps
|
64 KB
|
|
5xDS0: 320 Kbps
|
80 KB
|
|
6xDS0: 384 Kbps
|
96 KB
|
|
7xDS0: 448 Kbps
|
112 KB
|
| 8xDS0 Through
15xDS0: Maximum Delay Buffer Time Is 1,000,000 Microseconds |
|
8xDS0: 512 Kbps
|
64 KB
|
|
9xDS0: 576 Kbps
|
72 KB
|
|
10xDS0: 640 Kbps
|
80 KB
|
|
11xDS0: 704 Kbps
|
88 KB
|
|
12xDS0: 768 Kbps
|
96 KB
|
|
13xDS0: 832 Kbps
|
104 KB
|
|
14xDS0: 896vKbps
|
112 KB
|
|
15xDS0: 960 Kbps
|
120 KB
|
| 16xDS0 Through
32xDS0: Maximum Delay Buffer Time Is 500,000 Microseconds |
|
16xDS0: 1024 Kbps
|
64 KB
|
|
17xDS0: 1088 Kbps
|
68 KB
|
|
18xDS0: 1152 Kbps
|
72 KB
|
|
19xDS0: 1216 Kbps
|
76 KB
|
|
20xDS0: 1280 Kbps
|
80 KB
|
|
21xDS0: 1344 Kbps
|
84 KB
|
|
22xDS0: 1408 Kbps
|
88 KB
|
|
23xDS0: 1472 Kbps
|
92 KB
|
|
24xDS0: 1536 Kbps
|
96 KB
|
|
25xDS0: 1600 Kbps
|
100 KB
|
|
26xDS0: 1664 Kbps
|
104 KB
|
|
27xDS0: 1728 Kbps
|
108 KB
|
|
28xDS0: 1792 Kbps
|
112 KB
|
|
29xDS0: 1856 Kbps
|
116 KB
|
|
30xDS0: 1920 Kbps
|
120 KB
|
|
31xDS0: 1984 Kbps
|
124 KB
|
|
32xDS0: 2048 Kbps
|
128 KB
|
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