# Get RealPort to use a lower com port number?

**URL:** <https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942>\
**Category:** Realport\
**Tags:** serial-interface, port, realport, sp\
**Created:** [June 16, 2016, 12:15pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942 "2016-06-16T12:15:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![daveyh](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@daveyh](https://forums.digi.com/u/daveyh)\
**Post date:** [June 16, 2016, 12:15pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/1 "2016-06-16T12:15:14Z")

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When I install RealPort for a Connect SP, the lowest port I can choose is COM18. The highest port our software supports is COM16. Is there a way to get RealPort to use a lower com port number? There’s only one com port in the computer, COM1. Win7/64bit Thanks!

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**Author:** ![userid0](https://avatars.discourse-cdn.com/v4/letter/u/f6c823/32.png) [@userid0](https://forums.digi.com/u/userid0)\
**Post date:** [June 16, 2016, 2:01pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/2 "2016-06-16T14:01:01Z")

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The following knowledge base article might prove useful for this:

[http://knowledge.digi.com/articles/Knowledge\_Base\_Article/HOW-TO-Remove-Unused-COM-Ports-for-Re-assignment-with-Windows-RealPort](http://knowledge.digi.com/articles/Knowledge_Base_Article/HOW-TO-Remove-Unused-COM-Ports-for-Re-assignment-with-Windows-RealPort)

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**Author:** ![daveyh](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@daveyh](https://forums.digi.com/u/daveyh)\
**Post date:** [June 16, 2016, 2:13pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/3 "2016-06-16T14:13:47Z")

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There are no conflicting COM ports to use. Only COM1 and COM 18 (realport) are shown and used.

I know how to change the COM port using Device Manager, but it doesn’t list any ports lower than COM18.

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**Author:** ![halovapor](https://avatars.discourse-cdn.com/v4/letter/h/54ee81/32.png) [@halovapor](https://forums.digi.com/u/halovapor)\
**Post date:** [June 16, 2016, 2:16pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/4 "2016-06-16T14:16:05Z")

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Try using the following KB:

[http://knowledge.digi.com/articles/Knowledge\_Base\_Article/I-have-phantom-serial-ports-in-Windows-How-can-I-remove-them](http://knowledge.digi.com/articles/Knowledge_Base_Article/I-have-phantom-serial-ports-in-Windows-How-can-I-remove-them)

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**Author:** ![daveyh](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@daveyh](https://forums.digi.com/u/daveyh)\
**Post date:** [June 16, 2016, 4:36pm UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/5 "2016-06-16T16:36:36Z")

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I don’t seem to be communicating very well. There are no phantom ports. The only com ports in device manager are COM1 and com18- the realport port.

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**Author:** ![daveyh](https://avatars.discourse-cdn.com/v4/letter/d/65b543/32.png) [@daveyh](https://forums.digi.com/u/daveyh)\
**Post date:** [June 20, 2016, 10:43am UTC](https://forums.digi.com/t/get-realport-to-use-a-lower-com-port-number/16942/6 "2016-06-20T10:43:01Z")

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I tried installing it on a second computer. Realport only gives the option to install on COM2 and then COM22 and above.