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    Introducing the SRX240 Services Gateway with Integrated Convergence Services

    This topic includes following sections:

    Features and Functions

    The availability of hardware and software for voice and data transmission on the same device is called integrated convergence services.

    The SRX240 Services Gateway with Integrated Convergence Services implements a media gateway and a survivable call server (SRX Series SCS). The SRX240 Services Gateway with Integrated Convergence Services integrates voice and data capabilities to connect SIP phones and legacy analog phone, fax, PBX devices in a local site to SIP trunks or PSTN service providers. These capabilities enable you to leverage IP infrastructure for both voice and data needs.

    The SRX240 Services Gateway with Integrated Convergence Services also offers the following additional features:

    • Voice mail forwarding and retrieval to and from a centralized voice mail system through the PSTN
    • Digit manipulation for remapping digits
    • Caller ID support for detection and transmission of caller information (for USA standards)
    • Call waiting for SIP phones in which the user is alerted about a pending, incoming call
    • Call hold and resume in which SIP calls may be placed on hold and resumed by the SIP phone user
    • Local auto attendant with a standard workflow, allowing the caller to enter an extension number to reach the call destination

    Basic Functions

    The SRX240 Services Gateway with Integrated Convergence Services performs the following basic functions:

    • Connects local legacy analog phones, fax machines, and PBX devices to VoIP networks so these devices can make calls using VoIP to other SIP phones or the PSTN, and vice versa.
    • Assumes the call routing role as a survivable call server for local SIP or analog phones, in the event of loss of WAN connection
    • Supports emergency calling (E911) by providing the mechanism for detecting emergency calls from local VoIP phones and passes these calls to the PSTN when detected
    • Provides lifeline support in the event of power loss by connecting a port that has an analog phone to a port that is connected to the PSTN
    • Provides power failover support for one analog phone and PSTN FXO port

    Common Deployment Scenarios

    The SRX240 Services Gateway with Integrated Convergence Services is deployed in the following environments:

    • Enterprises that deploy VoIP in their headquarters and want to enable VoIP functionality for their branch offices
    • Enterprises that use hosted VoIP services from service providers (SPs) in order to enable VoIP functionality for their branch offices
    • Branch sites that are currently using a local key system or PBX and that want to utilize SIP trunking services

    Published: 2010-10-19