SIP Trunk Setup for Zoom Phone

Use Voyced as an external SIP provider

This guide explains how to connect your Voyced telephone number and SIP service to Zoom Phone.

Zoom Phone is a cloud telephone system that allows users to make and receive business calls through the Zoom Workplace application, mobile devices and compatible desk phones.

Zoom Phone supports external telephone providers through its Bring Your Own Carrier (BYOC) service.

Unlike a traditional telephone system, Zoom Phone cannot register directly with Voyced using a SIP username and password.

For a standard Voyced connection, use Zoom Phone Bring Your Own Carrier - Premises Peering (BYOC-P) with a suitable Session Border Controller (SBC).

The SBC connects Zoom Phone to Voyced and handles SIP registration, audio, security and telephone number formatting.

This manual covers:

• Zoom Phone BYOC-P

• Connecting an SBC to Zoom Phone

• SIP registration with Voyced

• Zoom Route Groups and SIP Groups

• Adding and assigning Voyced telephone numbers

• Incoming and outgoing call routing

• Caller ID and number formatting

• Testing and troubleshooting

What You'll Need

Before you begin, make sure you have:

• Administrator access to your Zoom organisation

• A Zoom Phone subscription that supports BYOC-P

• Permission to manage Zoom Phone and telephone numbers

• A supported Session Border Controller

• An SBC that supports SIP registration with external providers

• A public IP address for the SBC

• A trusted TLS certificate

• A working internet connection

• At least one Zoom Phone user

• An active Voyced telephone number

Your Voyced SIP details:

Replace the example username and password with your actual Voyced service details.

Requirements Before You Begin

Understand the Connection

Zoom Phone and Voyced use different SIP connection methods.

The SBC connects the two systems.

Zoom Phone
    |
    | BYOC-P
    | SIP over TLS
    | Secure RTP
    |
    v
Session Border Controller
    |
    | SIP Registration
    | Username / Password
    | UDP Port 5060
    | Standard RTP
    |
    v
sip.voyced.eu
    |
    v
Telephone Network

The SBC performs several functions:

• Registers with Voyced.

• Connects securely to Zoom Phone.

• Routes calls between the two systems.

• Converts telephone number formats.

• Handles the differences in SIP signalling.

• Connects secure and standard audio streams.

Supported Connection Methods

Zoom Phone offers different ways to connect external telephone providers.

Zoom also offers Provider Exchange for participating carriers.

A provider can only be connected through that service when it is available in Zoom's provider list and the provider supports that connection method.

The standard Voyced SIP account described here uses BYOC-P.

SBC Requirements

Your SBC must support:

Zoom maintains a list of supported and certified SBC products.

Common SBC families include AudioCodes, Ribbon and Oracle.

Confirm that your chosen model and software version support Zoom BYOC-P and registration-based SIP connections.

The SBC must also support SIP and media conversion between the two services.

SIP Trunk Setup Steps

1. Log in to Zoom Administration

Open:

https://zoom.us/signin

Log in using an account with the required administration permissions.

1. Open Admin Center.

2. Select Product configuration.

3. Open Numbers.

4. Select BYOC Configuration.

This section manages external carrier connections.

You should see configuration areas for:

• Session Border Controllers

• Route Groups

• SIP Groups

These three components form the connection between Zoom Phone and your external carrier.

If BYOC Configuration is not available, check that your Zoom account is enabled for BYOC-P and has the required subscription and permissions.

2. Prepare Your Session Border Controller

Before adding the SBC to Zoom, configure its network settings.

Your SBC needs a public IP address that Zoom can reach.

Example:

Use your real public IP address.

The SBC may be:

• Installed on your premises

• A virtual machine

• Hosted in a data centre

• Part of a managed SBC service

The location does not change the need for a supported connection to Zoom Phone and SIP registration with Voyced.

3. Configure the SBC TLS Certificate

Zoom requires a publicly trusted certificate for secure SIP signalling.

Configure the SBC with:

Example SBC hostname:

sbc.yourcompany.com

The certificate must identify the correct SBC hostname and include the required certificate chain.

Use a certificate authority accepted by Zoom.

Install the certificate using your SBC's administration interface.

The exact procedure depends on the SBC manufacturer.

After installation, confirm that the certificate is valid and the SBC can establish TLS connections.

4. Configure the Zoom-Facing SBC Connection

Open your SBC administration interface.

Create a SIP connection for Zoom Phone.

Example:

Zoom operates several data centres.

Your SBC must use the SIP signalling destinations provided for the Zoom region assigned to your account.

Do not copy an IP address from another Zoom region.

You can identify the relevant region and connectivity information in your Zoom BYOC configuration.

Configure the SBC using the Zoom interoperability instructions supplied by its manufacturer.

The Zoom-facing connection does not use your Voyced SIP username or password.

5. Configure the Voyced SIP Connection

On the same SBC, create a second SIP connection.

Enter:

The server hostname must be:

sip.voyced.eu

Use your actual Voyced telephone number as the SIP username.

Example:

442012345678

Enter your Voyced service password.

Use standard SIP registration with username/password authentication.

Do not configure the connection as IP-only authentication.

6. Enable SIP Registration

Open the registration settings for the Voyced connection.

Configure:

The SBC should send SIP REGISTER requests to Voyced.

A normal authentication sequence may look like:

REGISTER
401 Unauthorized
REGISTER with authentication
200 OK

The initial 401 Unauthorized is a normal SIP authentication challenge.

The final 200 OK confirms successful registration.

If the registrar requires a different expiry interval, use the accepted value.

The SBC must maintain registration while the service is active.

7. Configure Audio Codecs

Your SBC must support compatible audio on both connections.

For the Voyced side, use:

For Zoom Phone, the SBC may negotiate codecs supported by Zoom, including G.711.

Where possible, use G.711 on both connections.

Configure the SBC to handle the media security difference.

Use RFC2833 for telephone keypad signalling.

Zoom also requires incoming SIP INVITE messages from the SBC to contain an SDP media offer.

This is called Early Offer.

Configure the SBC's Zoom connection accordingly.

Save your media settings.

8. Configure Telephone Number Translation

Zoom Phone and Voyced use different international number formats.

Zoom Phone uses a leading +.

Voyced requires digits only.

Example:

The SBC must convert the number when sending calls towards Voyced.

Outgoing Translation

Configure a called-number translation rule:

Example:

Original:   +442012345678
Translated: 442012345678

If your SBC supports regular expressions, the matching pattern may be:

^\+([1-9][0-9]{7,14})$

Replacement:

$1

Use the replacement format supported by your SBC.

Do not remove the country code.

9. Configure Incoming Number Translation

Calls travelling from Voyced to Zoom require the opposite conversion.

For example:

Voyced: 442012345678
Zoom:   +442012345678

Configure:

Example:

Original:   442012345678
Translated: +442012345678

A suitable regular expression is:

^([1-9][0-9]{7,14})$

Replacement:

+$1

Zoom must receive the called number in the format assigned to the user or telephone service.

For BYOC-P, Zoom expects international numbers in E.164 format.

Check the SBC's incoming SIP Request-URI to confirm the correct number is sent.

10. Configure Outbound Caller ID

Your outgoing calls must present a telephone number authorised for your Voyced account.

Zoom normally identifies telephone numbers using a leading +.

Example:

+442012345678

Configure the SBC to present the authorised number in the format required by Voyced.

For example:

442012345678

Check the relevant SIP identity headers:

• From

• P-Asserted-Identity

These may be used by the SBC and provider to identify the calling number.

For the first connection test, use your registered Voyced number as the outgoing caller ID.

If you have additional authorised telephone numbers, configure the appropriate presentation rules for those numbers.

11. Configure SBC Call Routing

The SBC needs two main call routes.

Outgoing Calls

Incoming Calls

For incoming calls, the SBC must recognise the SIP connection associated with the registered Voyced account.

It must preserve the actual called telephone number so Zoom can identify the destination.

Save both call routes.

12. Add the SBC to Zoom Phone

Return to Zoom Administration.

Navigate to:

Admin Center → Product configuration → Numbers → BYOC Configuration

Next:

1. Find Session Border Controllers.

2. Click Manage.

3. Click Add.

Enter:

Zoom uses TLS for this connection.

The protocol setting cannot be changed to UDP.

Additional SBC Settings

Review the available options.

For a normal telephone provider connection, use BYOC-P.

You do not need to enable the separate BYOP-P function unless you are also connecting a private PBX and its extension numbering plan.

Click Save.

The SBC should appear in the list.

13. Create a BYOC Route Group

Zoom uses Route Groups to connect its telephone infrastructure to your SBC.

Navigate to:

Admin Center → Product configuration → Numbers → BYOC Configuration

Find Route Groups.

1. Click Manage.

2. Select the Common tab.

3. Click Add.

Enter:

Type

Select:

BYOC-P

This is the carrier connection type.

Do not select BYOP-P unless you are configuring a separate PBX connection.

Region

Select the region associated with your Zoom deployment.

Where the configuration allows a choice, use the appropriate region nearest your SBC.

The available regions depend on your Zoom provisioning.

Distribution

For a single SBC, select:

Sequential

If you have multiple SBCs, Zoom also supports load balancing.

For the first installation, one SBC is sufficient to establish the connection, provided its capacity and availability meet your needs.

Click Save.

The Route Group may require provisioning before it becomes available for calls.

14. Create a SIP Group

Zoom uses SIP Groups to link telephone numbers to Route Groups.

Navigate to:

Admin Center → Product configuration → Numbers → BYOC Configuration

Find SIP Groups.

1. Click Manage.

2. Click Add.

Enter:

The Route Group Source should be:

Common

Select the BYOC-P Route Group created earlier.

Click Save.

Your configuration now contains:

Voyced SBC
    |
    v
Voyced Route Group
    |
    v
Voyced SIP Group

The next step is to associate your telephone numbers with this SIP Group.

15. Add Your Voyced Telephone Number

Navigate to:

Admin Center → Product configuration → Numbers → Phone Numbers

Click:

Add Number

Select:

BYOC Number

A form opens.

Enter:

For example, enter:

+442012345678

Zoom recommends E.164 format for BYOC telephone numbers.

This means the country code is included and the number begins with +.

The SBC will handle the different format required by Voyced.

Confirm the required acknowledgement.

Click Submit.

Your Voyced telephone number should now appear under Phone Numbers.

Its source should identify it as a BYOC-Premises number.

16. Check the SIP Group Assignment

A BYOC number must be associated with the correct SIP Group.

Navigate to:

Product configuration → Numbers → Phone Numbers

Find your Voyced number.

Open its details.

Locate the source or SIP Group information.

Confirm:

If the SIP Group is incorrect:

1. Open the telephone number.

2. Find the SIP Group assignment.

3. Click Edit.

4. Select Voyced SIP Group.

5. Save.

The number must belong to a suitable Common SIP Group for incoming and outgoing PSTN calling.

A telephone number that exists in Zoom but has no valid SIP Group may not be able to make or receive calls through the SBC.

17. Assign the Number to a Zoom Phone User

To assign the Voyced number to a user:

1. Navigate to Product configuration → Numbers → Phone Numbers.

2. Find the Voyced telephone number.

3. Click the More menu.

4. Select Assign.

5. Choose User.

6. Select the receiving Zoom Phone user.

7. Click Save.

Example:

The user must have a valid Zoom Phone licence and the appropriate calling package.

Once assigned, the number becomes available to that user.

The user can answer incoming calls through the Zoom Workplace application or another supported Zoom Phone device.

18. Configure a Reception Call Queue

If several people should answer the same Voyced number, you can assign it to a Zoom Phone Call Queue.

Navigate to:

Admin Center → Product configuration → Phone system → Call Queues

1. Create a new Call Queue or select an existing one.

2. Enter a name.

3. Add the required members.

4. Configure the call distribution method.

5. Save.

Example:

Return to:

Product configuration → Numbers → Phone Numbers

Select your Voyced telephone number.

Click Assign.

Choose the Call Queue as the destination.

Save.

Incoming calls to the number will now be handled by the selected queue.

19. Configure an Auto Receptionist

Zoom Phone also supports Auto Receptionists.

These can answer incoming calls and direct callers to users or departments.

Navigate to:

Product configuration → Phone system → Auto Receptionists

Create or select an Auto Receptionist.

Configure:

• Greeting

• Business hours

• Closed hours

• IVR menu options

• Call destinations

For example:

Assign your Voyced number to the Auto Receptionist through Number Management.

Save.

Make an incoming test call to confirm the menu and destinations work.

20. Configure Additional Voyced Numbers

If several telephone numbers are delivered through one Voyced SIP account, they can share the existing SBC connection.

Add each number under:

Product configuration → Numbers → Phone Numbers

Select Add Number → BYOC Number.

Example:

Each number must:

1. Be added as a BYOC number.

2. Belong to the correct Zoom Phone site.

3. Be assigned to the Voyced SIP Group.

4. Have the correct user or service destination.

You do not normally need separate SIP registrations for additional telephone numbers delivered through the same Voyced account.

The SBC must preserve the called number so Zoom can distinguish between the DIDs.

21. Configure Outgoing Call Routing

Zoom normally routes outgoing calls through the SIP Group assigned to the user's telephone number.

For a standard installation, you may not need a separate Routing Rule.

Check that:

• The user has a Zoom Phone licence.

• The user has a suitable calling package.

• The user's telephone number belongs to the Voyced SIP Group.

• The SIP Group points to the Voyced Route Group.

• The Route Group contains the Voyced SBC.

The normal outgoing route is:

Zoom Phone User
    |
    v
Voyced SIP Group
    |
    v
Voyced Route Group
    |
    v
Voyced SBC
    |
    v
sip.voyced.eu

The SBC sends the call to Voyced after converting the destination number.

22. Create a Custom Routing Rule, If Required

If your organisation uses several external telephone providers, you may need more specific routing.

Navigate to:

Product configuration → Phone system → Company Info

Open:

Account Settings → Settings

Find:

Routing

Next to Routing Rules, click Manage.

Click Add Routing Rule.

Configure:

For example, a broad international number expression is:

^\+[1-9][0-9]{7,14}$

This matches international numbers with a leading +.

Use the Test function to confirm the number matches the intended rule.

When selecting a specific SIP Group, choose the group linked to your BYOC-P Route Group.

Save.

If your organisation already uses normal PSTN routing through the telephone number's assigned SIP Group, keep that arrangement.

Custom routing rules are mainly useful when different destinations need different connections.

23. Check Outbound Caller ID

Zoom Phone allows users to select or configure the caller ID used for outbound calls.

For the first test, use your assigned Voyced telephone number.

Example inside Zoom Phone:

+442012345678

The SBC must send an authorised caller ID towards Voyced.

For example:

442012345678

Check the SBC's outgoing SIP identity settings.

The relevant SIP headers may include:

• From

• P-Asserted-Identity

If your business has several authorised Voyced numbers, configure the appropriate caller ID selection for each user.

Do not present telephone numbers that your Voyced account is not authorised to use.

24. Configure Simultaneous Call Capacity

Your effective call capacity depends on:

• The simultaneous calls included with your Voyced service

• Your SBC session licence

• Your SBC processing capacity

• Zoom Phone configuration

• Any additional limits configured on the SBC

For example:

These values are examples.

Use the actual capacity available on your service.

If several Zoom users share one Voyced SIP account, their combined incoming and outgoing calls must remain within the service limit.

Configure suitable limits on the SBC where required.

25. Configure Firewall and Network Access

The SBC must communicate with Zoom and Voyced.

Zoom Phone Connection

Zoom publishes region-specific SIP signalling addresses and media networks.

Use the addresses assigned to your Zoom region.

The actual destination ports on your SBC may depend on your SBC configuration.

Voyced Connection

The Voyced-side RTP range depends on your SBC configuration.

The SBC must be able to send and receive the relevant signalling and media traffic.

NAT

If your SBC is behind NAT, check:

• Public IP address

• SIP signalling addresses

• RTP media addresses

• Firewall session handling

• Correct TLS access from Zoom

• Correct SIP registration towards Voyced

The Zoom and Voyced connections must be tested separately.

26. Configure Emergency Calling

Zoom Phone supports emergency calling policies and emergency addresses.

The correct configuration depends on your country, number type and carrier connection.

Review the existing emergency calling setup under Zoom Phone administration.

Confirm:

• The intended emergency call route

• Whether your Voyced service supports the required emergency destinations

• The caller's emergency location information

• Any site-based emergency calling settings

• The required caller ID

Keep an existing approved emergency calling route in place unless the new route has been verified.

Normal international call routing does not automatically establish the correct emergency calling service.

Testing Your Setup

1. Test Voyced SIP Registration

Open the SBC administration interface.

Find the Voyced SIP connection.

Expected status:

Registered

Check that the registrar is:

sip.voyced.eu

If registration fails, review:

• SIP username

• Authentication username

• Password

• Registrar hostname

• SIP destination port

• DNS resolution

Do not continue with incoming call testing until registration works.

2. Test Zoom SBC Connectivity

In Zoom Administration, open:

Product configuration → Numbers → BYOC Configuration

Check:

• SBC is In-Service.

• Route Group is configured.

• SIP Group exists.

• The correct SBC is assigned.

• The SBC responds to SIP OPTIONS.

Zoom monitors SBC availability using SIP OPTIONS messages.

If the SBC does not respond correctly, Zoom may stop routing calls through that connection.

Check the SBC's Zoom-facing TLS connection and SIP OPTIONS handling.

3. Test an Outbound Call

1. Open Zoom Workplace.

2. Select Phone.

3. Open the dial pad.

4. Enter an international telephone number.

5. Place a call.

Example:

+442012345678

Zoom routes the call through the SIP Group and SBC.

The SBC converts the number to:

442012345678

before sending it to Voyced.

Check:

• The correct SIP Group is selected.

• The SBC receives the call.

• The number translation works.

• Voyced accepts the call.

• The destination rings.

• Two-way audio works.

• The correct caller ID appears.

4. Test an Incoming Call

1. Call your Voyced number from an external mobile telephone.

2. Confirm the SBC receives the incoming SIP call.

3. Check the called number.

4. Confirm the SBC converts it to Zoom's international format.

5. Check Zoom receives the call.

6. Verify the correct user, queue or Auto Receptionist rings.

7. Answer the call.

8. Test two-way audio.

Example:

Test each additional Voyced DID separately.

5. Test a Call Queue or Auto Receptionist

If your Voyced number is assigned to a shared telephone service:

1. Call the number.

2. Confirm the greeting plays.

3. Check the configured routing.

4. Test the available menu options.

5. Confirm calls reach the correct destination.

6. Check the configured no-answer destination.

If you have business hours and closed hours, test both configurations.

6. Test Simultaneous Calls

Place more than one call at the same time, within your Voyced service capacity.

For example:

1. Start an outbound call.

2. Keep it connected.

3. Place an incoming call to another Zoom user.

4. Confirm both calls remain active.

5. Check audio in both directions.

If the second call fails, review the SBC and service capacity settings.

Troubleshooting

Zoom Phone Cannot Register Directly to Voyced

Zoom Phone does not support external SIP REGISTER authentication in the same way as a traditional PBX.

The normal Voyced connection requires an SBC that can register with Voyced and connect to Zoom using BYOC-P.

Do not enter sip.voyced.eu as though it were a direct Zoom Phone registration server.

BYOC Configuration Is Missing

Check:

• Zoom Phone subscription

• BYOC-P availability

• Administrator permissions

• Account provisioning

The BYOC-P feature must be available on your Zoom account.

If it is not enabled, the SBC, Route Group or SIP Group configuration may not appear.

SBC Is Not Reachable

Check:

• Public SBC IP address

• Zoom-facing TLS port

• Firewall rules

• SBC certificate

• Zoom signalling addresses

• SIP OPTIONS handling

The SBC must accept the required signalling from Zoom's assigned region.

SBC Is In-Service but Calls Fail

In-Service means Zoom is permitted to route calls to the SBC.

It does not confirm:

• Voyced SIP registration

• Correct SIP routing

• Number translation

• Audio connectivity

Test both connections separately.

Voyced SIP Registration Fails

Check:

• Registrar is sip.voyced.eu.

• Username is correct.

• Authentication username is correct.

• Service password is correct.

• Registration is enabled.

• Destination port is UDP 5060.

• DNS resolution works.

Look for the final 200 OK response to the authenticated REGISTER request.

401 or 407 Error

These responses indicate SIP authentication is required.

An initial authentication challenge may be normal.

If authentication repeatedly fails, check:

• SIP username

• Service password

• Authentication realm

• Registration credentials

• Subsequent authenticated REGISTER requests

For outgoing calls, also check the SBC's INVITE authentication settings.

403 Error

Check:

• Voyced account status

• SIP authentication

• Caller ID authorisation

• Calling permissions

• Any account restrictions

If the error comes from Zoom, review the Route Group, SIP Group and telephone number assignment.

404 Error

Check:

• Called number

• Number translation

• SIP Request-URI

• Incoming DID assignment

• Outbound routing

• Which system returned the response

For example, if the SBC sends:

+442012345678

to Voyced, review the outgoing number translation.

The number should be:

442012345678

Incoming Calls Do Not Ring

Check:

• Voyced registration

• SBC incoming route

• Incoming number translation

• Zoom SIP Group

• BYOC number assignment

• Receiving user or service

• Zoom SBC connectivity

If the SBC receives the call but Zoom does not recognise the destination, inspect the called number in the SIP Request-URI.

Zoom expects the correct international number for the assigned DID.

All Incoming Calls Reach One Destination

Check whether the SBC preserves the actual called telephone number.

Several Voyced DIDs may share one SIP registration.

The SBC must not replace every incoming called number with the registered account number.

Inspect the incoming SIP INVITE and the called number sent towards Zoom.

Outbound Calls Do Not Use Voyced

Check:

• User's Zoom Phone licence and calling package

• Assigned telephone number

• SIP Group assignment

• Route Group assignment

• SBC availability

• Custom Routing Rules, if used

For normal BYOC-P calling, the SIP Group assigned to the user's telephone number determines the carrier route.

Incorrect Number Format

Zoom uses:

+442012345678

Voyced expects:

442012345678

Check the SBC's number translation rules.

Make sure the correct rule applies in each direction.

Do not remove the country code.

Incorrect Outbound Caller ID

Check:

• Zoom caller ID settings

• Assigned telephone number

• SBC From header

• SBC P-Asserted-Identity

• Number translation

• Authorised Voyced numbers

For the first test, use your registered Voyced telephone number.

One-Way Audio

Check:

• Zoom SRTP connectivity

• SBC media configuration

• Voyced RTP connectivity

• Firewall rules

• NAT handling

• Codec negotiation

• SDP media addresses

The SBC must handle audio correctly on both connections.

Successful SIP registration does not guarantee working telephone audio.

Calls Disconnect After Approximately 30 Seconds

Check:

• SIP ACK delivery

• TLS signalling

• UDP session handling

• NAT configuration

• Firewall timeouts

• SBC SIP timers

Inspect the SIP signalling on both the Zoom and Voyced sides of the SBC.

Incoming Calls Receive 488 Not Acceptable Here

Zoom requires a compatible SIP INVITE containing an SDP media offer.

Check:

• Early Offer configuration

• Audio codecs

• SRTP encryption

• DTMF telephone-event signalling

• SDP formatting

The SBC must send the media offer with the initial INVITE.

Also confirm that the selected codecs and encryption methods are supported by Zoom.

SIP OPTIONS Fail

Zoom uses SIP OPTIONS to check SBC availability.

Check:

• The SBC responds to OPTIONS requests.

• The correct source addresses are permitted.

• TLS connectivity is working.

• The SBC uses the correct signalling port.

• The Route Group is configured for the correct region.

An SBC that fails OPTIONS monitoring may be removed temporarily from call routing.

Calls Fail After Transfer

Check:

• SBC transfer settings

• SIP REFER handling

• Re-INVITE handling

• Number translation

• Media negotiation

• Destination availability

Use your SBC manufacturer's Zoom Phone interoperability settings.

Simultaneous Call Capacity Is Reached

Check:

• Voyced service capacity

• SBC session capacity

• Current active calls

• Any SBC call admission limits

Configure the limits according to your available service.

Reviewing Call Logs

Zoom provides call logs and quality monitoring.

Open:

Admin Center → Product configuration → Phone system

Use the available phone logs and dashboard reports to inspect failed calls.

For detailed SIP troubleshooting, use the SBC's diagnostic functions.

Inspect:

• SIP INVITE

• SIP REGISTER

• Request-URI

• From

• To

• P-Asserted-Identity

• SIP response codes

• SDP information

• RTP and SRTP negotiation

Check both the Zoom-facing and Voyced-facing calls.

This helps identify whether a problem occurs before the SBC, inside the SBC or on the external carrier connection.

Final Tips

• Zoom Phone cannot register directly with Voyced.

• Use BYOC-P with a suitable SBC.

• Confirm the SBC supports SIP registration to external providers.

• Configure the Zoom connection using TLS and SRTP.

• Configure the Voyced connection using standard SIP registration.

• Keep the Voyced SIP server set to sip.voyced.eu.

• Use your Voyced telephone number as the SIP username.

• Use your Voyced service password for authentication.

• Use UDP destination port 5060 towards Voyced.

• Use G.711 A-law and G.711 μ-law for the Voyced connection.

• Add the SBC in Zoom BYOC Configuration.

• Create a BYOC-P Route Group.

• Create a Common SIP Group linked to that Route Group.

• Add each Voyced telephone number as a BYOC number.

• Assign each number to the correct Zoom user, Call Queue or Auto Receptionist.

• Use international numbers beginning with + inside Zoom.

• Remove the leading + before sending calls to Voyced.

• Add the leading + when routing incoming calls towards Zoom.

• Present an authorised outbound caller ID.

• Check emergency calling separately.

• Test SIP registration, inbound calls, outbound calls and audio.

Zoom Phone supports external telephone providers through its BYOC-P service.

With a suitable SBC, the correct Zoom configuration and successful Voyced SIP registration, you can use your Voyced telephone numbers for incoming and outgoing business calls through Zoom Phone.

Last updated: 27/10/2026

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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.