Bland AI on a Jamaican Number: Bring Your Own SIP Trunk with WOCOM

Bland AI is a voice-agent platform aimed at businesses with high call volumes: support lines, lead follow-up, appointment reminders. It supports bring your own SIP trunk, and that is the only way to put a Jamaican number on it, because the number must stay with your carrier. Bland states plainly that a Bland-provisioned number will not work on a customer trunk.

What You Need

• A WOCOM number on Cloud PBX or a SIP trunk, with TLS and SRTP enabled. Bland does not accept plain SIP on port 5060.
• A Bland account with an agent or pathway ready.
• Your Bland API key, to look up the correct SIP server for your account.

Step 1: Find Your Bland SIP Server

Bland runs SIP servers in several regions (US, Canada, Asia and Europe). The documentation shows addresses such as us2.sip.bland.ai:5061;transport=tls, but the pages are not fully consistent, so the reliable way is to ask the API: call GET /v1/sip/outbound-setup and use the sip_server it returns. For Jamaica the US region is the natural choice.

Signalling is TLS 1.2 or later on TCP port 5061, and the certificate is issued by Let's Encrypt (ISRG Root X1), which the WOCOM side must trust.

Step 2: Create the Trunk and Attach Your Number

1. Create the trunk in Bland's Setup Wizard, or with POST /v1/sip/trunks.
2. Attach your Jamaican number in E.164 form (+1876XXXXXXX) in the wizard, on the trunk's Numbers tab, or with POST /v1/sip/attach, which takes up to 100 numbers at a time.
3. Choose authentication. Bland recommends IP-based trust. It can also register like a phone, or send a username and password on each call.

Step 3: Ask WOCOM to Route the Number

Send WOCOM support the following:

• The Jamaican number(s) you want answered by the AI, written in E.164 form (for example +1876XXXXXXX or +1658XXXXXXX).
• The platform's SIP address for inbound calls (shown below for this platform).
• Whether the AI also needs to place outbound calls, and from which number.
• Where calls should go if the AI hands a caller to a person: an extension, a ring group, or a mobile number.

Give WOCOM the sip_server from step 1 and Bland's published US addresses. Signalling comes from 35.82.60.77 and 52.27.163.2; media comes from 52.13.231.129, 35.160.144.213, 44.234.13.26 and 54.218.96.252. All six must be allowed. Because the published lists have differed between pages, also check Bland's live firewall-IPs API before go-live. Audio is SRTP (AES_CM_128_HMAC_SHA1_80) on UDP ports 16384–32768.

Codecs and Keypad

Bland supports PCMU, PCMA, G.722 and Opus, with G.729 available through advanced settings (PATCH /v1/sip/config). Use G.722 for the clearest audio on the WOCOM network. Keypad presses are sent as RFC 2833 events.

Outbound Calls and Transfers

For outbound calls, Bland sends a new call to your WOCOM trunk, which must accept Bland's media addresses. Bland's 2025 changelog listed outbound SIP as an Enterprise feature; its current SIP page does not, so confirm with Bland for your plan.

Transfers use SIP REFER on the live call, or a new call that bridges the caller. Warm transfers can use REFER with Replaces, so the agent briefs a person before connecting them. Ask WOCOM to allow REFER on your route.

What It Costs (November 2026)

Bland listed about US$0.14 per minute on its Start plan and US$0.12 per minute on Build (US$299 per month). Customers on their own trunk pay their carrier for the call and pay no transfer fee. WOCOM call charges apply as normal.

Is Bland Right for You?

Bland suits teams running large outbound or support campaigns that need volume pricing and are comfortable with TLS-only connections. For a front-desk receptionist, WOCOM AI is included with Cloud PBX. See the platform comparison, or ask WOCOM to enable TLS and route your number to Bland.