Connect Yeastar to Cloud SIP

How Yeastar connects to Cloud SIP

Yeastar is a PBX (private branch exchange, a business phone system). You set it up in two places:

• The Enfonica Console. You create a SIP domain, which is your SIP trunk, and tell your phone numbers where Yeastar is.
• Yeastar. You add that SIP domain as a trunk, and set the caller IDs it sends.

Yeastar doesn't register to Cloud SIP. Cloud SIP recognizes your outgoing calls by the SIP domain in each call and your Yeastar's public IP address. It sends incoming calls to the address you give it.

Yeastar's screens differ between models and releases, so this guide gives the value each setting needs rather than every step. If a label on your system differs, look for the setting that does the same job.

Create your SIP domain

1. Sign in to the Enfonica Console, and go to Cloud SIP.
2. Select New SIP domain, and create a Standard SIP domain, such as acme-yeastar. It's ready instantly, with a name like acme-yeastar.sip.enfonica.com.
3. Under Termination settings, set Call termination mode to PSTN Trunk, so that outgoing calls go to the phone network.
4. Under IP access control list, select Add IP range, and enter your Yeastar's public IP address with /32 on the end, for example 203.0.113.10/32.
5. Select Save Changes. Changes take up to a minute to apply.

Add the trunk in Yeastar

Add a trunk in Yeastar with these values. The trunk type matters most. Choose Yeastar's IP-based trunk, which sends calls to a SIP server without registering.

Cloud SIP identifies your trunk by the SIP domain in each call. A single wrong letter in the hostname gives 403 Forbidden, the same as a missing IP address.

Allow Enfonica through your firewall

Cloud SIP sends call signaling and call audio from different addresses. Allow all four addresses in both directions, in the firewall in front of Yeastar and in any IP allow list on Yeastar itself.

Each is a single address. Where Yeastar asks for a subnet mask, enter 255.255.255.255, which is the same as /32. Incoming calls can come from either signaling address, so add both.

Set caller IDs

Every outgoing call needs a real number you hold as its caller ID, in +E.164 (full international format with a plus), for example +61255501234. Set it on the trunk or on each extension, whichever your system uses.

• A number missing its area code, a name, or the word "anonymous" is refused with 484 Address Incomplete. The Console shows it as "Could not parse CLI".
• Private (withheld) calls work as they are. Yeastar sends your real number marked as private, and the person you call sees a private number.
• Leave the trunk's Privacy ID option off. It hides your caller ID on every outgoing call, not only the ones you want private.

Calls from private numbers that Yeastar forwards out, such as to a mobile or an answering service, need no change. Yeastar passes the caller's "anonymous" through, and Cloud SIP presents one of your project's numbers instead, so the forwarded call stays private.

Send incoming calls to Yeastar

Because Yeastar doesn't register, you need to tell Cloud SIP where it is. Create a load balancer once, and then point each number at it.

1. In the Console, go to Cloud SIP, and open your SIP domain.
2. Under Load balancers, select Add load balancer, and enter an Alias ID, such as yeastar.
3. Select Add endpoint.
4. In Endpoint URI, after the sip: that's already shown, enter your Yeastar's public IP address or hostname, for example 203.0.113.10. If your Yeastar receives SIP on another port, add the port, for example 203.0.113.10:5070.
5. Select Add, select Save, and then select Save Changes.
6. Go to Phone Numbers > My numbers, and open a number.
7. Under Call settings, in Incoming call handlers, select Add, and then select SIP.
8. Select Load balancer, and then select your load balancer.
9. Select Save Changes.

Repeat steps 6 to 9 for each number.

Cloud SIP sends the number that was called in +E.164, such as +61255501234, so your Yeastar inbound routes need to match numbers in that format.

A load balancer can also send calls to a second site or to voicemail if Yeastar is offline. To learn how, see Send incoming calls to more than one PBX or site.

Keep your Yeastar secure

Anyone who takes over a phone system can make calls that you pay for, so protect your outgoing trunk:

• Use strong, unique passwords for the Yeastar admin and every extension.
• Review who has access.
• If you don't need international calling, turn it off in Yeastar.

If Enfonica detects suspected toll fraud, we might turn off outgoing calls on the trunk to protect you. To learn how to secure the system and turn outgoing calls back on, see our toll fraud guide.

Check that it worked

1. Call a mobile from a Yeastar extension. The mobile rings and shows your caller ID.
2. Call one of your Enfonica numbers from a mobile. It rings on Yeastar, and you can hear each other both ways.
3. In the Console, go to Cloud Voice > Calls. Both test calls are listed there with their SIP traces.

If a test call fails, its SIP response code points to the cause. To find the code, see Find a call and read its SIP trace. To learn what each code means, see Outbound calls aren't going through.

Questions