Hello All,

We have been doing Asterisk and CME implementations recently but we almost always exlusively bring in analog lines and or PRI for PSTN access to our systems. I have known about providers providing SIP based lines and SIP trunks to end users for PSTN access. I am curious about the following:

- How practical is this? The idea of terminating pstn calls to across the Internet which is an unguarenteed medium concerns me. Even if our access to it is quazi stable T1 data type of access. Do any of you do systems where this is soley the method used for incoming calls from the pstn? If this is done are there things to look for in a SIP provider, as in their presence on the Internet latency ..etc?

- What are the major advantages? I know some places provide all you can eat plans which could be seen as a plus and some others provide really low rates. Are there others?

- Who are the major players?  How are these usually ordered and identified?

- Any general tips?

Thanks all!

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