COM Ports do not match phone port numbers on ISI9234PCIE card.

There have been issues noticed on certain installations where the COM port numbers and/or modem numbers do not match up with the phone line port number.

This resolution may not pertain to all customers and could vary based on how the customer is using the ISI card. For example, using this card in an outgoing only environment or using as an incoming device but with the software set up as a hunt group, may not require this resolution.

The ISI9234PCIE/4 has 4 physical modems on the ISI card that are wired to phone port 1, 2, 3 and 4. This applies to the ISI9234PCIE/8 and ISI5634UPCI/4 and 8 cards also.

Normally, on installation of the ISI9234PCIE/4, the 4 physical modems should install as 4 COM ports and 4 modems and connect to 4 phone jacks. Say COM3, COM4, COM5 and COM6 are installed as MT9234SMI, MT9234SMI #2, MT9234SMI #3 and MT9234SMI #4 and use phone port 1, 2, 3 and 4 respectively. Customer COM port numbers could vary based on other products already installed.

Sometimes during install, Windows sees 4 modems being installed but does not install them in the physical modem order that they have on the ISI card. For example, the install could be 4 COM ports and 4 modems but they could have installed in physical modem order where physical modem #1 went to COM3, but physical modem #2 was assigned to COM5, physical modem #3 was assigned to COM6 and finally physical modem #4 assigned to COM4. Now to call into COM6 you need to call phone port 3.

Method to test phone port layout:
1. Close any software or application using the modems.
2. Open a terminal program, such as HyperTerm, TeraTerm or other, at 115200 8N1 with hardware flow control for every COM port. This should give you 4 or 8 open terminal programs.
3. Issue AT&F then hit enter, even if you can not see the command.
4. Issue ATI3 then hit enter, should return a string with MT5634SMI-V92 or MT9234SMI version based on ISI model.
5. Issue ATS0=0 then hit enter.
6. Now call the phone number connected to phone port 1, did COM3 (in our example) display RING?
- If so, then phone port 1 (connected to physical modem #1) is installed as COM3 and MT9234SMI.
- If not, then phone port 1 (connected to physical modem #1) is installed as whatever COMx or MT9234SMI #x port where the RING displayed on the terminal.
7. Continue for all ports.
8. See note below for two options.
9. When testing is complete, close all terminal programs and restart software.

First option, is to write the port assignment differences and continue using software keeping in mind the phone number differences.

Second option, involves figuring out which ports need to be re-assigned then going into Device Manager. This is only a suggestion for those who have the ability and confidence to modify the Device Manager.

* Here is our previous example layout:
The product installed where physical modem #1 went to COM3, but physical modem #2 was assigned to COM5, physical modem #3 was assigned to COM6 and finally physical modem #4 assigned to COM4.

To modify our set up example.
- Go into Device Manager and uninstall MT9234SMI #3 and COM5 (from our example/testing this is physical modem #2) which should ideally be MT9234SMI #2 and COM4. Make sure to uninstall the MT9234SMI #x before the COMx port.
- While in device manager, uninstall MT9234SMI #2 and COM4 because this is where we want physical modem #2 to go.
- Scan for new hardware changes.
- Did they re-install properly?
- If not, repeat procedure.
- If so, continue procedure until all modems are assigned to your liking.

If you have additional questions or issues please make a portal case at our MultiTech Support Portal, support.multitech.com .