Cisco AS5850 Manual do Utilizador descarregar pdf (Página 9)

Fax Features

Fax transmission over an IP infrastructure is an important and growing service opportunity, especially in international markets where fax

represents a large percentage of network traffic. The Cisco AS5850 Universal Gateway supports the standards-based T.38 Real-Time Fax

Relay, allowing greater interoperability between networks. The fax-detection capabilities of the Cisco AS5850 allow service providers

to offer a single E.164 number for subscriber voice and fax services. Half as many subscriber phone numbers are needed, resulting in

significant cost savings. The Cisco AS5850 also supports fax pass-through for VoIP environments that cannot support T.38 Real-Time

Fax Relay end to end.

TDM Switching

TDM switching is the ability to take an incoming call on a given DS-0 interface and send it out on a different DS-0 interface before the

call is answered by the gateway. This feature is used in such applications as:

●

SS7 or T1/E1 channel associated signaling (CAS) to PRI grooming

●

Meeting special provisionary requirements for test calls (for example, emergency-number call handling)

SS7 PRI grooming does not require any DSP resources after the connection is established and hence has no significant effect on the dial,

voice, and fax-handling capability of the platform. TDM switching plus network-side ISDN capability provides a means of grooming

incoming traffic and passing selected calls to external devices, such as PBXs, test sets, VoIP gateways, or access servers. The Cisco

AS5850 Universal Gateway can switch calls between SS7, PRI, and CAS trunks.

Manageability

The Cisco AS5850 Universal Gateway works with a wide range of management tools designed to reduce operational costs.

The console-management features include a comprehensive set of debugging commands that can be enabled on a specific calling line

ID (CLID), automatic number identification (ANI), called number (Digital Number Information Service [DNIS]), user, or interface to

immediately isolate only the relevant debugging output.

The Simple Network Management Protocol (SNMP) Version 2 and Version 3 management capability includes a rich call-tracking SNMP

MIB that provides highly detailed records for active and historical calls, with a configurable call-history buffer. Call records can also

be obtained through syslog or RADIUS as an alternative to polling through SNMP. Call records include connect rate, connect duration,

disconnect codes, end-to-end delay, and line statistics. This information allows service providers to debug problems for individual users.

Wholesale service providers can use this performance-management data to establish service-level agreements (SLAs) with their retail ISP

customers.

Network-Security Management

Cisco IOS Software network-security features allow authorized users dial access while preventing access to intruders. These features

include multilevel password protection, user authentication such as Password Authentication Protocol (PAP) and Challenge Handshake

Authentication Protocol (CHAP), access control lists (ACLs), IP address spoofing prevention and logging, and support of the industry-

standard authentication, authorization, and accounting (AAA) protocol RADIUS.

SS7 and Common Channel 7 Integration

Service providers around the world are deploying Cisco access servers with SS7 and Common Channel 7 (C7) interfaces. With SS7,

carriers realize immediate benefits of improved scaling, reduced network costs, and faster time to market. The Cisco SS7 solution,

implemented through the Cisco PGW 2200 Softswitch and Cisco BTS 10200 Softswitch, also guarantees investment protection in

existing Cisco access servers while providing a smooth migration to IP packet telephony.

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Cisco AS5850 Manual do Utilizador Página 9