1. Choose Network > T1 Configuration.

  2. Scroll to Link Layer settings.

  3. Choose from the following protocol types:

    1. HDLC-Default

    2. Cisco HDLC

    3. PPP over HDLC

    4. Frame Relay ANSI—PPP over Frame Relay may be enabled. Select the Use PPPoFR checkbox to activate additional configuration fields in Frame Relay Settings and refer to Configuring Frame Relay Settings.

    5. Frame Relay CCITT—PPP over Frame Relay may be enabled. Select the Use PPPoFR checkbox to activate additional configuration fields in Frame Relay Settings and refer to Configuring Frame Relay Settings.

  4. Click Submit. Refer to Submit Configuration Changes for more information on submitting your configuration changes.