[Serusers] Offline announcement + ENUM

Klaus Darilion klaus.mailinglists at pernau.at
Tue May 18 15:10:55 CEST 2004



Sylver B. wrote:
> Thank you very much Klaus !
>  
> Also, I have a trivial question regarding ENUM. In your configuration 
> you have ENUM entries for international dialing. But I wonder how SER 
> can be really linked to e164.arpa. 

ENUM will be used to check if the called party is available via SIP. 
This way, you can avoid the costs of sending the call into the PSTN network.

> Could you tell me if  the following scenario is good or not in a real 
> world deployment :
> - SER is linked to an isdn gateway (to maybe handle calls from PSTN 
> world) or calls are only initiated within the IP world?

You can use ser in combination with any SIP/PSTN gateway (asterisk, 
sems, cisco ...) and ENUM is usefull for outgoing and incoming calls:

- outgoing calls (user are registerd to your sip proxy and tries to call 
somebody with an E.164 number): usually, in this scenario ser would 
forward the call to the SIP/PSTN gateway, but if it find a sip-address 
due to ENUM lookups, it will contact the callee via SIP

-incoming calls:
   1. if you provide ENUM entries for your customers, they can be 
reached directly SIP based callers via IP. This will lower the 
utilization of you PSTN gateway :-)
   2. For incoming calls, you will configure your gateway just to 
forward all incoming calls to your SIP proxy. Then your SIP proxy uses 
ENUM, find the local user and forwards the call.

> - ENUM module perform queries to e164.arpa. 
yes
> - The SIP URI of the associated user is then retrieved
>
yes

> Now how can I handle my own ENUM DNS tree (Tier-2)? When do you think 
> Tier-2 providers will be linked to e164.arpa? How .tel domains and 
> ENUM will live together ?

This depends on the status of ENUM in your country. There are several 
ENUM trials and some companies already offers ENUM. If you are 
interested in this topic, read the following document:
http://enum.nic.at/documents/AETP/Permanent_Documents/Released%20Documents/0005-Austrian_ENUM_Trial_Introduction_to_ENUM_1_0.doc

regards
klaus

PS: please cc to the list

>  
> Thanks in advance,
> SB
>  
> 
> */Klaus Darilion <klaus.mailinglists at pernau.at>/* wrote:
> 
>     Of course you can do that!
> 
>     1. Configure the main proxy to send all INVITE requests for offline
>     users to the vm-proxy:
> 
>     if (!lookup("..")) {
>     if (does_uri_exist()) {
>     ..do here the forwarding..
> 
>     2. check if the reuqested user is in the voicemail group
>     -> voicemail
>     if(!vm("/tmp/am_fifo","voicemail")){
> 
>     else -> announce.
>     if(!vm("/tmp/am_fifo","announce")){
> 
>     regards,
>     klaus
> 
>     Sylver B. wrote:
>      >
>      > Hello !
>      >
>      > I have 2 instances of SER + 1x SEMS (ser, ser-vm and sems) . The
>      > first ser is for SIP routing and the second one, for SER/SEMS
>     routing logic.
>      >
>      > Do you have any clue of the way that I can play an announcement
>     saying
>      > for example "the user is offline" if :
>      > - voicemail is not activated for the user
>      > - and the user exist
>      >
>      > Thanks in advance,
>      > SB
>      >
>      > PS: my configuration is mainly based on :
>      > http://lists.iptel.org/pipermail/serusers/2004-February/005996.html
>      > (Thanks to Klaus Darilion )
>      >
>      >
>      > */Raphael Coeffic /* wrote:
>      >
>      > Hi Sylver,
>      >
>      > could you ask the guys at serusers at lists.iptel.org, as your problem is
>     more a
>      > matter of configuring ser as a sems problem?
>      >
>      > -Raphael.
>      > PS: this email has been cc-ed to serusers also...
>      >
>      > ----- Original Message -----
>      > From: "Sylver B."
>      > To:
>      > Sent: Monday, May 17, 2004 5:37 PM
>      > Subject: [Sems] Re: Multiple conference rooms + offline announcement
>      >
>      >
>      > >
>      > > Hello Raphael,
>      > >
>      > > Perfect it's working ! :)
>      > >
>      > > Also, do you have any clue of the way that I can play an
>     announcement
>      > > saying for example "the user is offline" if :
>      > > - voicemail is not activated for the user
>      > > - and the user exist
>      > >
>      > > Thanks in advance,
>      > > SB
>      > >
>      > > >Date: Sat, 15 May 2004 21:06:29 +0200
>      > > >From: "Raphael Coeffic"
>      > > >Subject: Re: [Sems] Multiple conference rooms
>      > > >To: , "Sylver B."
>      > > >Message-ID: <00d601c43aaf$bb2a83f0$6600a8c0 at rafland>
>      > > >Content-Type: text/plain; charset="iso-8859-1"
>      > > >
>      > > >Hello,
>      > > >
>      > > > > Do you know how I can create multiple conference rooms with
>      > SEMS ? is
>      > it
>      > > > > possible to dial, say for example , the conference server is
>      > reachable
>      > by
>      > > > > dialing 0001 , and if I dial 0001 - 0001 (+ 4 digits) , i can
>      > have a
>      > > > > "private" conference rooms. After that I can give the
>      > conference room
>      > > > > number 0001-0001 to all my friends.
>      > > >
>      > > >Sure it's possible! the conference plug-in creates a different
>      > conference
>      > > >room for each URI.
>      > > >Which means, that if you redirect every call with URI beginning
>      > with 0001
>      > to
>      > > >the con ference plug-in (in ser.cfg:
>      > vm("/tmp/ser_fifo","conference")),
>      > then
>      > > >0001-0001 will be a conference room whereby 0001-0002 will be
>      > another.
>      > > >
>      > > >-Raphael.
>      > >
>      > > _______________________________________________
>      > > Sems mailing list
>      > > sems at lists.iptel.org
>      > > http://lists.iptel.org/cgi-bin/mailman/listinfo/sems
>      >
>      >
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