Cisco uBR924 설치 및 시작 - 페이지 16

{카테고리_이름} Cisco uBR924에 대한 설치 및 시작을 온라인으로 검색하거나 PDF를 다운로드하세요. Cisco uBR924 34 페이지. Cable access router

Verify Installation (continued)

LED

DSNR

Status

Possible Problem

Upstream LED is

Upstream signal is not reaching the

off.

headend; router is unable to

communicate with the remote end.

Systematic RF noise problem or other

outage.

Downstream

Systematic RF noise problem or other

signal-to-noise ratio

outage.

LED is off.

Suggested Action

Verify continuity back to the

headend using the standard

procedures for your system.

Temporarily locate the router closer

to the ground block, the tap, or

another tap closer to the

headend—ensuring correct RF input

levels at all times.

Verify correct RF input to the router.

Temporarily locate the router closer

to the ground block, the tap, or

another tap closer to the

headend—ensuring correct RF input

levels at all times.

Do not install the router unless your

system management expressly states

this is the procedure to follow. This

is an early indication of low quality

cable signals and indicates a high

likelihood of intermittent router

operation.