
Defining Operating Parameters
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Port RTS-DCD Simulation
This parameter specifies the RTS-DCD simulation method for each port or shared group
when dial backup connections are established. The options are V.13, Out of Band, and
Disabled.
Note: When operating with another DAP equipped with ISDN IDBU, do not set this
parameter to out of band. ISDN IDBU does not provide out of band RTS-DCD
simulation.
Ring Detect
This parameter specifies the method the DAP uses to answer calls. Two options are
available:
• Short - AT&T standard. Short ring detection is as specified in the AT&T
publication on Switched 56 Kbps operation. For short ring detection logic,
timing is +/-4 milliseconds. Data Mode Idle (DMI) must occur for 72
milliseconds before it is considered an incoming call (ring indication).
• Long - The long ring detection logic is designed to minimize sensitivity to noise
which could cause erroneous recognition of incoming calls. However, it does not
comply with the AT&T Specification. DMI must occur for 1 full second before
it is considered an incoming call (ring indication).
This parameter should be set to Long for most applications.
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