Steven,
The external has some easy installation benefits, but there are a couple
of down sides.
The main one I can think of off the top of my head are CallerID, since
this data is transmitted between the first and second ring, the external
has to wait until the second ring before forwarding to your server if
you want inbound callerID, which means by the time you here two rings
your caller has heard at least 4 rings. This may or may not be important
to you.
The other is channel timing for conference/meetme rooms, by having a
zaptel device you get a proper working timer. Especially if you have
voip and pstn participants in the meetme room. Even by using a
software/OS timer you'll get drift, not sure I have this completely
right but I think it goes like this, pstn timing from telco is measured
in 1000's of a second, but the system clock being binary is actually
1/1024. Having the zaptel device with a true timing device will time in
1000's and keep the server in synch with the telco. Without the hardware
you'll drift the 24/1000 which isn't much and the ztdummy will try and
compensate, but over time and or many meetme participants delay will be
introduced to the conference call. Now if everyone is calling in via
voip, not an issue since all are the 1/1024.
Mike
Steven McCann wrote:
Hello,
I would like to know if anyone could tell me some of the pros and cons
from using a external FXO adapter (such as the Linksys spa400 or
Grandstream GXW-4104) compared to using an internal FXO adapter such
as a digium or other company's card. The price ranges seem to be the
same or maybe a bit cheaper for the external devices. The setup I am
looking into is for 2-3 FXO line system.
External seems to have some benefits such as easy installation, easier
redundancy (for having a separate server configured if a main one goes
down). Are there any drawbacks in terms of sound quality,
configuration or feature support?
Some setup options we would like to have are:
-the ability to register/display multiple lines from the IP phones
-the ability to answer a call from call waiting, or if there is a
cost-effective way to set something up with Bell that a second call to
a number could come to another incoming line and be answered by the IVR
Any information is greatly appreciated.
Regards,
Steven
------------------------------------------------------------------------
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.24/742 - Release Date: 01/04/2007
20:49
--
Mike Ashton
Quality Track Intl
Ph: 647-722-2092 x 251
Cell: 416-527-4995
Fax: 416-352-6043
QTI CONFIDENTIAL AND PROPRIETARY INFORMATION
The contents of this material are confidential and proprietary to Quality Track
International, Inc.
and may not be reproduced, disclosed, distributed or used without the express
permission of an authorized representative of QTI.
Use for any purpose or in any manner other than that expressly authorized is
prohibited.
If you have received this communication in error, please immediately delete it
and all copies, and promptly notify the sender.
begin:vcard
fn:Mike Ashton
n:Ashton;Mike
org:Quality Track Intl
adr:;;63 Kenpark Ave;Brmpton;ON;L6Z 3L4;Canada
email;internet:[EMAIL PROTECTED]
title:CTO
tel;work:905-840-4995
tel;cell:416-527-4995
x-mozilla-html:FALSE
url:http://www.QualityTrack.com
version:2.1
end:vcard
