Chapter 6: Modem Guide
6-14 CSMIM-T1 Hardware Installation Guide
6.5 ERROR CORRECTIONMNP Classes
The modem provides MNP Class 10 and supports MNP Class 5 data
compression. It is compatible with all MNP products. Its enhanced MNP
service is completely transparent to the user.
Class 10: Adverse Channel Enhancements (ACE) optimizes performance
under poor line conditions. Class 10 continues to provide compatibility
with non-MNP modems. It improves initial connection success rate by
making multiple negotiation attempts when configured for auto-reliable
mode. It uses Dynamic Transmit Level Adjustment to calculate optimal
transmit levels automatically to compensate for cellular phone signal
distortion. It lets the user configure the modem to negotiate the link at a
low-speed modulation, then upshift to a higher speed after negotiation. It
improves link performance during adverse channel conditions by
aggressive Adaptive Packet Assembly. It maximizes throughput by
continuously monitoring line quality and link performance, and
dynamically upshifting or downshifting to the optimum modulation
speed.
Class 5 provides data compression, which combined with MNP
Class 4 allows throughput of almost twice the connection speed.
Class 5 dynamically adjusts to the type of data being transmitted for
maximum compression efficiency.