Cabletron Systems TRMIM-10R, Руководство по установке

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CALCULATING RING LENGTH
Page C-13
3. Internal Drive Distance
4. Maximum Drive Limit
1. Actual Longest STP Lobe
Multiple Wiring Closets
(1263 feet for 4 Mbit/s or 569 feet for 16 Mbit/s)
(1) + (2) = (3)
2. Combined Trunk Length
(Sum of values for all closets, from Table below)
4 Mbit/sec 16 Mbit/sec
569 ft.
7. If you get a negative result, adjust
cable lengths or add active
components to the ring.
1263 ft.
5. External Trunk Cable Budget
6. Actual External Trunk Cable Length
4a. Internal Drive Distance
(from 3)
ft. 3.
2.
+ ft.
1. ft.
ft. 7.
4.
–
ft.
6.
5. ft.
ft.
–
STP CABLE LENGTH WORKSHEET
ft. 3.
2.
+ ft.
1. ft.
ft. 7.
4.
–
ft. 6.
5. ft.
ft.
–
Number of Number of Racks (Multiple Closets)
Concentrators 1 2 3 4 5 6 7 8 9 10
1 24
2 36 69 Values are Type 1
3 48 81 114 Equivalent in feet
4 60 93 126 159
5 72 105 138 171 204
6 84 117 150 183 216 249
7 96 129 162 195 228 261 294
8 108 141 174 207 240 273 306 339
9 120 153 186 219 252 285 318 351 384
10 132 165 198 231 264 297 330 363 396 429
11 144 177 210 243 276 309 342 375 408 441
12 156 189 222 255 288 321 354 387 420 453
13 201 234 267 300 333 366 399 432 465
14 213 246 279 312 345 378 411 444 477
15 225 258 291 324 357 390 423 456 489
16 237 270 303 336 369 402 435 468 501
17 249 282 315 348 381 414 447 480 513
18 261 294 327 360 393 426 459 492 525
19 273 306 339 372 405 438 471 504 537
20 285 318 351 384 417 450 483 516 549
21 297 330 363 396 429 462 495 528 561
22 309 342 375 408 441 474 507 540 573
23 321 354 387 420 453 486 519 552 585
24 333 366 399 432 465 498 531 564 597
25 378 411 444 477 510 543 576 609
26 390 423 456 489 522 555 588 621
27 402 435 468 501 534 567 600 633
28 414 447 480 513 546 579 612 645
29 426 459 492 525 558 591 624 657
30 438 471 504 537 570 603 636 669
31 450 483 516 549 582 615 648 681
32 462 495 528 561 594 627 660 693
33 474 507 540 573 606 639 672 705