Uick, Tart, Uide – CTI Products NCB/EM with External PSTN Modem User Manual
Page 7
CTI Products, Inc.
NCB-EM User Guide
Quick-Start Guide
1
Q
UICK
-S
TART
G
UIDE
This Quick Start Guide provides a concise series of steps to get a pair of the NCB modules “up and running” quickly so that
initial operation may be confirmed.
It is important that all L
ON
W
ORKS
devices attached to the “NETWORK” connector of any one NCB module use the same
network transceiver . See “L
In the following steps, identify the two units as “NCB Unit 1” and “NCB Unit 2”.
Switch Settings
Set the switches on the NCB units as follows:
BAUD 1 : 7
BAUD 2 : 0
MODE 1 : C
MODE 2 : C
OPTION B Switches 1 through 4 : UP
OPTION A Switches 1 through 4 and 6 through 8 : UP
OPTION A Switch 5 : DOWN
If you are using the leased-line modems (MT2834BL), set the DIP switches on the side of those modems as
follows:
1: DOWN
5: #
9: DOWN
13: UP
2: UP
6: UP
10: UP
14: UP
3: UP
7: DOWN
11: DOWN
15: UP
4: UP
8: DOWN
12: DOWN
16: UP
# Set Switch 5 DOWN on Modem 1 and UP on Modem 2
Module Connection
Connect LonWorks network devices to the “NETWORK” connectors of each NCB unit (both RJ45s and the
terminal strip are in parallel). If using the RJ45 connector(s), connect to pins 1 & 2 (the right-most two pins) and
use caution, as other pins on these connectors carry DC power. On a three pin terminal strip connector (if
present), use the two left-most pins.
Connect the DB25 connector on the modem to the “PORT 1” connector on the rear of the NCB unit using the
cable supplied with the modem.
If using the dial-up modems (MT2834ZDX), connect each modem to a standard analog telephone line or PBX
port. If using the leased-line modems (MT2834BL), connect the “LEASED” or “PRIVATE” connectors on the
rear of each modem together using the telephone cord provided with the NCB unit.
Connect power to the modems (and switch them on), and to the NCB units via the front panel “DC IN” connector.
The units can be powered-up in any sequence. Both NCB Unit “ERR” LEDs will begin to flash.
NOTE: It is normal for the NCB Unit “ERR” LED to flash quickly for up to 30 seconds after power-up
or reset of a fully configured and connected NCB/EM. This indicates that any external modems
configured for use are in process of initializing. A problem is indicated only if the “ERR” LED locks on
or continues to flash for more than 30 seconds after power-up or reset.
If dial-up modems (MT2834ZDX) are being used, the NCB modules are ready for use once the “ERR” LEDs have
stopped flashing and can be given a dialing command. Proceed directly to “S
”.
If leased-line modems (MT2834BL) are being used, the initialization sequence for each is complete once the
“ERR” LED on the respective NCB unit has stopped flashing (this initialization sequence sets non-volatile
parameters in the modem and must be performed whenever a new modem is installed for use with an NCB unit).
Switch both modems and both NCBs into operational mode as follows:
MODEM DIP Switch 10: change to DOWN
NCB MODE 1, 2 : change to D
Power-cycle the modems and NCB units. The “ERR” LEDs will blink briefly, then stay off and the modems will
automatically begin the training sequence. Within 30 seconds, the “CD” LEDs on both modems will light
indicating a successful connection. The modules are now ready for use. Any LonTalk packets entering one NCB
unit will exit the other and vice-versa. Breaking then restoring the leased-line connection between the modems
will cause the connection to be automatically re-established.
NOTE: If using Leased-Line mode, this quickstart setup includes connecting the modems “back-to-
back” using 2 wire mode and a reduced transmit level. In an actual leased-line installation involving
longer telephone cable lengths, change MODEM DIP Switch 3 to DOWN to configure the modem to
output full transmit power, and set MODEM DIP Switch 16 UP for 2-wire mode or DOWN for 4-wire
mode.