I need to build a UC500 based system with a lot (almost 20) of analog ports for physical FAX machines. It seems like the most I can do on the box itself is 4 FXS ports therefore I am looking at ATA devices. I have several questions concerning this:
1) Which impedance version for use on North American FAX machines
2) I think I want to go H.323 to save on licenses. Will this work for FAXes and how hard is this to do?
The VG224 looks like it will do the job but it is very expensive! Comparing that to an ATA186 it looks like you pay about $200 per port with the VG but only about $70 per port on the ATA186. I guess one reason for this is that it is easier to manage 1 VG224 that 12 ATA186's but are there any other reasons to justify the high cost per port?
1) The ATAs are not going to be supported as long as the VG224
2) Managing one VG224 is much easier than 12 ATAs
3) The VG224 supports SIP/SCCP/H323/MGCP just like any other gateway
4) VG224 also supports things like IPSEC, NAT, and routing protocols
5) It is much easier to configure and troubleshoot, as it doesn't have a custom interface
6) It officially supports modems and T38 which the ATA doesn't
7) Various other features like syslogging, EEM scripts, flash, IOS upgrades, IOS features, etc.
There are quite a bit of other things. The ATAs can be a pain since they are more or less their own device. The VG224 is just a FXS concentrated gateway so you can do all of the same commands on it.
You may also want to check out the price/port for the VG204/VG202, which is a similar device to the VG224. You can also look towards a legacy device like the VG248 which should also be able to register to the UC520.
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