Troubleshooting guide

Index-3
POS
fail LED, 131 to 132
LOF LED, 129
LOP LED, 130
LOS LED, 127
power level
downstream, 66
PPP, 94
P-REI, 131
provisioning problems, 74
Q
QAM, 59, 60
16 QAM, 55
256 QAM, 64
64 QAM, 64
QPSK, 55, 60
quadrature amplitude modulation
see QAM
quadrature phase shift keying
see QPSK
R
RIP, 99 to 100
misconfigured version, 103
wrong version, 101
routing information protocol
see RIP
S
section, 132
service provider equipment
see SPE
setting
interleave depth, 56
SID, 69
signal quality, 53, 54, 59
signal-to-noise ratio, 55, 56, 61, 64
downstream path, 64
upstream path, 58
SNMP, 37
cable modem response to, 77
SONET, 127 to 134
b1-tca, 133
b2-tca, 133
b3-tca, 133
device, 95
SPE, 132
split horizon, 101
SRM (Supervisory Routing Module), 25
station maintenance requests, 69
system LED displays, 31
T
TCP ports, 120
thermal sensitivity, 67
U
UDP
broadcasts, 92, 93
unerroreds, 55, 60
uninterruptible power supplies (UPS), 23
UNIX
resolving host problems through, 82
upstream channel bandwidth, 62
upstream input power level
controlling, 61
upstream port LEDs, 32
User Datagram Protocol
see UDP, 92