Hello,

I want to create a voip system for the basis of mail box set up and onward calling with billing abilities.
The service is based on a mail box system where a user dials a telephone number followed by a mailbox number, he will then hear a message based on the mailbox set up. at the end of the message, the caller may dial a key and be transferred to the mailbox owner. the set up of accounts should be via a web front end and be based on a menu system. Our customers are clients of ours who register via a web portal, the callers to the system are customers of our client.

Our client will apply via the web portal and agree to a monthly fee, one accepted based on payment acceptance, the system must do billing on a monthly basis via paypay. the price per month allows a number of mail boxes . so £1 per month per mail box purchased in bundles of £10. each mail box will be associated with an incoming dial in number, so each dial in number can have many accumulative mailboxes. each client of ours will have a user name and password , in this area, they will be able to set up mailboxes based on parameters, all set up data must go to a my sequel database. we as the administrator will set up the fields, all mailbox voice messages will be set up via a dial in of the associated mailbox dial in number. all information must also be able to be played via a website. so, in summery, client buys 10 mailboxes, he then sets the mailboxes up by initially the internet . based on parameters he chooses, then he dials into the mail box and is allowed immediate access to leave information based on his CLI recognised by the account set up. if a caller dials in to the mailbox, he will hear the message, if he chooses to dial the key for more information, the call is diverted to the set up client number and the client is billed by the system for the call.


You are required to utilise:

-A good SIP proxy to take care NAT bursting and media RTP issues (OpenSips?Kamailio?Freeswitch? You need to select which one and justify the reason behind.)

billing engine for monthly fees and onward calling
Our clients should be able to select a follow-me number that will be billed according to their active tariff. (If the forward is to a voip (SIP) number then there's no charge.

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I will provide you with access to the two servers so you can perform the installation and testing.
You will be required to demonstrate to me the load balancing abilities of the setup. For example, when Telephony Server 1 is full of calls then the proxy sends the calls to the second Telephony server (the 2nd telephony server will also be provided for this test). The tests should be performed with appropriate testing software provided by you.


This is a telephony project for a small community and it should not be regarded as a large project. Your quotation must take this into consideration.
If (and only if) the project turns out successful financially, then further investment will be done and hence you will be doing the further development!

If you have done such a thing before then you'll know that most of your time will be spent on doing the voicemail/follow-me/ voice to email integration

If you have any questions please let me know.
Please do not bid if you have never done this before. You will be wasting both my as well as your time and there is no need for this!
Please also note that the project is advertised elsewhere as well.


Thank you.