NTI ENTERPRISE ENVIRONMENT MONITORING SYSTEM
18
Serial GSM Modem
To use a serial modem (ENVIROMUX-16D/-5D only), connection of the modem to the ENVIROMUX requires a CAT5 patch cable
and RJ45-to-DB9 male adapter (supplied). The modem connects to the “RS232 AUX” port. The firmware in the ENVIROMUX
must be version 1.3 or later.
Operation and use of the modem will be the same as that of the USB GSM modem. Once installed, the ENVIROMUX will sense
the modem and provide status information on the “Enterprise Setup” page (page 58).
Up to 1000 feet of CAT5E (350Mhz) cable may be used at a baud rate of 115,200bps.
Serial Modems Tested Include:
• Sierra Wireless Airlink MP895
• Four-Faith F1103 (NTI# ENVIROMUX-GSM-IND)
• MultiTech MTCBA-G-F2
• Enfora GSM1308
• Teltonika ModemCOM/G10
CT6488 Adapter
DB9 Male to RJ45 Pin Assignments
RJ45 Signal DB9M Signal
1 RTS Connected to 8 CTS
2 DTS Connected to 6 DSR
3 TxD Connected to 2 RxD
4 GND Connected to 5 GND
5 GND Connected to 1 DCD
6 RxD Connected to 3 TxD
7 DSR Connected to 4 DTR
8 CTS Connected to 7 RTS
The “AUX PWR” terminals of
the ENVIROMUX-16D may
be used to power the modem
provided the modem does
not require more than 150mA
to operate.
The AUX PWR terminals on
the ENVIROMUX-5D will
supply up to 500mA.
The “RS232 AUX” port
can also be used to
control a remote RS232
device. See page 22
for more on this feature.
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