ADTRAN 4200659L2 User Manual
Size:
1.66 Mb
Download

Chapter 8 Power Loss Recovery

The MX2800 STS-1provides backup measures of protection for both power supply and power source failures. The following sections describe the possible modes of operation:

Non-Redundant Power Mode, which offers no backup protection, is described on page 8-2.

Power Supply Recovery Mode, which offers backup protection in the event of power supply card failure, is described on page 8-3.

Power Supply and Source Recovery Mode, which offers a backup system for both card and source failure, is described on page 8-4.

Battery Backup Mode, which offers battery backup in the event of a power outage, is described onpage 8-5.

61200659L1-1

MX2800 STS-1User Manual

8-1

Chapter 8. Power Loss Recovery

NON-REDUNDANTPOWER MODE

In Non-RedundantPower Mode, the MX2800STS-1houses only one power supply card and only one power source is available. There is no power failure protection. If a power supply card fails, then the unit is inoperable until the card is repaired or replaced. SeeFigure 8-1 for an illustration.

MX2800 STS-1

Figure 8-1.Non-RedundantPower Mode

Power supplies are hot-swappable.

8-2

MX2800 STS-1User Manual

61200659L1-1

Chapter 8. Power Loss Recovery

POWER SUPPLY RECOVERY MODE

In Power Supply Recovery Mode, two power supply cards are installed and connected to a single power source (see Figure 8-2).In this mode, the MX2800STS-1can continue to operate during a power supply failure, without interrupting service. The power supplies are load sharing, so either power supply can provide power for the entire unit.

When the unit is configured with dual internal AC power supplies, this is the only power protection mode available.

MX2800 STS-1

Figure 8-2.Power Supply Failure Recovery Mode

61200659L1-1

MX2800 STS-1User Manual

8-3

Chapter 8. Power Loss Recovery

POWER SUPPLY AND SOURCE RECOVERY MODE

In this mode, two power supply cards are installed and are connected to two individual power sources. The MX2800 STS-1handles any combination of power source or power supply failure.

Much like the backup design for the controller cards, the MX2800 STS-1is able to internallyre-routethe power source if a power supply card and theopposite power source fail. For example, in the illustration given inFigure 8-3,failedPOWER SOURCE A is connected to functionalCARD A and functionalPOWER SOURCE B is connected to failedCARD B. In this case, the MX2800STS-1automatically connectsPOWER SOURCE B toCARD A.

This configuration is only available with DC power supplies.

STS-1

Figure 8-3.Power Supply and Source Failure Recovery Mode

8-4

MX2800 STS-1User Manual

61200659L1-1