Compaq Armada 7300 33.6Kbps Modem Commands for Armada 7000 Family of Personal - Page 49

Link Layer Window Size S69, Maximum Retransmission s N400 S70, LAPM Break Control S82

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: 3 +,7( $3(5 (cont.) . . Bit 6 = Reserved . . Bit 7 = Reserved . . . Link Layer Window Size (S69) . This register sets the number of outstanding unacknowledged packets. Allowing a larger . number of outstanding packets may increase throughput on good quality communications . channels. Allowing a smaller number of outstanding packets may increase throughput on . . poor quality communications channels such as cellular channels. . . Range: 1-15 . . (Default): 15 . . Maximum Retransmission s (N400) (S70) . . . This register limits the number of times the modem will retransmit a frame. When the limit is reached, the modem will hang up. Allowing a higher number of retransmissions may . improve cellular communications, but may cause a longer delay before hanging up on good . quality communication channels. . . Range: . 0-255 . (Default): 12 . . . LAPM Break Control (S82) . This register provides a way for the user to get the attention of the remote modem. The break . type depends on the specific application. LAPM specifies three methods of break signal . . . handling: in sequence, expedited, and destructive. If an invalid number is entered, it is accepted into the S register, but S82 will act as if the default value has been entered. . . Range: 1, 2, 3, 4, 7, 8, 128 . . (Default): 128 . 3 or 4 Expedited: Modem sends a break immediately; data . . . integrity is maintained both ahead of and after the break. . 7, 8 Destructive: Modem sends a break immediately; data . being processed by each modem at the time of the . . break is destroyed. . 1, 2, or 128 In sequence: Modem sends a break in sequence with . any transmitted data; data integrity is maintained both . ahead of and after the break. . . . . . . . . . . . . . . 

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Bit 6 =
Reserved
Bit 7 =
Reserved
Link Layer Window Size (S69)
This register sets the number of outstanding unacknowledged packets. Allowing a larger
number of outstanding packets may increase throughput on good quality communications
channels. Allowing a smaller number of outstanding packets may increase throughput on
poor quality communications channels such as cellular channels.
Range:
1-15
(Default)
:
15
Maximum Retransmission s (N400) (S70)
This register limits the number of times the modem will retransmit a frame. When the limit
is reached, the modem will hang up. Allowing a higher number of retransmissions may
improve cellular communications, but may cause a longer delay before hanging up on good
quality communication channels.
Range:
0-255
(Default):
12
LAPM Break Control (S82)
This register provides a way for the user to get the attention of the remote modem. The break
type depends on the specific application. LAPM specifies three methods of break signal
handling: in sequence, expedited, and destructive. If an invalid number is entered, it is
accepted into the S register, but S82 will act as if the default
value has been entered.
Range:
1, 2, 3, 4, 7, 8, 128
(Default)
:
128
3 or 4
Expedited: Modem sends a break immediately; data
integrity is maintained both ahead of and after the
break.
7, 8
Destructive: Modem sends a break immediately; data
being processed by each modem at the time of the
break is destroyed.
1, 2, or 128
In sequence: Modem sends a break in sequence with
any transmitted data; data integrity is maintained both
ahead of and after the break.