Specifications

60
DB-25 Male Modem to RJ45 Pin Assignment
RJ45 Signal DB-25M Signal
1 CTS Connected to 5 CTS
2 DSR Connected to 6 DSR
3 RxD Connected to 3 RxD
4 GND Connected to 7 GND
5 DCD Connected to 8 DCD
6 TxD Connected to 2 TxD
7 DTR Connected to 20 DTR
8 RTS Connected to 4 RTS
Ethernet Pinouts
The SERIMUX uses a standard Ethernet connector, that is a shielded and compliant with AT&T 258 specifications.
Pin Description
1Tx+
2Tx-
3Rx+
4NC
5NC
6Rx-
7NC
8NC
Certifications
Safety
• US: UL1950
• Canada: CSA 22.2 No. 60950
• Europe: EN60950 (CB Scheme Report)
Working Inside the SERIMUX
NOTICE: Do not attempt to service the SERIMUX except when following the instructions from NTI Technical Support
personnel. In such a case, first perform the following actions:
• Turn OFF the SERIMUX.
• Ground yourself by touching an unpainted metal surface at the back of the equipment before touching
anything inside the equipment.
Replacing the Battery
A coin-cell battery maintains date and time information. If it is necessary to repeatedly reset time and date information after turning
on the SERIMUX, replace the battery.
CAUTION: A new battery can explode if it is incorrectly installed. Replace the 3 Volt CR2032 battery only with the same
or equivalent type recommended by the battery manufacturer. Discard used batteries according to the battery
manufacturer’s instructions.
Certifications