# Can Asterisk be run with no FXS/FXO cards?

**URL:** <https://community.asterisk.org/t/can-asterisk-be-run-with-no-fxs-fxo-cards/14361>\
**Category:** Asterisk Support\
**Created:** [May 11, 2007, 5:50pm UTC](https://community.asterisk.org/t/can-asterisk-be-run-with-no-fxs-fxo-cards/14361 "2007-05-11T17:50:52Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Cards1007](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@Cards1007](https://community.asterisk.org/u/Cards1007)\
**Post date:** [May 11, 2007, 5:50pm UTC](https://community.asterisk.org/t/can-asterisk-be-run-with-no-fxs-fxo-cards/14361/1 "2007-05-11T17:50:52Z")

</div>

Sorry if this is a dumb question, but can Asterisk be run with no FXS/FXO cards?

In other words, if I used all IP phones and used a VoIP provider for service, would there be any need to install these cards?

I’m trying to figure out what costs would be involved and whether Asterisk is a good option for my office phone system. (We currently have 3 POTS lines, an older PBX with 13 extensions. Looking to support upwards of 25 phones immediately with the potential to expand to double that.)

---

<div class="post-metadata">

**Author:** ![angler](https://avatars.discourse-cdn.com/v4/letter/a/96bed5/32.png) [@angler](https://community.asterisk.org/u/angler)\
**Post date:** [May 11, 2007, 6:13pm UTC](https://community.asterisk.org/t/can-asterisk-be-run-with-no-fxs-fxo-cards/14361/2 "2007-05-11T18:13:45Z")

</div>

Yes you can use Asterisk for all voip without any hardware.