24 Jul
2003
24 Jul
'03
5:04 p.m.
FXO is Foreign Exchange Office, or the telephone company.
FXS is Foreign Exchange (Something?), the actual telephone device.
If you want to plug in a phone, you must use FXS.
If you want to create a PSTN gateway, you must use FXO.
We have experimented with several FXO cisco devices.
None are too expensive. The Cisco 17xx series is a good
device that accepts VWICS that can be FXO or FXS.
The Cisco 26xx or 36xx with a NM-HDV (?) card accepts
VWICS. I've used the POTS based VWICS and the ISDN based
ones. ISDN is better.
---greg
-----Original Message-----
From: serusers-bounces(a)lists.iptel.org
[mailto:serusers-bounces@lists.iptel.org] On Behalf Of Jiri Kuthan
Sent: Thursday, July 24, 2003 1:17 AM
To: Rich Adamson; serusers(a)lists.iptel.org
Subject: low-density PSTN gateway (was Re: [Serusers] Firewall and NAT
At 02:23 PM 7/23/2003, Rich Adamson wrote:
Think the FXS is a Foreign Exchange interface
intended to tie
a ser-accessible gateway to a telephone/pbx line (not to a
telephone instrument).
I always thought that was FXO but I periodically confuse these
two abbreviations. Anyway, if folks want to have a low-cost
analog-line gateway, the cheapest I'm aware of are ~1000+ with
four analog ports. That's audiocodes and allied telesyn -- I never
tested them though and my hand-waving guess is that these
products still need to mature.
If anyone is aware of an affordable PSTN gateway, let me know.
-jiri
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