Network topology

The topology of the network is a dual star centered in Maadi and Ramsis (Core Nodes) with direct connections to the Internet Data Center (IDC) and Internet gateway connections. The backbone links use NXE3 to accommodate future traffic increase.

Following the core nodes are 10 distribution nodes, each dual-homed to core nodes and to their adjacent access nodes. At the bottom of the hierarchy are 48 access nodes. Those are homed to distribution nodes via NXE1.

Raya Telecom is following a hierarchical approach to build the network. The hierarchical approach satisfies 2 of our main interests. Scalability, by which the network expansion does not affect the traffic integrity And Smooth Troubleshooting, by following a hierarchical approach, network faults are easily identified and moreover, faults in a specific area should not affect stability in different areas.

The topology of the network is a dual star centered in Maadi and Ramsis (Core Nodes) with direct connections to the Internet Data Center and Internet gateway connections. The current backbone line speeds range from n*E1 connections, using Inverse Multiplexing over ATM (IMA) and E3 connections
(34 Mbps).

Raya Telecom network is designed to meet the requirements of highest availability. This is achieved in 2 practices. Per Box Redundancy, all devices contributing in Raya Telecom network (e.g. ATM Switches, IP Routers, Dial-in Access Servers, DSL Access Multiplexes…etc.) are Carrier Class equipment, with fully redundant components (e.g. Processors, Power Supplies, Backplane, etc…). Topology Redundancy, the network topology provides "no single point of failure", i.e. no single link failure can result in node isolation.

In order to maintain a minimum network delay, Raya Telecom network was following Telecom Egypt different SDH Rings topology. By doing this, traffic is guaranteed to traverse the minimum number of nodes on both our private ATM network as well as the underlying SDH network.

We co-work with different bandwidth service providers to interconnect our network to the Internet. We currently have diverse links to different providers, with plans to upgrade these capacities to more than 155 Mbps over a 2-year plan.