1. Signaling Gateway A Signaling Gateway creates a bridge between the SS7 network and an IP network, under the control of the Gateway Controller. A Signaling Gateway causes a Softswitch to appear like an ordinary SS7 point code (SS7 node) in an SS7 network. The Signaling Gateway only handles SS7 signaling; a Media Gateway handles the voice circuits established by the SS7 signaling mechanism. SIGTRAN defines a suite of protocols and user adaptation layers for transporting signaling information over IP-based networks. If SigTran is used as the protocol between the Gateway Controller and the Signaling Gateway, then only MTP1, MTP2, and SigTran reside on the Signaling Gateway 1PTCL Training & Development

2.  A Signaling Gateway usually supports the following layers:  SCTP, which is responsible for reliable signaling transport, streaming, congestion avoidance and control  M3UA, which supports the transport of ISUP, SCCP, and TUP messages over IP  M2UA, which supports congestion control and the transport of MTP3 messages  IUA, which supports the Q.931/Q.921 interface  M2Peer, which supports the MTP3-to-MTP2 interface 2PTCL Training & Development Signaling Gateway….

3. Functional Requirements Signaling Gateway A Signaling Gateway must support the following functions: It must provide physical connectivity to the SS7 network via a TI/El or Tl/V.35 physical connection It must be able to transport SS7 information between Gateway Controller and Signaling Gateway via an IP network It must provide a transmission path for voice, video, and optionally data. (Data transmission may be supported within the Media Gateway.) Provide Highly Available SS7 operation for telecommunication services 3PTCL Training & Development

4. System Characteristics Signaling Gateway  A Signaling Gateway has the following system characteristics:  It is I/O intensive, but not very CPU intensive.  A maximum amount of memory should be available to hold state information, configuration information, the point code map, alternate routes, etc.  A disk storage is primarily used for logging; a small capacity may be adequate.  The Ethernet interface (to the IP network) may require dual redundancy. 4PTCL Training & Development

5. Signaling Gateway Characteristics  It may interface with the SS7 network by using a T1/E1/E1, with a minimum 2 D-channels, and a maximum 16 D-channels.  Performance and flexibility can be increased using a H.110 or H.100 bus.  High Availability is a requirement, multiple Signaling Gateways or signaling links are available. Redundancy is built into SS7 networks by design 5PTCL Training & Development

6. Convergence of SS7 and IP networks 6PTCL Training & Development

7. Call Control Functionality 7PTCL Training & Development

8. 8 SEGway X401 Signaling Gateway Ability to scale upto 1408 SS7 links with HSL, 1000SIGTRAN M2PA/M3UA/SUA associations. 14 slots available for I/O and application server blades thus unprecedented flexibility to interface with traditional SS7 and IP-SIGTRAN networks

9. PTCL Training & Development9 SEGway X301 Signaling Gateway Ability to scale upto 128 SS7 links Six payload slots available for low TDM and high speed (IP- SIGTRAN) this solution can be used to manage SS7 networks and connect with multiple interconnectivity partners.