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Baud Rate & Timing

How to determine Baud Rate

The baud rate, or bits per second (bps), is an indicator of how fast the paging terminal processes and sends information for a particular pager. Pagers using a digital format (all current pagers) are set to accept information at one of the following speeds: 512 baud; 1200 baud; 2400 baud; FLEX 1600, 3200, or 6400. The faster the baud rate, the more information can be processed and sent by the paging terminal.

The baud rate of a pager indicates the "signaling speed" of the unit. It is the rate at which the information is broadcast from the transmitter to the pager. This information is needed to determine the timing of the pager.

Timing

Timing synchronizes the radio transmission with the paging receiver.
  • 512-baud pagers will have a timing that begins with a 2
  • 1200-baud pagers will have a timing that begins with a 3
  • 2400-baud pagers will have a timing that begins with a 4
  • Flex baud pagers will have a timing that begins with a 5


Alpha Timing Charts

Pager Format

Pagers have internal formats to accept certain types of pager numbers. The coding is done by groups of four. The coding is represented by two letters, A (Alpha) and N (Numeric)

Example: NNAA = Pager will accept Two Numeric Numbers and Two Alpha Numbers

To determine the timing locate the chart that matches the coding of the pager
(Note: there is no indication on the physical pager for format- it's internally programmed)


AANN        
Number Format First Second Third Fourth
Golay (512 Baud) 251 252 253 254
Pocsag (1200 Baud) 351 352 353 354
Pocsag (2400 Baud) 451 452 453 454
Flex 551 552 553 554
 
AAAN        
Number Format First Second Third Fourth
Golay (512 Baud) 255 256 257 258
Pocsag (1200 Baud) 355 356 357 358
Pocsag (2400 Baud) 455 456 457 458
Flex 555 556 557 558
AAAA        
Number Format First Second Third Fourth
Golay (512 Baud) 259 260 261 262
Pocsag (1200 Baud) 359 360 361 362
Pocsag (2400 Baud) 459 460 461 462
Flex 559 560 561 562
 
ANNN        
Number Format First Second Third Fourth
Golay (512 Baud) 263 264 265 266
Pocsag (1200 Baud) 363 364 365 366
Pocsag (2400 Baud) 463 464 465 466
Flex 563 564 565 566
NAAA        
Number Format First Second Third Fourth
Golay (512 Baud) 267 268 269 270
Pocsag (1200 Baud) 367 368 369 370
Pocsag (2400 Baud) 467 468 469 470
Flex 567 568 569 570
 
NNAA        
Number Format First Second Third Fourth
Golay (512 Baud) 271 272 273 274
Pocsag (1200 Baud) 371 372 373 374
Pocsag (2400 Baud) 471 472 473 474
Flex 571 572 573 574
NNNA        
Number Format First Second Third Fourth
Golay (512 Baud) 275 276 277 278
Pocsag (1200 Baud) 375 376 377 378
Pocsag (2400 Baud) 475 476 477 478
Flex 575 576 577 578
 
ANAN        
Number Format First Second Third Fourth
Golay (512 Baud) 287 288 289 290
Pocsag (1200 Baud) 387 388 389 390
Pocsag (2400 Baud) 487 488 489 490
Flex 587 588 589 590
Numeric Timing Chart
DIGITAL        
1200 Baud 316 317 318 319
2400 Baud 416 417 418 419
Flex (6400 Baud) 516 517 518 19