SIP Trunk Setup for Voyced – Yeastar IP PBX

Connect your Yeastar telephone system to Voyced to make and receive calls using your business telephone number.

This guide covers the Yeastar P-Series Appliance, Software and Cloud editions. It also includes the relevant menu differences for older Yeastar S-Series systems.

What You'll Need

Before starting, make sure you have:

• Administrator access to your Yeastar PBX.

• At least one working telephone extension.

• An active Voyced telephone number.

• Your Voyced SIP username and Service Password.

• A working internet connection.

Voyced SIP details

Replace the example credentials with your own Voyced details.

You can find your DID under Cloud PBX / IP Centrex > Phone Lines in your Voyced Hosted IPPBX. Select the wrench icon beside your number.

Your Service Password is available under My Profile > Settings.

The Service Password is different from your Voyced website login password.

Requirements Before You Begin

1. Confirm your Yeastar PBX has internet access.

2. Make sure it can connect to sip.voyced.eu using UDP port 5060.

3. Check that your firewall permits the RTP audio traffic required by your PBX.

4. If your PBX is behind a router, check its public IP and NAT settings.

5. Confirm at least one extension is registered and can make internal calls.

Check your network settings

For the P-Series Appliance and Software editions, review:

System > Network > Public IP and Ports

Where your PBX is behind NAT, check that:

• The public IP address or external hostname is correct.

• Local Network Identification includes your internal network ranges.

• The configured SIP and RTP ports match your network.

• Any required firewall rules are correctly configured.

The P-Series commonly uses UDP ports 10000–12000 for RTP, but your actual configuration may differ.

On older S-Series systems, review the SIP NAT settings under:

Settings > PBX > General > SIP > NAT

For a managed P-Series Cloud edition, the network settings may be controlled by your service administrator.

Choose the correct SIP trunk type

Yeastar supports several trunk types.

For Voyced, select:

Register Trunk

This allows your PBX to register with Voyced using your SIP username and Service Password.

Do not choose Peer Trunk or Account Trunk for this standard configuration.

SIP Trunk Setup

Step 1: Log in to your Yeastar PBX

1. Open your Yeastar administrator interface.

2. Log in using your administrator credentials.

On current P-Series systems, open:

Extension and Trunk > Trunk

On older S-Series systems, open:

Settings > PBX > Trunks

Step 2: Create the Voyced SIP trunk

1. Click Add.

2. Under Basic, enter Voyced as the trunk name.

3. Set Trunk Status to Enabled.

4. Under Select ITSP Template, choose General.

If your Yeastar installation offers a specific Voyced provider template, you may use it instead, provided its server settings match your Voyced account.

For a manual connection, continue with General.

Under Detailed Configuration, enter:

Your Username and Authentication Name should normally be identical.

The password must be your Voyced Service Password.

If your Yeastar version includes a From User field, enter your Voyced DID.

Leave other settings at their defaults for the initial connection.

Step 3: Configure audio codecs

Open the trunk's Codec settings.

Set the preferred order to:

1. PCMA (G.711 A-law).

2. PCMU (G.711 u-law).

These codecs provide broad compatibility with Voyced.

G.729 may also be used where supported by your PBX and the complete calling route.

For initial testing, PCMA and PCMU are recommended.

Step 4: Configure DID numbers

A DID is the telephone number people dial to reach your business.

For a P-Series system:

1. Open the Voyced trunk configuration.

2. Select DIDs/DDIs.

3. Click Add if you need to specify a DID.

4. Enter the telephone number assigned by Voyced.

5. Save the entry.

If your DID differs from your SIP authentication username, add the DID to the trunk. Yeastar uses this information to recognise incoming calls.

If several numbers are delivered through the same Voyced account, add the relevant DIDs.

On an S-Series system, DID Numbers are available under the trunk's Advanced settings.

Use the DID format provided by Voyced. The number used for inbound routing must match the DID received by your PBX.

Step 5: Save and check registration

1. Click Save and Apply.

2. Return to the trunk overview.

On the P-Series, open:

Extension and Trunk > Trunk

Find your Voyced trunk.

Its status should indicate:

Registered

On the S-Series, you can also check the trunk under PBX Monitor.

If the trunk does not register, check the credentials, server address and network settings before continuing.

Step 6: Create an inbound route

An inbound route determines where incoming Voyced calls are sent.

You can route calls to:

• An extension.

• A ring group.

• An IVR telephone menu.

• A call queue.

• Another supported PBX destination.

On the P-Series, open:

Call Control > Inbound Route

On the S-Series, open:

Settings > PBX > Call Control > Inbound Routes

Click Add.

Enter:

Move the Voyced trunk into the selected trunk list.

For a single-number trunk, you may leave DID Pattern empty to match incoming calls on that trunk regardless of the received DID.

If several telephone numbers need different destinations, use specific DID patterns for each route.

Select the destination and click Save and Apply.

Step 7: Create an outbound route

An outbound route determines which trunk your extensions use when making calls.

On the P-Series, open:

Call Control > Outbound Route

On the S-Series, open:

Settings > PBX > Call Control > Outbound Routes

Click Add.

Under General, enter:

Under Dial Pattern, click Add.

For international calls, enter:

This matches international telephone numbers beginning with 00.

Setting Strip to 0 ensures the PBX does not remove any digits.

Leave Prepend empty so Yeastar sends the number unchanged.

Step 8: Select the Voyced trunk and extensions

Within the outbound route:

1. Find the Trunk section.

2. Move Voyced from Available to Selected.

3. Find the Extension/Extension Group section.

4. Select the extensions or groups permitted to make calls through Voyced.

5. Save and Apply.

If your PBX already contains other outbound routes, check their priority.

A broad existing route such as X. may match calls before your new Voyced route.

Place the more specific route in the correct order.

National and local calls

To allow national or local calling, add dial patterns appropriate to your numbering plan.

For example, the broad pattern:

X.

matches many telephone numbers.

Use this only if you want a general outbound route.

For more control, create separate patterns for national, mobile and international calls.

Keep emergency call routing configured according to your location and telephone service.

Step 9: Configure voicemail access

Your Voyced voicemail access number is:

1233

If you want Yeastar extensions to access Voyced voicemail:

1. Open Call Control > Outbound Route.

2. Edit your Voyced route or create a separate voicemail route.

3. Add a dial pattern for 1233.

4. Set Strip to 0.

5. Leave Prepend empty.

6. Select the Voyced trunk.

7. Allow the relevant extensions to use the route.

8. Save and Apply.

Check that 1233 does not conflict with an existing Yeastar feature code.

Yeastar also provides its own voicemail system. You can continue using that if you prefer to keep voicemail within your PBX.

Step 10: Configure Caller ID

Caller ID is the telephone number displayed to the person receiving your call.

By default, Voyced uses the authorised number assigned to your SIP account.

Yeastar allows Caller ID configuration at trunk, extension and outbound route level.

For a standard setup, leave the outbound route's Caller ID override empty unless you have a specific authorised number to display.

If you want another Caller ID:

1. Log in to your Voyced client area.

2. Open a sales support ticket.

3. Use the subject Outbound Caller ID adjustment.

4. Provide the Voyced DID you are calling from.

5. Provide the number you want displayed.

Numbers outside your Voyced account require proof of ownership and additional verification.

Voyced Internal DIDs and extension numbers must not be used as public Caller ID numbers.

Test Your Connection

Once your Voyced trunk shows Registered, complete the following tests.

Test 1: Outgoing calls

1. Use an extension connected to your Yeastar PBX.

2. Dial an external telephone number permitted by your outbound route.

3. Confirm the call connects.

4. Check that audio works in both directions.

5. Verify the Caller ID shown to the recipient.

Test 2: Incoming calls

1. Call your Voyced telephone number from another telephone.

2. Confirm Yeastar receives the call.

3. Check that the inbound route sends it to the correct destination.

4. Answer the call and test audio in both directions.

Test 3: International calls

Voyced requires all international calls to use:

00 + Country Code + Telephone Number

For example:

00442035000202

Check that Yeastar passes the complete number to Voyced.

The outbound route must not strip the leading 00.

Test 4: Voicemail

Dial:

1233

Confirm that the call reaches your Voyced voicemail service.

If you use Yeastar's own voicemail system instead, test that separately.

Test 5: Simultaneous calls

If your Voyced service supports multiple simultaneous calls, test the expected call capacity.

The available number of external calls depends on your Voyced service.

A higher trunk call limit on your Yeastar PBX does not increase your Voyced call capacity.

Troubleshooting

The SIP trunk does not register

Check the following:

Confirm that the trunk is enabled.

After correcting the settings, click Save and Apply.

Do not use your Voyced website login password.

Incoming calls do not work

• Confirm the trunk is registered.

• Check the inbound route and its selected destination.

• Make sure the route includes the Voyced trunk.

• Check the DID Pattern against the DID received by Yeastar.

• If the DID differs from the SIP authentication username, add it under the trunk's DIDs/DDIs settings.

• Check your network and firewall configuration.

If your PBX receives a call but cannot find a matching route, review the actual DID provided with that call.

For a single-number trunk, test with DID Pattern empty.

Outgoing calls do not work

• Confirm the Voyced trunk is registered.

• Check the outbound route.

• Verify that the extension is permitted to use the route.

• Confirm the route selects the Voyced trunk.

• Review the route priority.

• Check your available Voyced call credit.

• Confirm the destination is permitted.

International calls fail

Check that:

• The number begins with 00.

• The outbound pattern is 00X..

• Strip is set to 0.

• Prepend is empty.

• The extension is permitted to use the route.

• Another outbound route is not taking priority.

For example, 00442035000202 must reach Voyced unchanged.

No audio or one-way audio

For a P-Series Appliance or Software installation, check:

System > Network > Public IP and Ports

Confirm your public address, local network and SIP NAT settings are correct.

Also check:

• The RTP ports configured on your PBX.

• The corresponding firewall rules.

• The microphone and speakers on your extension devices.

• The selected audio codecs.

Start with PCMA and PCMU.

If your router has SIP ALG enabled and this causes SIP problems, disable it.

Voicemail does not work

Dial 1233 directly from an extension.

If it fails:

• Confirm the Voyced trunk is registered.

• Check the outbound route for 1233.

• Ensure the PBX is not treating the number as a local feature code.

• Check that the extension is allowed to use the route.

Incorrect Caller ID

Check Caller ID settings on the extension, outbound route and trunk.

Only use telephone numbers authorised on your Voyced account.

If another number is required, contact Voyced Support.

Check registration and call logs

On P-Series systems, check registration under:

Extension and Trunk > Trunk

On S-Series systems, use PBX Monitor.

For failed calls, review the call records and available SIP diagnostics in your Yeastar administrator interface.

Record the following details:

• Date and time of the call.

• Calling number.

• Destination number.

• Whether the call was incoming or outgoing.

• Any SIP error or failure message.

Provide the relevant information to Voyced Support if you need assistance.

Do not share your Service Password.

Final Tips

• Use sip.voyced.eu as your primary SIP server.

• Select Register Trunk for the standard Voyced connection.

• Use your Voyced DID as Username and Authentication Name.

• Use UDP port 5060.

• Start with PCMA and PCMU audio codecs.

• Add the correct DID numbers when they differ from your SIP authentication username.

• Configure inbound and outbound routes separately.

• Make sure the intended extensions can use your outbound route.

• Keep the leading 00 on international calls.

• Use only authorised outbound Caller ID numbers.

• Check the configured RTP ports and NAT settings if calls have audio problems.

• Confirm your trunk call limits match your Voyced service.

• Test incoming and outgoing calls after changing your SIP or routing settings.

Once registration, call routing and audio have been tested successfully, your Yeastar telephone system is ready to use with Voyced.

Last updated: 27/10/2026

© Voyced
All information provided is copyrighted and purely informative in nature. It is maintained by Voyced with the greatest of care using reliable sources only.
Given the fast evolution of the telecom sector, Voyced does not offer any guarantee about the accuracy and completeness of the information offered. 
We explicitly do not give anyone permission to use this information in any other way than to inform themselves about what (legal) requirements there may be and they need to comply with when registering Services and/or DIDs with Voyced.