Telecommunication service e.g mobile broadband internet service is carried out by many transmission media such as optical fiber, satellite and radio microwave (E1 transmission). They will be utilized based on purpose and location where they will be installed. Almost the entire of telecommunication services are using E1 transmission including wireless or mobile broadband internet service. The reason is because they can provide the lowest rate speed level (1E1 equal to 2 Mbps) more over they can be divided into several time slot (1 time slot equal to 64 kbps)

Wireless internet service needs E1 transmission to carry out internet traffic from subscribers located at many areas. Usually Telecommunication Company has only one termination point to internet gateway and located ad head quarter. With this scenario, their subscribers located at long distance at many areas must be terminated using E1 transmission. More areas they need to connect then more E1 capacity they need. This is potential point to have a problem on wireless or mobile broadband internet service. While this is happening, the things need to be investigated and fix it are;

1. How many E1 capacity to cover the entire of areas

Traffic which carried out by E1 transmission of wireless or mobile broadband internet service is internet traffic which can not be predicted how much its capacity. The capacity of E1 transmission to carry our wireless internet service will increase while the internet traffic from many areas increases. While E1 transmission problem is coming, we need to identify how many E1 transmissions are going down.

2. Which termination point is having a problem

Usually Telecommunication Company has several E1 termination points. Some of them are lease to another provider and some are their own network infrastructures.

3. What kind of connections of this E1

Many technologies can be utilized to terminate the E1 transmission such Multi Protocol Label Switching (MPLS) and Point to Point (P2P) Connection

4. Network element which connected this E1 transmission

Before internet traffic reach the internet gateway E1 transmission will be converted to IP based packet and to do this effort, telecommunication company need to add E1 converter to IP base.

5. Back up E1 transmission to reroute the traffic

The availability of back up E1 transmission is very critical while primary E1 transmission goes down. This is to ensure that wireless internet service is running for 24 hours. While E1 transmission problem is coming usually there will be long outage of service if they do not have back up E1 transmission

E1 transmission problem could be at any point of above. It could be on the E1 transmission it self was go down or on the network element where this E1 terminated are going down or on the technology where E1 transmission was connected. The critical point that must be provided by telecommunication company to ensure that wireless or mobile broadband internet service run well is provide a redundancy network in case the primary link goes down