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All Sinch Elastic SIP Trunks support TLS and SRTP natively. For more information on TLS/SRTP encryption and the benefits of using it, please read more here.   To make encrypted calls with TLS simply send calls to your SIP Trunk FQDN on port 5061.   This port can only be used for TLS, and non-TLS calls will fail.  SRTP must be used when making a TLS call.   To ensure we send calls to your infrastructure using TLS go into your SIP Endpoint on your SIP Trunk and change the transport protocol to “TLS”.  Note, that the port on your SIP endpoint will update automatically to port 5061.  In the event your infrastructure is listening for TLS connections on a non-standard port simply change the port manually to the correct value.     Congratulations, your Sinch Elastic SIP Trunk is now configured to use encryption!  It’s that easy.   Let's Encrypt Certificates   Sinch Elastic SIP Trunking uses TLS certificates secured by Let’s Encrypt.  If your TLS SIP Infrastructure does not already trust certificates from this Certificate Authority you can download the Let’s Encrypt Root Certificate and associate Intermediate certificates here: https://letsencrypt.org/certificates/   Cypher Suite Support   Sinch trusts all well-known Certificate Authorities.  This ensures we will not have any trust issues when your infrastructure presents its certificate on inbound calls.   For negotiation Sinch supports the following Cypher Suites for both TLS and SRTP.   TLSv1.2   TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8 TLS_ECDHE_ECDSA_WITH_AES_256_CCM TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8 TLS_ECDHE_ECDSA_WITH_AES_128_CCM TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   TLSv1.3   TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 TLS_AES_128_GCM_SHA256 ... View more

Q: When are my invoices posted? A: Invoices close at the end of each calendar month and are posted three to four business days later.   Q: Where can I find my invoices? A: Your invoices are posted to your Dashboard. You can find them by expanding the Account Settings menu in the top right corner of the Dashboard and then navigating to the Billing section.   Q: Why do I see charges for 10 DLC MO, 10 DLC IQ MO, etc. on my invoice? A: You may see some unfamiliar references on your invoice. These denote the Monthly Recurring Fees for your telephone numbers. A description of each item is listed below. · 10 DLC IQ MO – US DIDs that were purchased through the Sinch Dashboard · 10 DLC MO – US DIDs that were ported into your account from another service provider or numbers we loaded on your behalf · US IQ TFN – US Toll Free numbers that were purchased through the Sinch Dashboard · US Voice Toll Free – US Toll Free numbers that “ported in” from another service provider or numbers we loaded on your behalf · CA10 DLC IQ MO – Canadian DIDs that were purchased through the Sinch Dashboard · CA 10 DLC MO – Canadian DIDs that were ported into your account from another service provider or numbers we loaded on your behalf   Q: How are projects shown on my invoice? A: When you look at your invoice, you will see your Usage Charges at the top, divided out by each of your project names. Below the Usage Charges section, you will see the Service Charges section, which shows the service charges for your entire account.     Q: What does Billing Period Usage indicate at the top of my Dashboard? A: For post-paid accounts, the Billing Period Usage is your credit limit minus your outstanding charges. It indicates what credit is still available to you.       You can see a more detailed breakout in the Dashboard, under Account Settings (top right corner) > Billing > Credit Management     Q: How are my payments applied to my account? A: When you make a payment, we will credit the amount to your account, and we will apply it to your invoice. If you see that your invoice status remains as Not Paid, please contact us.   Q: Is there a transaction fee for paying my invoice with a credit card? A: Yes, there is a 3% transaction fee for using a credit card to pay your invoice. Payments using wire transfer or ACH are not assessed this fee. When you remit payment with a credit card, we will post the amount paid (original invoice + 3%) to allow you to reconcile payments to invoices.   Q: Is there a minimum invoice amount before I get billed? A: Yes. Months when your invoice amount is less than $10 USD, you will not receive an invoice and no payment is necessary. ... View more