Nortel Circuit Card Installation Manual page 808

Page 808 of 906
Busy tone detect
Loss switching
553-3001-211 Standard 3.00
NTCK16 Generic Central Office Trunk cards
Detection limits
Pulses detected by the NTCK16AX circuit card must be within the following
limits:
Frequency
Level
Pulse length
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:
Frequency
Level
Cadence
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.
August 2005
11 880 to 12 120 Hz
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.
Dependent on PPID – see LD 14
400 to 620 Hz
–30 to 0 dBm
See on page 803.