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IP-Centrex – First phase

IX78 ADSL SIP FW. CDR (MOS) QoS. Ingate SIParator. CDR (MOS) QoS. Servers. IP-Centrex – First phase. Max 2000 calls. QoS being so important for good quality and the MOS score giving a valuable assessment of the quality, some ITSPs standardise and always install an Ingate or an IX78 as CPE.

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IP-Centrex – First phase

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  1. IX78 ADSL SIP FW CDR (MOS)QoS Ingate SIParator CDR (MOS)QoS Servers IP-Centrex – First phase Max 2000 calls QoS being so important for good quality and the MOS score giving a valuable assessment of the quality, some ITSPs standardise and always install an Ingate or an IX78 as CPE. SIP Carrier 2 SIP Carrier 1 Avaya Environment PC Softphone Internet Simple NAT/FW PC Softphone Legacy Firewall The Ingate SBC Firewall, centrally located at the ITSP, will provide protection of the network, routing and interoperability with carriers and IP-PBX as well Far End NAT Traversal (FENT). Avaya Environment Some customers might have advanced firewalls. An Ingate SIParator will then be required for SIP-based communication to traverse the firewall. FENTCDR (MOS) Ingate SBC Firewall ITSP Avaya CM Billing / User db

  2. IX78 ADSL SIP FW CDR (MOS)QoS IP-Centrex – Next phase Max 3x2000 calls (in this example) SIP Carrier 1 SIP Carrier 2 Avaya Environment Avaya Environment Internet PC Softphone Simple NAT/FW PC Softphone Ingate SIParator Legacy Firewall CDR (MOS)QoS Servers DNS SRV load balancing As the number of customers grow, capacity requirement increases. A battery of Ingates can be built with load balancing between them achieved on basis of DNS SRV. Avaya CM CDR (MOS) ITSP Billing / User db Ingate SBC Firewall

  3. Reference Case • GCM - A Service Provider offering Hosted VoIP services, with Ingate and Avaya equipment

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