300 BPS Internal Modem  (250-1003)     Appendix        Faxback Doc. # 4482

MODEM DIALING SPEEDS

You have the flexibility of controlling the dialing speed when using the 
Auto Dial feature of the modem board. The two types of dialing are Pulse 
(Rotary), and Tone. Each type can be specified as either fast or slow. The 
dialing speeds are applicable only when you are using the modem in the 
Automatic/Originate Mode. The following contains information on the speeds 
at which you can control dialing:

SLOW (S)
In Slow speed, the modem will Pulse dial at 10 pulses per second and will 
Tone dial at 5 characters per second. Pulse or Tone dial is significantly
faster than dialing a telephone number manually. The information in Table 2
below, illustrates the capacities of Slow dialing.

              ┌────────────────────────────────────────────────┐
              │            DIALING USING SLOW SPEED            │
              ├─────────┬───────────────────────┬──────────────┤
              │ Pulse:  │    Break Time         │    63.0 mSEC │
              │         │    Make Time          │    37.0 mSEC │
              │         │    Intra Digit Time   │   700.0 mSEC │
              │ Tone:   │    Tone On Time       │   100.0 mSEC │
              │         │    Tone Off Time      │   100.0 mSEC │
              └─────────┴───────────────────────┴──────────────┘
                                   TABLE 2

FAST (F)
In Fast speed, the modem will Pulse dial at 20 pulses per second and will 
Tone dial at 10 characters per second. The information in Table 3 below, 
illustrates the capacities of Fast dialing.

              ┌─────────────────────────────────────────────────┐
              │            DIALING USING FAST SPEED             │
              ├─────────┬───────────────────────┬───────────────┤
              │ Pulse:  │    Break Time         │     31.5 mSEC │
              │         │    Make Time          │     18.5 mSEC │
              │         │    Intra Digit Time   │    390.0 mSEC │
              ├─────────┼───────────────────────┼───────────────┤
              │ Tone:   │    Tone On Time       │     50.0 mSEC │
              │         │    Tone Off Time      │     50.9 mSEC │
              └─────────┴───────────────────────┴───────────────┘
                                   TABLE 3

(abo-07/28/93)