Cisco AS5400XM Manual do Utilizador descarregar pdf (Página 9)

Softswitch Interoperability

Softswitch products that support SIP, H.323, or MGCP can be used with the Cisco AS5400XM Universal Gateway to support advanced

applications for broadband services. The Cisco BTS 10200 Softswitch and the Cisco PGW 2200 Softswitch are two of the many softswitch

products that interoperate with the Cisco AS5400XM Universal Gateway.

SS7 Interconnect

Using the Cisco PGW 2200 PSTN Signaling Gateway (or a third-party SS7 gateway) and the Cisco AS5400XM Universal Gateway

with integrated SLT functions, service providers can interconnect their data and VoIP networks with the PSTN through SS7 links. In

many countries carriers must interconnect through SS7 to qualify for reciprocal compensation.

The Cisco PGW 2200 PSTN Signaling Gateway and Cisco AS5400XM Universal Gateway provide the interface needed for SS7

interconnect using ISDN User Adaptation Layer (IUA) with Stream Control Transmission Protocol (SCTP) as the call signaling IP

transport mechanism, allowing service providers to enter markets previously unavailable to them because of signaling requirements.

SS7 trunks are more efficient than CAS trunks, and they typically cost less than Primary Rate Interface (PRI) trunks. With SS7, call

setup time decreases, increasing the amount of billable traffic carried by the network.

Integrated SLT

The Cisco AS5400XM Universal Gateway trunk cards also have serial interfaces for integrated SLT functions. With integrated SLT, the

Cisco AS5400XM Universal Gateway provides distributed Message Transfer Part (MTP) SS7 signaling functions directly on the gateway.

The integrated SLT backhauls upper-layer SS7 protocols across an IP network using Cisco Reliable UDP (RUDP) or SCTP, terminating

the MTP1 and MTP2 layers of the SS7 protocol stack. Integrated SLT support is available through a software upgrade—no new hardware

is required. MTP3 with ISUP backhaul is included. Pricing is on a per-platform basis.

TDM Switching

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

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

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SS7-to-PRI grooming

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Local-number-portability (LNP) support in Europe

●

Automatic number identification (ANI) or Digital Number Identification Service (DNIS) manipulation

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Meeting special provisionary requirements for test calls (for example, 911 call handling)

This feature typically does not require any DSP resource and hence has no effect on the voice, fax, or data-handling capability of the

platform. TDM switching plus network-side ISDN functions provide a means of grooming incoming traffic and passing selected calls to

external devices, such as private branch exchanges (PBXs), test sets, VoIP gateways, or access servers. The Cisco AS5400XM Universal

Gateway can switch calls between SS7, PRI, and CAS trunks. TDM switching of CAS calls requires DSP resources.

The Cisco AS5400XM Universal Gateway TDM backplane supports CT3-to-CT3 TDM switching.

Remote-Access Capabilities

While still maintaining its capabilities as a best-of-class voice gateway, the Cisco AS5400XM Universal Gateway takes advantage of the

full-feature richness and strong routing capabilities of Cisco IOS Software. It can be deployed in various architectures, from multiprotocol

corporate networks (IP, IPX, AppleTalk, and NetBEUI, for example) to service provider IP networks. In addition, the Cisco AS5400XM

fully supports the specialized needs of AOL, MSN, and other content-oriented dialup services through PPP, Layer 2 Tunneling Protocol

(L2TP), or TCP Clear connections.

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Cisco AS5400XM Manual do Utilizador Página 9