Cisco AS5400XM Manuel d'utilisateur télécharger pdf (Page 12)

Cisco AS5400XM High-Density Packet Voice/Fax Feature Card with DSP Modules or Universal DSPs

The Cisco AS5400XM High-Density Packet Voice/Fax Feature Card (AS5X-FC) and DSP Module (AS5X-PVDM2-64) bring greater

price/performance, higher density, and expanded codec and feature support to the Cisco AS5400XM Universal Gateway.

A universal DSP feature card is also available to support remote-access services in combination with voice and fax applications. The

universal DSP can execute multiple codec and modem algorithms on any DSP at any time. When the type of codec or modem required

for a specific call is determined, the DSP activates the appropriate service type in real time.

RELIABILITY

DSP Sparing and Pooling

The Cisco AS5400XM Universal Gateway is designed to meet high-availability requirements. The DSPs are pooled and can be configured

as hot spares. Because DSPs are allocated on a call-by-call basis, a DSP failure does not cause a DS-0 or B channel to be left without a

DSP to terminate the call, preventing occurrence of “holes” (unused channels) within a hunt group. Having spare DSPs in the pool also

allows DSP code to be updated without affecting active calls. DSP resources are tested at power-up and after disconnect to check for

defects. Any defective DSPs found are moved to the resource recovery pool. An automatic DSP recovery process can be activated to

recover DSPs in the recovery pool and add them back into the resource pool if possible.

Hot-Swappable Cards and Redundant Fans

Hot-swap capability on all cards allows hardware maintenance to be performed on an active Cisco AS5400XM Universal Gateway with

little or no service interruption. During a hot-swap, any card can be removed, inserted, or replaced, and only the calls on the card being

removed are affected. The Cisco AS5400XM chassis provides four high-capacity fans with front-to-back airflow for cooling.

Redundant Backhaul Methods

Three redundant methods that can be used to backhaul traffic from the server to the network are included by default on the Cisco

AS5400XM. The first method uses the two Gigabit Ethernet ports, which can be configured to run different types of traffic on each link

for increased reliability. The second method uses the two high-speed, 12-in-1, 8-Mbps serial ports. These ports support all the Cisco serial

routing protocols for flexibility in connecting to remote networks. The third method uses trunk feature cards as possible backhaul

interfaces.

Environmental Monitoring

Thermal sensors monitor the inlet and outlet temperatures and temperature rise across each card. If the operating temperature of the system

exceeds its maximum, the thermal sensors initiate a shutdown of the feature cards, starting with the DSP cards and finishing with the trunk

cards. The trunk cards are shut down last so the system has a chance to recover before putting the trunks into alarm status at the central

office. If the system continues to exceed its maximum operating temperature, the thermal sensors initiate a shutdown, preventing damage

to the unit or its surrounding environment from excess heat.

The Cisco AS5400XM Universal Gateway offers the option of a redundant AC or DC power supply. The redundant power system

comprises a fully redundant switching power supply with two AC (or two DC) inputs to the main power modules. Each input and output

is 100-percent fully redundant, with dual fans for added reliability and mean time between failure (MTBF) of more than 200,000 hours.

Both the AC redundant and DC redundant power supplies have internal protection features: overcurrent, overvoltage, and thermal

shutdown. Internal sensors to the power supplies monitor all operational parameters, and alarm status is provided to the system.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 21 22

Pas de commentaire

Cisco AS5400XM Manuel d'utilisateur Page 12