Busy tone detect, Loss switching – Nortel Networks Circuit Card User Manual
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NTCK16 Generic Central Office Trunk cards
553-3001-211 Standard 3.00 August 2005
Detection limits
Pulses detected by the NTCK16AX circuit card must be within the following
limits:
Busy tone detect
Busy tone is sent by the Central Office to indicate the release of an established
call.
Detection limits
The NTCK16AX and NTCK16BX generic Central Office trunk cards can
detect busy tone within the following limits:
Loss switching
The Generic XFCOT is based on the XFCOT design, which is using a static
pad download algorithm by default for its loss plan.
The generic XFCOT has to be set explicitly to a Dynamic Pad Switching
mode to make it compliant with the standard North American Dynamic Pad
Switching mode.
Frequency
11 880 to 12 120 Hz
Level
105 to 1100 mVrms
Note: The pack should not be
used to detect levels of 1100
mVrms or greater a Tip and Ring,
as this may result in noise.
Pulse length
Dependent on PPID – see LD 14
Frequency
400 to 620 Hz
Level
–30 to 0 dBm
Cadence
.