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Command Reference

12.0(3)T

DES Ctrl Reg#0 = C00C0C43, Reg#1 = 0

Table 7 describes the ﬁelds shown in the show controllers cable upstream display.

Table 7 show controllers cable upstream Command Field Descriptions

Field Description

Cable Slot number/port number indicating the location of the Cisco MC11

cable modem card.

Upstream is administratively down Indicates the RF upstream interface is disabled.

Frequency Transmission frequency of the RF upstream channel.

Channel Width Indicates the width of the RF upstream channel.

QPSK Symbol Rate Indicates the modulation technique for upstream transmission.

Spectrum Group 4 Indicates the spectrum group associated with this slot and port.

Nominal Input Power level Indicates the desired power level coming into the receiver.

Tx Timing Offset Indicates the current ranging offset on the channel.

Ranging Backoff Start Indicates how many ranging slots to backoff before resending the

ranging bursts after an upstream collision. Expressed as exponents

of 2. See Ranging Backoff End.

Ranging Backoff End Indicates how many ranging slots to backoff before resending the

ranging bursts after an upstream collision. Expressed as exponents

of 2. See Ranging Backoff Start.

Tx Backoff Start Indicates the starting exponential backoff value for data collisions.

Tx Backoff End Indicates the ending exponential backoff value for data collisions.

Modulation Proﬁle Group A set of burst proﬁles deﬁning an upstream range.

part_id= The part number of the Phy chip.

rev_id= The Phy chip revision number.

rev2_id= The Phy chip sub-revision number.

nb_agc_thr= Threshold used to control gain.

nb_agc_nom= Used to accelerate convergence of input power level.

Range Load Reg Size= Size, indicated by number of symbols, for range request bursts.

Request Load Reg Size= Size, indicated by number of symbols, for request bursts.

Minislot Size in number of Timebase

Ticks is

Size in tick units of upstream minislot. A tick is 6.25 microseconds.

Minislot Size in Symbols Size in symbols of the upstream minislot.

Bandwidth Requests Number of successful bandwidth requests received in the contention

minislots.

Piggyback Requests Number of successful bandwidth requests piggybacked with regular

data transmissions.

Invalid BW Requests Number of invalid bandwidth (BW) requests. (An example of an

invalid bandwidth request is a modem using a non-existent SID to

request bandwidth.

Minislots Requested Total number of minislots requested.

Minislots Granted Total number of minislots granted.

Minislot Size in Bytes Size in bytes of the minislot.

UCD Count Number of UCDs sent for this upstream.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 77 78

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