Device Interface Serial Ports - Mitel Connected Guests InnLine IP Installation Manual

Device interface serial ports

InnLine IP comes standard with six physical RS-232 serial communication ports:
•
COM1 is a DB-9M connector that is part of the systems mother board, and may
be used for miscellaneous serial interfaces.
•
COM2 is a DB-9M connector that is part of the systems mother board, and may
be used for miscellaneous serial interfaces.
The following table shows the standard RS-232C serial interface port signals and
connector pin-outs for the InnLine IP system.
Signal
DCD
RXD*
TXD*
DTR
GND*
DSR
RTS
CTS
RI
* These three signals are of primary interest to the system.
When interfacing the InnLine IP system with external devices, the only required
signals are TXD, RXD and GND.
The external device, however, may require that other pins be connected.
These systems may use what is called "hardware handshaking." Contact the device
manufacturer for more information if you need help with handshaking.
It is often helpful to use a RS232 MINI-TESTER to check whether an interface cable is
properly wired.
A properly wired cable will show a low voltage (typically a red light) for both TXD
and RXD when no data is being transmitted, and a flickering high voltage (typically
a flickering green light) for either TXD or RXD when data is being transmitted. If
there is no voltage (no light) for either TXD or RXD, first check that the signal
ground (GND) is connected through both connectors properly. If either TXD or RXD
is low, but the other has no voltage, you may need to reverse the wiring for TXD and
RXD on a connector, because there is a conflict.
If problems persist, be careful to check connectors for loose pins and sockets.
Soldering connections may increase their durability. If a problem remains after
troubleshooting, contact Connected Guests for.
Most Device interfaces are preloaded before your system is shipped. To adjust
communication settings, such as baud rate, parity, data bits, or stop bits, click the Do
button in the InnLine IP main screen and then select Configure System. In the next
INNLINE IP Installation guide
Name
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
13
DB-9 DTE DB-25 DTE
1 8
2 3
3 2
4 20
5 7
6 6
7 4
8 5
9 22
Chapter 1: Installation