Cisco Systems AS5850 User Manual 2

CHA PTER

1

Cisco AS5850 Product Overview

The Cisco AS5850 is a high-density, ISDN and modem WAN aggregation system that provides both
digital and analog call termination. It is intended to be used in service provider dial point-of-presence
(POP) or centralized enterprise dial environments.

The gateway components include hybrid trunk and port-handling cards (both functions are handled by
different components in the same slot), dedicated port-handling cards, dedicated trunk cards, route
switch controllers, power entry modules, and a blower unit to cool the chassis. An optional 2400W AC
power shelf is also available. The gateway is designed with environmental monitoring and reporting
functions to help maintain normal system operation and resolve adverse environmental conditions prior
to loss of operation. If conditions reach critical thresholds, the system shuts down to avoid equipment
damage from excessive heat or electrical current.

Downloadable software and microcode allow you to load new software images into Flash memory
remotely, without having to physically access the universal gateway, for fast and reliable upgrades.

This chapter provides physical and functional overviews to familiarize you with your new
Cisco AS5850. The chapter also contains physical descriptions of system hardware and major
components and functional descriptions of component features.

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Note Descriptions and examples of software commands appear in this document only when they are

necessary for installing the system hardware. For software configuration information, refer to the
Cisco AS5850 Universal Gateway Commissioning Guidelines that shipped with your system, or the
Cisco AS5850 Universal Gateway Operation, Administration, Maintenance, and Provisioning
Guide. These documents are available on Cisco.com (http://www.cisco.com), by selecting:

Products and Services > Universal Gateways > Cisco AS5800 Universal Gateways

This chapter contains the following sections:

• If You Already Have a Cisco AS5800, page 1-2

• System Components, page 1-2

• Functional Overview, page 1-4

• Cisco AS5850 Chassis, page 1-9

• Field-Replaceable Units, page 1-13

• Split Backplane, page 1-11

• Power Requirements, page 1-28

• Online Insertion and Removal, page 1-29

Cisco AS5850 Universal Gateway Hardware Installation Guide

1-1

If You Already Have a Cisco AS5800

If You Already Have a Cisco AS5800

If you already have a Cisco AS5800, the Cisco AS5850 should be easy to adjust to. The following major
differences should be noted:

• The cooling module is 1 RU shorter.

• The Dial Shelf Controller (DSC) and Cisco 7206 router shelf were replaced with a route switch

controller (RSC) card, which goes in slots 6 and 7, not 12 and 13 (as with the DSC).

• There is a new 2400-watt power shelf. This power module can use three 120V 15A connections or

three 240V 10A connections, depending on what is available at your site.

• Because the chassis is shorter, and a separate router shelf (or two) are no longer needed, three

Cisco AS5850 gateways can fit in a standard rack, when DC-powered.

• The separate power entry module (PEM) and power filter have been integrated into a single unit

(PEMF).

• Trunk cards can be used in any feature card slot.

• All modems are universal ports and support voice, data, or fax connections. For details about

universal ports, refer to the Cisco AS5850 Universal Gateway Card Guide, and the Cisco AS5850
Operations, Administration, Maintenance, and Provisioning Guide (available online at the

following URL:

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_serv/as5850/sw_conf/5850oamp/
index.htm.)

Chapter 1 Cisco AS5850 Product Overview

• Command syntax has shifted slightly. Because you no longer need to distinguish the Cisco 5814 dial

shelf from the Cisco 7206 router shelf, commands using the shelf/slot/port syntax are shortened to
slot/port. The shelf abstraction is no longer needed.

System Components

The following sections in this chapter describe the core system components:

• Cisco AS5850 Chassis, page 1-9

• Field-Replaceable Units

–

For information about the feature cards used in the Cisco AS5850, refer to the Cisco AS5850
Universal Gateway Card Guide that shipped with your system. For information about other
FRUs, review the rest of this chapter, or for detailed specification tables, refer to Appendix A,
“Cisco AS5850 Specifications”, page 1-14

–

Route Switch Controller Card, page 1-14

–

DC-Input Power Entry Module, page 1-23

• Power Requirements, page 1-28

The Cisco AS5850 is designed to be rack-mounted. A rack-mount kit is included with each
Cisco AS5850. Each rack-mount kit provides the hardware needed to mount the chassis in a standard,
19-inch equipment rack or standard telco rack. If you plan to use a 23-inch equipment rack, you must
provide your own brackets or shelves to accommodate the Cisco AS5850 and optional AC power shelf.
For clearance requirements and rack-mount installation considerations, refer to the section
“Site Requirements” in Chapter 2, “Preparing for Installation.”

Figure 1-1 shows a front view of a Cisco AS5850 with the optional 2400W power shelf, and Figure 1-2

shows a rear view.

1-2

Cisco AS5850 Universal Gateway Hardware Installation Guide

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Chapter 1 Cisco AS5850 Product Overview

Figure 1-1 Cisco AS5850 with 2400W AC-Input Power Shelf—Front View

Cooling module

Captive screws

14-slot card cage

(Line, port, and

RSC cards installed)

System Components

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2400W AC-input power shelf (optional)

Note Figure 1-1 shows a system with two RSCs and a split backplane, and both sides supporting T3

connections. This is shown to illustrate full configurations on a split backplane.

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Cisco AS5850 Universal Gateway Hardware Installation Guide

1-3

Functional Overview

Figure 1-2 Cisco AS5850 with AC-Input Power Shelf—Rear View

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Chapter 1 Cisco AS5850 Product Overview

AC power supply

monitor cables

Ground cable

2400W AC-input

power shelf

Functional Overview

The Cisco AS5850 supports high-density dial aggregation and integrates with the Cisco AS5350 and
Cisco AS5400 universal gateways for scaling your service provider network.

The Cisco AS5850 universal gateway also supports high availability of service through online insertion
and removal (OIR) capabilities and redundant power modules that are hot swappable. All active
components within the chassis support OIR, which allows components to be removed or replaced while
the system is powered on. Feature cards can be busied-out through the software to avoid loss of calls.

The Cisco AS5850 is compatible with the Cisco Universal Gateway Manager (UGM) network
management software. For more on Cisco UGM, see the “Network Management” section on page 1-8.

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1-4

The Cisco AS5850 supports Channelized T1, E1,T3 PRI, and STM1 ingress interfaces that terminate
ISDN and modem calls at DS0 granularity. Digital calls are terminated onboard the trunk card, and
analog calls are sent to port handling resources on the same card or on other feature cards. As a result,

Cisco AS5850 Universal Gateway Hardware Installation Guide

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Chapter 1 Cisco AS5850 Product Overview

any DS0 can be mapped to any HDLC controller or universal port. You can install multiple ingress
interface cards of like types and configure the Cisco AS5850 for card or port level redundancy,
depending on your needs.

Trunk and port handling cards are tied together using several time-division multiplexing (TDM) buses
on the backplane. Each line card is also connected, through point-to-point packet buses, to a central
switch on the Route Switch Controller (RSC) cards. The RSC cards transmit and receive packetized data
across the IP network.

The Cisco AS5850 supports a split backplane configuration by using two RSC cards. In the classic-split
configuration, the system operates as two separate universal gateways with each RSC controlling its own
set of feature cards. In the handover-split mode, if one RSC fails, the other RSC takes control of the
failed RSC’s feature cards so their operation can continue. In the route processor redundancy (RPR+)
mode, one RSC acts as the active RSC that controls all the resources in the chassis. The other RSC is the
standby RSC and assumes control of the chassis if the active RSC fails. RPR+ enables a much faster
switchover than handover-split mode. For more information about the split backplane configuration,
refer to the “Split Backplane” section on page 1-11.

The RSC card also provides clock and power control to the feature cards. Each RSC card contains a block
of logic, referred to as the common logic, and system clocks. This block generates the backplane 4-MHz
and 8-KHz clocks used for interface timing and for the TDM bus data movement. The common logic can
use a variety of sources to generate the system timing, including a BITS input signal from the BNC
connector on the RSC front panel. The clock source can also be telco office timing units extracted from
the network ingress interfaces.

On the RSC card, only one common logic is active at any one time, which is identified by the CLK
(clock) LED on the RSC card front panel. The active common logic is user-selectable and is independent
from each RSC. This assures that if an RSC card needs replacing or if the slave RSC card becomes the
master, clocking remains stable. The selected common logic should not be changed during normal
operation unless related hardware failure is suspected or diagnosed.

Functional Overview

You can install and upgrade software remotely, without affecting current system operation. You can also
upload and download configuration files remotely, without affecting current system operation. Remote
access is enabled by use of simple network management protocol (SNMP), by a Telnet session to a
console port on the router shelf, through the World Wide Web (WWW) interface, or through use of the
optional network management software.

The Cisco AS5850 can dynamically adjust any port to support any user configuration. Individual users
can be authenticated as they connect to the system by use of one or more authentication servers using
RADIUS and TACACS+ authentication protocols. Primary and backup authentication servers can define
user authentication parameters using the user domain and the number called. User profile information
can also be configured to include time of day, number of simultaneous sessions, and number of
B-channels used.

When a remote user connects to the universal gateway using a modem or an ISDN line, the user is
authenticated and establishes a session. Dynamic address assignment from an authentication server or
static address assignment connects the user and has virtually no impact on service provider routing
tables.

A remote LAN user can connect to the universal gateway using an ISDN line or asynchronous serial
connection, be authenticated, and establish a session. In addition to dynamic or static address
assignment, this connection requires the traditional Cisco IOS software support for different routing
protocols on different ports simultaneously, with virtually no impact on service provider routing tables.

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Cisco AS5850 Universal Gateway Hardware Installation Guide

1-5

Functional Overview

Traffic Flow

Chapter 1 Cisco AS5850 Product Overview

A dial wholesale customer can connect to a Cisco AS5850, then tunnel PPP (Point-to-Point Protocol)
packet information to a retail service provider using dial Virtual Private Network (dial VPN).

For detailed system specification tables, refer to Appendix A, “Cisco AS5850 Specifications.”

Figure 1-3 shows inbound connection flow for the Cisco AS5850.

Figure 1-3 Inbound DS0 Traffic Flow

Backplane

Cisco AS5850

universal gateway

T1/E1 trunk card

2

T1/E1
CAT5

1

Modem
Twisted pair

universal port card

T3

T3
COAX

OC3/STM-1 trunk card

OC3/STM-1

SMF

universal port card

GigE egress RSC

Backbone
Network 1

(Gigabit Ethernet)

Backbone
Network 0

(Gigabit Ethernet)

72964

A typical user connection flows as follows:

1. The user PC connects to an attached or internal modem.

2. The modem call connects to a central office (circuit switched) and is multiplexed into a T1/E1, T3,

or STM1 trunk.

3. The T1, E1,T3, or STM1 interface is terminated, and individual serial DS0s are sent to port-handling

hardware and software. Universal ports may be located in the same physical slot, as part of a hybrid
trunk card, or in a universal port card (UPC). (See Figure 1-3.)

1-6

4. Universal ports interface with modem protocols and convert TDM data into Ethernet packets.

5. Ethernet packets are routed and send out through the Fast Ethernet or gigabit Ethernet egress

interfaces to a backbone network.

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Chapter 1 Cisco AS5850 Product Overview

Power Flow

Figure 1-4 shows how power is distributed to various universal gateway field-replaceable units.

Figure 1-4 Power Distribution

Functional Overview

-48 VDC 50A

-48 VDC

-48 VDC 50A

120/240 VAC 15A

trunk card

Backplane

PEMF 1

PS 1

universal port card

Cooling
module

PEMF 2

PS 2 PS 3

Cisco AS5850

universal gateway

GigE egress RSC

-48 VDC 50A

-48 VDC

-48 VDC 50A

2400W AC-input

power shelf

(optional)

120/240 VAC 15A

120/240 VAC 15A

72965

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Note VDC output of the 2400 W AC power shelf is set at -51 volts DC.

Cisco AS5850 Universal Gateway Hardware Installation Guide

1-7

Functional Overview

Network Management

The Cisco Universal Gateway Manager (Cisco UGM) configures and manages fault, performance, and
security of the Cisco AS5850. Cisco UGM is a UNIX-based solution that can be run from a Cisco
Element Management Framework (EMF) server, and also provides the following features:

• Fault—Device and port-specific alarm frequency and severity information. The fault management

GUI supports point-and-click alarm acknowledgement and clearing functions, and trap forwarding.

• Configuration—Configuration services for the managed devices and their components. As objects

are configured or modified, the Cisco UGM database is automatically updated to reflect the current
configuration of the network.

• Performance—Collects performance information from each managed device and its components.

This information allows you to monitor the network by viewing and graphing performance data
associated with an object.

• Security—Supports role-based access to its management functions. The user administrator defines

user groups and assigns users to these groups, and also supports control of administrative state
variables for Cisco UGM resources.

Figure 1-5 shows the flow of system management information for the Cisco AS5850.

Chapter 1 Cisco AS5850 Product Overview

Figure 1-5 System Management Information Flow

Network management software or terminal

RSCGigE or FE ports

Backplane

PEMF 1

Cooling
module

PEMF 2

Cisco AS5850

universal gateway

trunk card

universal port card

1-8

2400W AC-input power shelf

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Chapter 1 Cisco AS5850 Product Overview

Cisco AS5850 Chassis

The Cisco AS5850 contains 14 slots (numbered 0 through 13 on the backplane) and can support trunk
cards and universal port cards in slots 0 through 5 or 8 through 13. Slots 6 and 7 in the chassis are
dedicated slots for the RSCs. There are two versions of the RSC, RSC and ERSC. ERSC has a faster
CPU, more memory, and two Fast Ethernet ports. Metal guard pins on the backplane module prevent you
from installing any other type of card in these two slots. The modular chassis supports online insertion
and removal (OIR) and redundant power and includes environmental monitoring and feedback control.

Table 1-1 shows the possible trunk card configurations for RSC:

Table 1-1 Maximum Number of Trunk Cards for RSC

Cisco AS5850 Chassis

Total
Trunk
Cards Per

Chassis Trunk Type First RSC Second RSC

24T1 only 2 24T1 2 24T1 4 8 2304 2592

T3 only 2 T3 2 T3 4 6 2688 2808

24T1/T3 combination 2 24T1 2 T3 4 7 2496 2700

24T1/T3 combination 1 24T1,

1 T3

24T1/T3 combination 1 24T1,

1 T3

24T1/T3 combination 2 24T1 1 24T1,

24E1 only 2 24E1 2 24E1 4 8 2880 2592

STM1 only 1STM1 1 STM1 2 10 4032 3240

24E1/STM1
combination

Table 1-2 shows the possible trunk card configurations for ERSC:

Table 1-2 Maximum Number of Trunk Cards For ERSC

2 24E1 1 STM1 3 9 3456 2916

1 24T1,
1 T3

2 T3 4 7 2592 2916

1 T3

Chassis

4 8 2496 3024

4 8 2400 2808

Total
324-port
UPC

Total
DS0s
with
RSC

Total
Ports
with
RSC

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Non-Split Chassis Split Chassis

Total
Chassis
Trunk
Ty pe

24T1 5 7 2880 2268 2 4 1152 1296

T3 5 7 3360 3348 2 3 1344 1404

24E1 4 8 2880 2592 2 4 1440 1296

STM1 2 10 3780 3240 1 5 1890 1620

Trunk

Cards Per

Chassis

Total
324-port
UPC

Total
DS0s
with
ERSC

Cisco AS5850 Universal Gateway Hardware Installation Guide

Total
Ports
with
ERSC

Total
Trunk
Cards Per
Chassis

Total
324-port
UPC

Total
DS0s
with
ERSC

Total
Ports
with
ERSC

1-9