Chapter

Troubleshooting the MGX 8220 Shelf

General Troubleshooting Procedures

The MGX 8220 shelf run self-tests continuously to ensure proper function. When the unit finds an error condition that affects its operation, it downs the card or line that is affected. If it is caused by a card failure and there is a redundant card, the failed card is downed and the standby card becomes the active card.

The fail lights on the cards indicate that the system has found these cards defective in some mode, and now considers them as failed cards. See Table 8-1to find the cause and obtain information on replacing the failed component.

Table 8-1 Troubleshooting the MGX 8220 Shelf Node

Symptom

Probable Cause

Remedy

 

 

 

 

No front panel LEDs

Circuit breakers on the MGX 8220

Press the black button on the power entry modules to switch

are lighted.

shelf power entry modules

on the circuit breakers. If a problem persists, pull all cards and

 

 

switched off.

power supplies out to see if a shorted card or supply exists.

 

 

 

 

 

 

MGX 8220 shelf power cord plug

Reconnect power cord.

 

 

disconnected from AC supply.

 

 

 

 

Card front panel FAIL

Card failed self-test.

Check status of card at control console entering the dspcds

LED lit.

 

screen. If the alarm is confirmed, try the card reset (resetcd

 

 

 

command). Finally, remove and replace the card.

 

 

 

Card STBY LED on.

Card is off-line.

Not a problem as long as a primary card is active.

 

 

 

BNM major or minor

Service-affecting (major) or

Check event log to identify problem reported.

LED on.

nonservice affecting (minor)

 

 

 

system fault.

 

 

 

 

 

 

 

Network trunk failed.

Observe port LEDs on each BNM.

 

 

 

Use control console dspln to locate failure.

 

 

 

 

 

 

Internal temperature is higher than

Check front of cooling assembly for freedom of air flow.

 

 

normal resulting from blocked air

Replace the assembly that might have failed or slowed. Check

 

 

flow or defective fan.

free air flow in plenum chamber, remove blockage if

 

 

 

necessary.

 

 

 

ASM HIST LED lit.

If no other alarm indications, a

Press ASM HIST (history clear) button. Check NMS event log

 

 

fault occurred in the past but has

to determine cause.

 

 

been cleared.

 

 

 

 

BNM PORT LED is

Trunk is in local or remote alarm.

Use short BNM loopback cable line module connector for

red.

 

local test of trunk. Loop trunk at DSX-3 crossconnect to check

 

 

 

cable.

 

 

 

ASC FAIL LED

Downloading system software or

Wait for download to complete.

flashing.

configuration data.

 

 

 

 

 

 

Cisco MGX 8220 Installation and Configuration

8-2

Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003

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Cisco Systems MGX 8220 manual General Troubleshooting Procedures, Symptom Probable Cause Remedy, ASC Fail LED
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MGX 8220 specifications

The Cisco Systems MGX 8220 is a versatile, high-performance media gateway that has become an integral component in the telecommunications infrastructure. Designed to facilitate the transition from traditional circuit-switched networks to advanced packet-switched environments, the MGX 8220 supports a wide array of voice, video, and data services, making it an essential tool for service providers and enterprises seeking to enhance their network capabilities.

One of the key features of the MGX 8220 is its robust signaling and media processing capabilities. Equipped with support for both Voice over IP (VoIP) and traditional telephony protocols, this gateway enables seamless integration of different communication formats. It boasts a modular architecture, which allows for the addition or removal of various line cards to meet changing demands and technology advancements. This modularity provides operators with the flexibility to scale their services without significant overhauls to their existing infrastructure.

The MGX 8220 is capable of delivering high-density media handling for a multitude of services. With its support for ATM and IP networks, the gateway can handle TDM (Time-Division Multiplexing) to packet voice conversions efficiently. It is designed to optimize network resources by dynamically allocating bandwidth based on traffic requirements, thus ensuring efficient use of network resources and improved performance.

Another significant characteristic of the MGX 8220 is its enhanced quality of service (QoS) features. This capability ensures that voice and video traffic is prioritized appropriately, minimizing latency and jitter while maximizing overall call quality. By employing sophisticated traffic management techniques, the MGX 8220 can deliver a superior user experience, which is critical for any service provider aiming to offer competitive communication solutions.

Furthermore, the gateway includes built-in security features to protect against unauthorized access and ensure the integrity of sensitive data. This includes encryption for voice and video transmission, as well as support for secure signaling protocols.

Overall, the Cisco Systems MGX 8220 stands out as a comprehensive media gateway solution, providing essential functionalities for modern communication needs. Its combination of modularity, high-density processing, effective QoS management, and security features makes it a compelling choice for organizations looking to modernize their telecommunications infrastructure while ensuring reliability and performance. As businesses continue to evolve and demand more from their networks, the MGX 8220 offers a pathway to future-ready communications.
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