US Robotics COURIER - Page 165

COURIER HIGH SPEED MODEMS
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Software:
Initially 19.2K
or 38.4K bps, allowing the following
range of link rates:
14.4K/12K/9600/7200/ 4800/2400/1200/300/110
- bps
Modem:
Xl or higher (rate-specific CONNECT codes) &BO
(variable DTE rate) &NO (variable link rate)
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Example
-
Modem DTE/DCE
Action Response
Rate
-
1. Power on.
19,200
2.
300-bps call comes in. RING 19,200
CONNECT
19,200
-
3.
Data link is established. 300
Data transfer takes place.
-
4. Data session is over. NO CARRIER 300
Call is
ended; loss of
carrier.
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5. 2400-bps call comes in. RING
300
CONNECT 2400
300
6. Data link is established. 2400
-
Data transfer takes place.
7. Data session is over. NO CARRIER 2400
-
Call is ended; loss of
carrier.
8. 14.4K-bps call comes in. RING 2400
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CONNECT 14400 2400
9. Data link is established. 19,200
-
Data transfer takes place.
10.
Data session is over. NO CARRIER 19,200
Call is
ended; loss of
-
carrier.
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E-14 Fax and Other Operations
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