My situation is this. We are currently subscribing to over 60 analog 4-wire leased lines to different remote sites from our central office. The analog leased lines are used to carry audio traffic from central office's controller to remote sites' analog 4-wire transmitter. Both the controller and transmitter are equipped with analog interface port for the 4-wire leased line.
We have been given 6 months to move away from the analog leased line by the service provider. We are in a dilemma now as all the options that we can think of are too costly.
I was having the idea of replacing the analog leased lines with POTS lines, assuming it can be done. This would be the most cost effective as I can get a low monthly fixed rate for the POTS line.
Does any have a suggestion how I can do this?
Any ideas are most welcome.
Using voip will be expensive as I have to replace the analog leased lines with digital 64kbps (at least) lines. Analog lines are about 3 times cheaper than a 64kbps line.
Do you think using FXO/FXS card will help? If I have a router with 2-port FXO/FXS card, can I connect one port to PSTN and another port to controller and have both ports loop internally, maybe using connection trunk/plar. At the remote side, I will also have a router with 2-port FXO/FXS card. One port to PSTN and another port to transmitter. Again, both ports are loop internally.
The problem with Malaysia's low-priced (about USD45/mth) Internet broadband is its not stable and based on best-effort (shared-based). We cannot afford to replace the analog leased lines with expensive dedicated Internet lines. It would make our businesss non viable.
About my idea. Do you think the setup below is possible?
Controller -- E/M 1 -- FXS/FXO 1 ---------PSTN --------- FXS/FXO 2 -- E/M 2 -- Transmitter
FXS/FXO 1 calls up to FXS/FXO 2 can gets connected.
E/M 1 (4-wire) is loop internally (maybe using Connection TRUNK/PLAR) to FXS/FXO 1.
E/M 2 (4-wire) is also loop internally to FXS/FXO 2.