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MicroSIP setup: add a ZuteSIP SIP account on Windows

Updated 2026-09-30 · By the ZuteSIP team (ZuteSIP Inc.)

Short answer: To set up MicroSIP, open the menu, add a new account, and enter sip.zutesipdialer.com as the SIP server and domain, followed by your ZuteSIP SIP username and password. Save, wait for the status to show online, and you can call from your real number on any Windows PC.

MicroSIP is a small, open-source softphone for Windows 7 and later, released under the GNU GPL v2. It suits people who want a single phone line on a desktop without a heavy client.

What you need

  • An active ZuteSIP number and its SIP username and password from the number's page.
  • A Windows PC with MicroSIP installed (the vendor says Linux and macOS users can run it through Wine; there is no mobile version).
  • A headset or microphone and speakers.

MicroSIP account settings

MicroSIP's account form uses separate fields for SIP server, SIP proxy, username, domain and login. Fill them as shown; leave the proxy blank.

SettingValue
SIP server / domain / registrarsip.zutesipdialer.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: add the account

  1. Open MicroSIP and click the small menu arrow in the top corner of the window.
  2. Choose the option to add an account.
  3. Enter sip.zutesipdialer.com as the SIP server and as the domain.
  4. Enter <SIP_USERNAME> as the username and, if a separate login field is shown, the same value there.
  5. Enter <SIP_PASSWORD> as the password and give the account a display name.
  6. Set transport to UDP (or TCP/TLS on port 5061 for TLS) and save.
  7. Open the program settings and check that PCMU and PCMA are among the enabled codecs.
  8. Watch the status line: it should say online once registration succeeds.

Tips for everyday use on Windows

MicroSIP is at its best as an always-on desktop line. Pin it to the taskbar, enable auto-start, and choose your headset explicitly in the audio settings so Windows doesn't switch to laptop speakers when a Bluetooth device disconnects.

Because the program is tiny, it is also a sensible choice for older PCs or virtual desktops where heavier softphones feel sluggish. It supports several accounts, and each one maps to one ZuteSIP number with its own SIP username and password.

If you manage many machines, note that the account details live in MicroSIP's local settings file. Treat that file like a password store: don't copy it to shared drives, and change the SIP password from the dashboard if a PC is lost. The dashboard's audit log of sign-ins and two-factor authentication protect the account that holds those credentials.

Receiving calls

While MicroSIP is running and registered, inbound calls to your number pop up with an answer button. Keep it running in the system tray and set it to start with Windows if the PC is your main phone. When the PC is off, forward calls to a mobile from the dashboard so nothing is missed.

Outbound caller ID

The caller ID on outgoing calls is the ZuteSIP number tied to the credentials in the active account. MicroSIP can hold more than one account, so if you own several numbers, switch accounts from the menu before dialing. Enter destinations with the full country code.

Troubleshooting MicroSIP

  • Status stays on 'Unauthorized' (401) or 'Forbidden' (403): the password or username is wrong. Paste them again without spaces.
  • You hear the other side but they can't hear you: allow MicroSIP through Windows Firewall, and turn on STUN or try TCP transport to get past NAT.
  • Silent calls: disable codecs other than PCMU and PCMA to rule out a codec mismatch.
  • IVR menus ignore keypresses: change the DTMF method to RFC 2833, or SIP INFO if RFC 2833 isn't recognised.

Testing your MicroSIP line

  1. Call a mobile you own and confirm both sides hear each other clearly.
  2. Call your ZuteSIP number from that mobile and check MicroSIP rings and shows the caller.
  3. Dial an automated menu and press a few keys to confirm DTMF works.
  4. Leave MicroSIP idle for an hour, then repeat the inbound test to confirm the registration stays alive.

Frequently asked questions

Is MicroSIP free?

Yes. It is free, open-source software under the GNU GPL v2, according to its official site.

Does MicroSIP work on Mac or phones?

It is built for Windows. The vendor mentions running it on Linux or macOS through Wine, and it has no Android or iPhone version.

Why is MicroSIP stuck on 'Connecting'?

Usually the server name is misspelled or the port is blocked. Check sip.zutesipdialer.com and try TCP if UDP is filtered.

Can I add more than one ZuteSIP number to MicroSIP?

Yes, add a separate account for each number with that number's own SIP credentials.

Can I use a USB headset with MicroSIP?

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

Related pages

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