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Number activation requires availability confirmation. Please contact support before funding your account.

Find the fault in your SIP connection methodically

Updated 2026-10-30 · Prepared by Call Global Communications Inc

Short answer: SIP registration, call signaling and audio transport can fail independently. Record the error and the point where it appears before changing settings, so each adjustment tests a specific cause.

For registration failures, compare the server, username, password, transport and port with the dashboard. For one-way audio, inspect NAT behavior, the firewall, codec choice and microphone permissions.

Put the number to work

For keypad failures, verify RFC 2833 or SIP INFO support in your client. Share error messages with support, but remove passwords and avoid publishing complete credential screenshots.

From selection to daily use

  1. Create your CallGlobal account using an email you can continue to access.
  2. Review the live country inventory and confirm the capabilities of the line you select.
  3. Choose the rental term, check the total and follow the payment instruction without rounding its amount.
  4. After activation, use the inbox and dialer or configure your SIP client; keep the line renewed if future access matters.

Fund the order carefully

Choose the coin and network offered by the payment screen before sending funds. CallGlobal accepts supported USDT and USDC routes; the checkout determines which routes are currently available. Transfer the complete displayed amount, including every decimal place.

A transfer with a different amount does not qualify for wallet credit. Never round a payment or subtract a withdrawal fee from it. If a transaction needs investigation, send support its hash and network without making another payment.

The CallGlobal service behind the number

A line includes incoming SMS and incoming calls without a quantity cap, together with a monthly allowance of 500 sent texts and 1,000 outbound voice minutes. Use the online inbox, browser dialer, forwarding or the SIP credentials supplied for that line.

The advertised annual option works out to $1.80 a month, with $21.60 charged for the year. Live checkout shows the selected term and total; renewals draw from the prepaid account wallet.

During the first 7 days you may exchange a number within its country up to twice without an extra rental charge; its existing expiry date stays in place. A separate 7-day refund option applies only when no incoming or outgoing call or SMS has used the line.

The subscription in detail

  • No monthly cap on inbound SMS or calls
  • Outbound allowance: 500 SMS and 1,000 minutes each month
  • SIP settings, forwarding controls and browser calling interface
  • Renewable access to your selected line
  • External account verification depends on the receiving platform
  • First 7 days: up to 2 eligible no-cost replacements
  • Refund eligibility for a line with no SMS or call usage within 7 days

The annual-plan equivalent starts at $1.80 per month, totaling $21.60 for the year. Wallet funding uses USDT or USDC and requires the exact displayed amount. Crypto payments are reviewed before credit.

Number activation requires availability confirmation. Please contact support before funding your account.

Frequently asked questions

What should I check before ordering?

For registration failures, compare the server, username, password, transport and port with the dashboard. For one-way audio, inspect NAT behavior, the firewall, codec choice and microphone permissions.

How will I manage the line after activation?

Your account dashboard provides the number controls and SMS inbox. Calls can use the browser dialer, compatible SIP software or the forwarding setting.

Can I keep using the same contact number?

Yes, while the rental remains renewed. Check the paid-until date and maintain the wallet balance needed for the next selected term.

What if the line is unsuitable?

Within 7 days of purchase, request up to two free same-country exchanges. The unused-number refund is separate and requires that no call or SMS has used the line.

Related guides and use cases

Sources