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providers. The Cisco AS5850 Universal Gateway facilitates interconnection between telephony ASPs and VoIP network-infrastructure
providers to bring complete solutions to end users.
SS7 Interconnect
Using the Cisco PGW 2200 Softswitch or Cisco BTS 10200 Softswitch (or a third-party softswitch), service providers can interconnect
their data and VoIP network with the PSTN through SS7 or C7 links. In many countries, carriers must interconnect through SS7 to qualify
for reciprocal compensation. The Cisco PGW 2200 and Cisco AS5850 Universal Gateway provide the interface needed to interconnect
using Q.931 over IP or MGCP, allowing service providers to enter markets they otherwise would not have access to because of signaling
requirements. SS7 trunks are more efficient than CAS or PRI trunks, and they typically cost less than PRI trunks. With SS7, call setup
time decreases, increasing the amount of billable traffic carried by the network.
Service-Level Management
The Cisco AS5850 Universal Gateway supports Cisco RADIUS-based RPM, enabling service providers to offer guaranteed port
availability across shared infrastructure, thereby helping them guarantee service levels to their customers. In addition, Cisco RPM offers
the ability to ensure “fairness” across multiple customers for the same shared ports when there is no service-level guarantee, and it also
facilitates Cisco AS5850 support of DoVBS.
Resource pooling can be configured on a per-gateway basis. Customer profiles stored on the Cisco AS5850 determine how resources are
allocated to each of the wholesale service provider’s customers. Each customer is identified based on a list of dialed numbers from DNIS.
The Cisco AS5850 can also provide RPM services for a gateway or networkwide scope through third-party RADIUS servers.
Table 2 outlines some of the major benefits provided by the Cisco AS5850.
Table 2. Features and Benefits of the Cisco AS5850 Universal Gateway
Feature Benefit
High scalability
●
Provides at least 2688 ports in a 14-RU chassis
●
Offers high density combined with a single administrative domain
●
Offers growth potential that protects investment without incurring large initial costs
Redundant high-speed processors
●
Helps enable the Cisco AS5850 Universal Gateway to easily sustain at least 2688
concurrent modem, voice, or fax sessions
Scalable chassis with Multilink PPP (MLPPP) and
Stack Group Bidding Protocol (SGBP) capable of
carrying increased density and higher-speed traffic
●
Allows customers to start small and stack additional servers as required, while still
being able to dial into one telco hunt group
Hot-swappable cards and power supplies
●
Provides redundant power supplies and power feeds
●
Provides redundant DSPs and ERSCs
●
Provides thermal, power management, and redundant fans
●
Offers DSP resource recovery feature
●
Improves network and service availability, reducing time and money lost because of
outages
Application-specific support
●
Supports AOL traffic
●
Provides capability to carry special types of traffic for wholesale dial applications
WAN optimization
●
Includes:
Routing filters
Snapshot routing
Dial-on-demand routing (DDR)
●
Helps customers reduce WAN costs, the single largest cost of internetwork operation
Security management
●
Includes:
RADIUS
TACACS+
Access lists
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