Page 436 of 906 NT7D16 Data Access card
553-3001-211 Standard 3.00 August 2005
The fourth mode, gateway, is a subset of the modem mode and is not normally used. This mode is useful if the attached modems do not have Ring Indicator lead. The application used is inbound modem pooling.The different modes enable the DAC to connect to different types of devices such as modems (modes 0, 1, 2, and 3), gateways (modes 4, 5. 6, and 7), hosts (modes 8. 9. 10, and 11), and terminals (modes 12. 13. 14, and 15). After selecting the appropriate group (that is, modem, gateway, host, or terminal), the installer should study the four different modes in that group to make the proper selection. See Table 157.
Table 157
DAC mode of operation selection (Part1 of 5)
Service changeable downloadable parameters (LD 11)
Operation
mode
Modem/
Gateway/
Host/KBD
Forced
DTR* Hotline
Type of device
to be connected Group selection
DEM PRM DTR HOT
0 (DTE) OFF
“Host On”
(Ring
Indicator
— RI)
OFF
Not
Forced
OFF
Not
Hotline
Modem Pool
inbound and
outbound (similar
to Synchronous /
Asynchronous
Data Module
(SADM) in
inbound) MSB by
RI
Modes 0, 1, 2,
and 3 are for
RS232 modem
connectivity
1 (DTE) OFF
“Host On”
(RI)
OFF
Not
Forced
ON
Hotline
Modem Pool
inbound only
(Hotline by RI-
similar to SADM)
* Not prompted for Type = R422. Defaults for Type = R422: DEM = DCE and DTR = OFF.