in this part of this article we will first install the TLS certificate for the SBC .
Microsoft recommends that you request the certificate for the SBC by generating a certification signing request (CSR);Most Certificate Authorities (CAs) require the private key size to be at least 2048. Keep this in mind when generating the CSR.
The certificate needs to have the SBC FQDN as the common name (CN) or the subject alternative name (SAN) field.
SIP TLS Connection Configuration:
Open the TLS Contexts table (Setup menu > IP Network tab > Security folder > TLS Contexts).
Create a new TLS Context by clicking New at the top of the interface, and then configure the parameters :
Configure a Certificate:
This step describes how to request a certificate for the SBC and to configure it based on the example of DigiCert Global Root CA. The certificate is used by the SBC to authenticate the connection with Microsoft Teams Direct Routing. The procedure involves the following main steps:
a. Generating a Certificate Signing Request (CSR).
b. Requesting Device Certificate from CA.
c. Obtaining Trusted Root/ Intermediate Certificate from CA.
d. Deploying Device and Trusted Root/ Intermediate Certificates on SBC.
once you generated the CSR ; Copy the CSR from the line "----BEGIN CERTIFICATE" to "END CERTIFICATE REQUEST----" to a text file (such as Notepad), and then save it to a folder on your computer with the file name, for example certreq.txt and send certreq.txt file to the Certified Authority Administrator for signing.
In the SBC's Web interface, return to the TLS Contexts page, select the required TLS Context index row, and then click the Certificate Information link, located at the bottom of the TLS. Then validate the Key size, certificate status and Subject Name:
. In the SBC's Web interface, return to the TLS Contexts page.
a. In the TLS Contexts page, select the required TLS Context index row, and then click the Trusted Root Certificates link, located at the bottom of the TLS Contexts page; the Trusted Certificates page appears.
b. Click the Import button, and then select all Root/Intermediate Certificates obtained from your Certification Authority to load.
Click OK; the certificate is loaded to the device and listed in the Trusted Certificates store:
dont forget to Reset the SBC with a burn to flash for your settings to take effect.
Configure Media Realms :
Configure SIP Signaling Interfaces:
Configure Proxy Sets:
Configuring Proxy Set for Microsoft Teams Direct Routing :
Configuring Proxy Address for Microsoft Teams Direct Routing Interface:
Configure Coders :
This is it for this Part 2 .
Thanks for reading.