Nortel Networks Circuit Card - Manual (Page 436)

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 (Part 1 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.