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MicroSIP setup: adding a SMS Conecta SIP account on Windows

Updated 2026-09-30 · By the SMS Conecta team (SMSConecta Inc.)

Short answer: Setting up MicroSIP involves opening the menu, adding a new account, and typing sip.smsconecta.com as both the SIP server and domain, then your SMS Conecta SIP username and password. Save it, wait until the status reads online, and your real number is ready to call from any Windows PC.

MicroSIP is a compact, open-source softphone built for Windows 7 and newer, distributed under the GNU GPL v2. It fits people after a single desktop phone line without wanting a heavyweight client.

What you need first

  • An active SMS Conecta number along with its SIP username and password, found on that number's page.
  • A Windows machine with MicroSIP installed (the vendor notes that Linux and macOS users can run it through Wine; no mobile version exists).
  • A headset, or a separate microphone and speakers.

MicroSIP account settings

The MicroSIP account form splits fields for SIP server, SIP proxy, username, domain and login. Fill each one as shown below and leave the proxy field empty.

SettingValue
SIP server / domain / registrarsip.smsconecta.com
Username / auth ID<SIP_USERNAME> (from the number's page in the dashboard)
Password<SIP_PASSWORD> (from the same page)
Transport and portUDP 5060 by default; TCP 5060 or TLS 5061 if needed
CodecsG.711 µ-law (PCMU) and A-law (PCMA)
AuthenticationSIP digest, per-number username + password
DTMFRFC 2833 (RTP events) or SIP INFO
Outbound proxyLeave empty

Step-by-step: adding the account

  1. Launch MicroSIP and click the small arrow menu at the top corner of its window.
  2. Select the option for adding an account.
  3. Type sip.smsconecta.com into both the SIP server and domain fields.
  4. Type <SIP_USERNAME> as the username, and repeat it in a separate login field if one appears.
  5. Type <SIP_PASSWORD> as the password, then give the account a name you will recognize.
  6. Choose UDP as the transport (or TCP/TLS on port 5061 for TLS), then save.
  7. Open the program settings and verify PCMU and PCMA sit among the enabled codecs.
  8. Keep an eye on the status line; it switches to online once registration goes through.

Tips for daily use on Windows

MicroSIP works best as an always-on desktop line. Pin it to the taskbar, switch on auto-start, and pick your headset explicitly in the audio settings so Windows doesn't jump to laptop speakers the moment a Bluetooth device disconnects.

Being so lightweight, it's also a smart pick for older machines or virtual desktops where bulkier softphones feel sluggish. It handles several accounts at once, with each one tied to one SMS Conecta number's own SIP username and password.

If you're managing many machines, remember that account details sit in MicroSIP's local settings file. Treat that file as you would a password vault: don't copy it onto shared drives, and swap the SIP password from the dashboard if a PC goes missing. The dashboard's sign-in audit log and two-factor authentication guard the account that holds those credentials.

Receiving calls

As long as MicroSIP stays open and registered, inbound calls to your number pop up with an answer button. Leave it running in the system tray and have it launch alongside Windows if the PC doubles as your main phone. When the PC is powered off, forward calls to a mobile from the dashboard so you don't miss anything.

Outbound caller ID

Outgoing calls show the SMS Conecta number linked to whichever credentials the active account uses. Since MicroSIP can hold more than one account, switch accounts from its menu before dialing if you own several numbers. Enter destination numbers with their full country code.

Troubleshooting MicroSIP

  • Status won't move past 'Unauthorized' (401) or 'Forbidden' (403): the password or username is incorrect. Paste both in again, free of spaces.
  • You can hear the other person but they can't hear you: allow MicroSIP through Windows Firewall, then enable STUN or try TCP transport to work around NAT.
  • Calls go silent: turn off codecs other than PCMU and PCMA to rule out a mismatch.
  • IVR menus don't react to keypresses: switch the DTMF method to RFC 2833, or to SIP INFO if RFC 2833 isn't recognized.

Testing your MicroSIP line

  1. Phone a mobile you own and make sure both sides hear each other without trouble.
  2. Dial your SMS Conecta number from that mobile and confirm MicroSIP rings and displays the caller.
  3. Call an automated menu and press a few digits to verify DTMF is working.
  4. Let MicroSIP sit idle for an hour, then rerun the inbound test to confirm the registration is still alive.

Frequently asked questions

Is there a cost to use MicroSIP?

No, it's free, open-source software released under the GNU GPL v2, per its official site.

Will MicroSIP run on a Mac or on phones?

It's built specifically for Windows. The vendor mentions it can run on Linux or macOS via Wine, but there is no Android or iPhone build.

Why does MicroSIP get stuck at 'Connecting'?

Usually the server name has a typo or the port is blocked. Double-check sip.smsconecta.com and try TCP if UDP is being filtered.

Is it possible to add more than one SMS Conecta number to MicroSIP?

Yes, create a separate account for each number using that number's own SIP credentials.

Does MicroSIP work with a USB headset?

Yes. Pick the headset as both the microphone and speaker in MicroSIP's settings so audio doesn't drift to other devices.

Related pages

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