
Page 460 of 906
NT7D16 Data Access card
553-3001-211 Standard 3.00 August 2005
Mode 15
This mode provides a “virtual leased line” and the meaning of the “Forced
DTR” switch is re-defined.
This mode should be selected when the DAC is connected to a terminal
(DTE) and continuous Hotline call origination is required. In this mode, the
DAC repeatedly tries to Hotline to the Autodial DN as long as DTR is ON.
This operation is similar to having a leased line feature, where the connection
between two extensions is always established. When the DAC tries to Hotline
to a busy Data Module, it activates Ring Again and the connection is
established as soon as the called unit is free. After establishing the data call,
if the called unit releases the call for any reason, the DAC automatically tries
to Hotline again to reestablish the call.
If the data unit being called does not answer the Hotline call, the DAC tries
to place another Hotline call once every 40 seconds until the called unit
answers. This mode is recommended only when a permanent connection
between a terminal and another data unit is required. The baud rate of the
Hotline call is determined by the AUTB and BAUD parameters in LD 11.
The status of CTS, DSR, and DCD is controlled in a similar manner as
described in mode 13.
Programing DAC for mode 15 in service change LD 11
The DAC must be configured as R232 since Autodial, Speed Call, and
Display commands are likely to be used.
Mode selection baud rates
The AUTB and BAUD parameters in LD 11 provide two functions for calls
originated from a DAC:
•
Provide a way to select a baud rate of a Hotline call. The DAC starts the
Hotline operation without receiving a <CR> for autobaud.
•
Set the DAC to operate at a fixed baud rate. The DAC does not return the
menu or Hotline unless a <CR> is received at the selected baud rate.
Normally the DAC should be selected to operate at autobaud.
Содержание Circuit Card
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Страница 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
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Страница 384: ...Page 384 of 906 NT6D70 SILC Line card 553 3001 211 Standard 3 00 August 2005...
Страница 388: ...Page 388 of 906 NT6D71 UILC Line card 553 3001 211 Standard 3 00 August 2005...
Страница 533: ...NT8D02 and NTDK16 Digital Line cards Page 533 of 906 Circuit Card Description and Installation Figure 106 NTDK16 DLC...
Страница 544: ...Page 544 of 906 NT8D02 and NTDK16 Digital Line cards 553 3001 211 Standard 3 00 August 2005...
Страница 546: ...Page 546 of 906 NT8D03 Analog Line card 553 3001 211 Standard 3 00 August 2005...
Страница 564: ...Page 564 of 906 NT8D09 Analog Message Waiting Line card 553 3001 211 Standard 3 00 August 2005...
Страница 626: ...Page 626 of 906 NT8D14 Universal Trunk card 553 3001 211 Standard 3 00 August 2005...
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Страница 720: ...Page 720 of 906 NTAK09 1 5 Mb DTI PRI card 553 3001 211 Standard 3 00 August 2005...
Страница 734: ...Page 734 of 906 NTAK10 2 0 Mb DTI card 553 3001 211 Standard 3 00 August 2005...
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Страница 762: ...Page 762 of 906 NTAK79 2 0 Mb PRI card 553 3001 211 Standard 3 00 August 2005...
Страница 768: ...Page 768 of 906 NTAK93 D channel Handler Interface daughterboard 553 3001 211 Standard 3 00 August 2005...
Страница 772: ...Page 772 of 906 NTBK22 MISP card 553 3001 211 Standard 3 00 August 2005...
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Страница 906: ...Page 906 of 906 Appendix A LAPB Data Link Control protocol 553 3001 211 Standard 3 00 August 2005...
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