27 Aug
2007
27 Aug
'07
5:54 p.m.
Hello Fredrik,
Fredrik Lundmark wrote:
Hmm,
I find the dialog I initiated both amusing and (for me) very
informative. Being pretty new to these lists, I'm evaluating technology
to use for an ITSP setup and I'll welcome more comments and views as the
ones below - they help me understand "what to use for which purpose".
What my needs are:
1. Prepaid support - maybe I don't need a b2bua, could the dialogue
module be "call-aware" and be used to terminate calls upon
"end-of-credits"?
2. Filtering of Refer & Replace (RFCs 3515, 3891, 3892), replacing
them with Re-Inivtes - to support most UAs, at the same being
compliant with SIP trunks supporting SIPConnect
3. IVR capability - i.e. "regular IVR" (customized stuff) as well as
standard applications (voicemail, conference)
4. Queuing of calls
5. 3pcc - capability for handling calls from a operator's application
Anyone wanting to advise?
adding my general two cents to what already has been mentioned, I would
want to note that it also depends quite a lot on how big the setup is
you are doing, how deep you are in the technology, and how much you are
willing/able to implement and customize yourself.
If you only want to use SEMS as *user* without going at times into the
code, I can recommend it only for the basic applications (announcements,
pre-call announcements, voicemail, simple conference bridge) that come
with it. SEMS has been deployed as components serving these in large
setups at carriers, ITSPs and other sites alike for years showing quite
good stability and performance. For those applications I guess that you
are in total better off with SEMS than with asterisk.
While you have the core capabilities, there are no PBX-like applications
with SEMS to work as is out of the box. For those, and/or if you need
other channel types than SIP, you have asterisk (or freeswitch, for that
matter) with all its universe of applications and customizations.
As has been mentioned, if you want to use SEMS for more complex
applications and call-flows involving media, you will need to be able to
read the code and the examples along with the available docs, and I
think doing this, reading the tutorial and the standard modules' and
examples' source, gives you a quite good impression about the
capabilities and the style of implementing applications in SEMS. And
then, some people also reported that its not too hard or time-consuming
to get to the point where you are able to implement your custom
application (see e.g.
http://lists.iptel.org/pipermail/semsdev/2007-May/001456.html).
Regards
Stefan
BR///
Fredrik
--
Stefan Sayer
VoIP Services
stefan.sayer(a)iptego.de
www.iptego.de
iptego GmbH
Am Borsigturm 40
13507 Berlin
Germany
Amtsgericht Charlottenburg, HRB 101010
Geschaeftsfuehrer: Alexander Hoffmann