Xmfc Sender And Receiver Specifications - Meridian Nortel 1 Option 11C Technical Reference Manual

Page 404 of 544

XMFC sender and receiver specifications

Table 125
XMFC sender specifications
Forward frequencies in DOD mode:
Backward frequencies in DOD mode:
Frequency tolerance:
Power level at each frequency:
Level difference between frequencies:
Harmonic Distortion and Intermodulation
Time interval between start of 2 tones:
Time interval between stop of 2 tones:
553-3011-100 Standard 14.00
NT5K21 XMFC/MFE card
Receive mode
When in receive mode, the XMFC/MFE card is linked to the trunk card by a
PCM speech path over the Meridian network cards. MFC signals coming in
over the trunks are relayed to the XMFC/MFE card as though they were
speech. The XMFC/MFC card interprets each tone pair and sends the
information to the CPU through the CPU bus.
Send mode
When in send mode, the CPU sends data to the XMFC/MFE card through the
CPU bus. The CPU tells the XMFC/MFE card which tone pairs to send and
the XMFC/MFE card generates the required tones and sends them to the trunk
over the PCM network speech path. The trunk transmits the tones to the far
end.
Tables 125 and Table 126provide the operating requirements for the
NT5K21 XMFC/MFE card. These specifications conform to CCITT R2
recommendations: Q.441, Q.442, Q.451, Q.454, and Q.455.
January 2002
1380, 1500, 1620, 1740, 1860, 1980 Hz
1140, 1020, 900, 780, 660, 540 Hz
+/- 0.5 Hz from nominal
Selectable: 1 of 16 levels
< 0.5 dB
37 dB below level of 1 signaling frequency
125 usec.
125 usec.