Instruction manual

Page 1464 of 3156 Extended Multifrequency Compelled Sender/Receiver
553-3001-306 Standard 10.00 January 2002
In support of the NT5K21AA card, the Meridian 1 software has been
modified as follows:
• Four DS-30X channels are provided for simultaneous generation and
detection (forward and backwards) of MFC digits
• Four DS-30X channels are provided for alternate generation and
detection of MFE digits (software selectable)
• A DS-30X channel of A10 formatted signaling is provided for
communication between the Meridian 1 CPU and the NT5K21AA pack
• A-law and µ-law PCM encoding schemes are both supported
• Any one of 16 tone output levels may be specified for each channel
• Any one of four levels may be specified as a minimum receiver
acceptance level
• Special MFC functions, such as pulse or automatic mode, are provided
• Card-ID information, configured during the manufacture of the
NT5K21AA pack, is stored in the EEPROM message
• Hardware self-test and troubleshooting capabilities, including loop-back
of PCM channels at the NT5K21AA, are provided by maintenance
software, and
• The standard faceplate Enable/Disable Status Indicator LED is provided.
Most of the existing command structure for signaling has been maintained,
with the following exceptions:
• During RESET, the NT5K21AA card is configured as either MFC or
MFE, and as either A-law or µ-law
• More comprehensive self-test results are provided
• The minimum receiver acceptance level (MFL) is downloaded, and
• An extended range is provided for the MFC digit level (MFL).
Operating parameters
Both A-law and µ-law, which are software selectable, are supported. But
when a Companding Law is selected in LD 97, it is supported on a system
basis.