Nortel Networks 553-3001-211 Busy tone detect, Loss switching, Detection limits, 400 to 620 Hz

Page 796 of 894 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

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

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:

Frequency

Level

Cadence

400 to 620 Hz

–30 to 0 dBm

See on page 791.

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.

553-3001-211 Standard 2.00 September 2004