Do ATA Adapters support SRTP?

Updated: 10/17/2024

Objective

Determine if Secure Real-Time Transmission Protocol or SRTP should be "Enabled" for ATA Adapters commonly used for traditional telephony devices; analog phones, overhead paging devices, analog fax machines.
SRTP if available depending on device (See Divice list below) is incompatible with FAX, Modems or Point of Sale Devices and should be disabled.

Applies To

  • Admin Console
  • 8x8 Supported ATA

Device List

Device List Model(s) SRTP Yes or No
Audiocodes MP1xx No
Poly / Obihai OBI300, OBI508 No
Grandstreams HT801, 802, 813 and 818 Yes

Procedure

Admin Console has disabled the SRTP option for Audiocodes and Obihai ATA's.

Enable or Disable SRTP on an 8x8 Supported Grandstream

  1. Log in to Admin Console.
  2. Click Users and locate the Grandstream device you wish to enable or disable
  3. To the right of the user for whom you want to disable SRTP, click the Edit (pencil icon).
  4. Go to Voice Basic Settings.
  5. Find Enable Secure Real-time Protocol. The slider position to the left and grey color indicates the option is "Disabled". 
    • Note: If there is no activated device associated with this user, the option to enable or disable SRTP will not be available. SRTP is enabled by default when setting up a device for the first time.
    • Ensure you are selecting the correct adapter based on port assignment.
  6. The device will reboot. Once it has finished rebooting, SRTP will be enabled or disabled based on what was chosen.
  7. To confirm if SRTP is has been disabled correctly, please reach out to Support. Since there is no display on the ATA Adapters, there is no visual confirmation available.

Known Issues

If SRTP is enabled on ATA Adapters, the following issues can be experienced among other abnormal behaviors:
  1. Static noise during call
  2. Inability to send and receive fax transmissions
  3. Outbound calls will fail.
  4. Inability to connect to analog telephony equipment such as

Best Practice

It is recomended not using SRTP for the following deployment types:
  • Door buzzers/ Doorbells
  • Analog paging interface
  • POTS based alarm systems
  • FAX
  • Modems
  • Overhead paging