Supervisory tone levels on ATA's?

Discussion in 'UK VOIP' started by Paul Westwell, Jul 20, 2005.

  1. Hi all,

    I can find reference from BT in SIN 350 as to what supervisory tones consist
    of and their level range but no specific recommendation for levels.

    Is there anything that specifies this?

    Regards,

    Paul
    Paul Westwell, Jul 20, 2005
    #1
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