Cisco 1004-CH - 1004 Enet/ISDN/Bri Rter Specifications download pdf (Page 45)

System Specifications 3-45

Processor Functions

The IGX 8400 series has a processor card group that controls communication between the cards in

the node and the system bus. This card group also controls communication to other nodes in the

network, and performs system timing, network control, and status reporting functions.

Processor Card Group

The processor card group consists of the network processor module, system clock module, and alarm

relay module.

• Network processor module (NPM)

The NPM is a microprocessor-based system controller that contains the software for controlling,

conﬁguring, and monitoring the IGX 8400 switch.

• System clock module

The system clock module provides a centralized clock generation function for the IGX 8400

series switch. Each IGX 8400 must have a system clock module; a single system clock module

can support redundant NPMs.

• Alarm relay module (ARM)

The ARM includes visual alarm indication, a set of relay outputs, and an alarm history indication.

ATM Services

The IGX 8400 series provides ATM services at broadband speeds. IGX 8400 ATM interfaces

support LAN connections across the wide area and seamlessly operate across the Cisco product

families, while providing high performance through user fairness, high throughput, and low

discards.

Frame Relay Services

Standards-compliant Frame Relay services from IGX 8400 switches achieve high-throughput,

low-delay, and low-discard connectivity for LAN interconnect and legacy FRAD trafﬁc. Port speed

options range from 56 kbps to 2.048 Mbps. A Port Concentrator Shelf (PCS) can be used in

conjunction with the IGX 8400 switch for higher-density, lower-speed Frame Relay ports. Standard

interfaces include V.35, S.12, and channelized T1 and E1 for up to 31 logical ports per physical port.

Port Concentrator Shelf

The IGX 8400 series Port Concentrator Shelf dramatically increases the Frame Relay port capacity

and speed range of the IGX 8400 series switch. A fully loaded PCS expands the capacity of each

IGX Frame Relay card to support 11, 22, 33, or 44 ports with a wide range of sub-T1/E1 port speeds.

The modular PCS hardware lets you tailor each IGX 8400 series switch for speciﬁc applications.

Modules are available with V.24/V.28, V.11, or V.35 DCE and/or DTE interfaces. For applications

requiring multiple types of interfaces, interface daughter boards can be mixed and matched on a

per-interface basis. You can insert up to four PCS modules into a PCS shelf. Modules can be

hot-swapped without affecting service to other ports on the shelf.

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Cisco 1004-CH - 1004 Enet/ISDN/Bri Rter Specifications Page 45