Figure 6.The interface of VoIP Monitor Professional application VoIP Monitor Professional analyses the Voice over IP traffic by monitoring live RTP/RTCP traffic streams. The performance of a VoIP transmission network can be characterised mainly in terms of Packet Loss and Jitter. Figure 7.Jitter buffering and packet loss concealment Packet loss can degrade speech quality but effective packet loss concealment can cover up these degradations. Jitter can also affect speech quality if it exceeds the capacity of the jitter buffer or -9- the dynamic jitter buffer algorithm is inadequate. The jitter buffers, codecs and packet loss concealment techniques influence the speech quality in IP phones and gateways differently and there are wide variations between brands, models and software versions. MOS, jitter and packet loss trends are presented graphically on the VoIP Monitor screen
rules requiring that all pledging activities be reviewed by school authorities before going into effect and that adult advisers be present during initiation ceremonies. According to one national magazine, "the new 'code' set off a riot so violent that city police and fire detachments were afraid to enter campus." Resigning themselves to the inevitable, other college representatives have given up on the possibility of abolishing the degradations of Hell Week. "If hazing is a universal human activity, and every bit of evidence points to this conclusion, you most likely won't be able to ban it effectively. Refuse to allow it openly and it will go underground. You can't ban sex, you can't prohibit alcohol, and you proba- bly can't eliminate hazing!" (Gordon 8{ Gordon, 1963). What is it about hazing practices that make them so precious to these societies?
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