I need to spec out a voip gateway, any help would be appreciated
1) Expected approx 20 concurrent connections
2) I want to use a Cisco router
3) what type of network module do I need?
4) Are the seperate calls broken out on the card or do I need something else?
I am unclear of the interface between an IP based system and the PSTN, any info would help
harbor235 ;}
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hmm, I need to interface to the PSTN for VOIP to non-VOIP calls via a VOIP gateway,
I expect a certain amount of those calls to the PSTN, I need a circuit (voice T-1) so I need an appropriate card for that, correct? I also am unclear if the sperate 64K channels are broken out in the card or via some other gear,
How are they not related?
harbor235 ;}
Could you explain in more detail what exactly you need. Do you already have an IP central system ? You just need to connect PSTN phones to it ? Or do you need the central system (please provide details about it, is it a PC box ? What is it based on, does it support SIP ?) to accept calls from PSTN lines ?
For example, if you have an IP central system and want to be able to use analogue phones on it, you need an ATA (that's an interface that can connect your telephone to IP). But you have given me too little to work on :)
yes
you need to have pvdm voice modules. ebay number 220499069860
http://cgi.ebay.co.uk/Cisc
The picture shows the pvdm modules on the left the T! on the right.
This is how to configure the voice wic.
http://www.cisco.com/en/US
Greg
Business Accounts
Answer for Membership
by: lucius_thePosted on 2009-10-22 at 12:23:53ID: 25637972
You ask a lot of quick (and not neccesarily related) questions on large topics.
My suggestion is take a look at asterisk distributions, like Elastix (http://www.elastix.org) and Trixbox (http://www.trixbox.org) for free ideas on IP telephony. There are several cards you can use to connect PSTN or ISDN or whatever you need to your IP telephone box (check http://www.digium.com for professional solutions). Grandstream (www.grandstream.com) provides good adapters and central boxes too.