24 Mar
2004
24 Mar
'04
2:47 p.m.
Hi,
I'd like to use official phone numbers inside my voip network (the
numbers are assigned to me and are routed to my Cisco-5300 gateway in
case of an incoming call from PSTN), and I don't want to use a prefix
when calling from voip to PSTN.
Now when I want to perform a call from the voip net, how can I decide
wether it's an internal voip call or should be routed to the PSTN gateway?
Would it be a proper solution to just lookup in the aliases- and
location-table, and, if not found there, just forward it to the PSTN
gateway? The PSTN gateway should then route it back to my SER if it's a
number assigned to me, and I'd get a loop, which should be detected by
the mf_process_maxfwd_header() function.
Sounds like a ugly hack, and I'm really not shure if this would work, so
how would be the standard solution for such a task? (beside using a PSTN
prefix)
Regards,
Andy
24 Mar
24 Mar
3:28 p.m.
I wrote:
Would it be a proper solution to just lookup in the
aliases- and
location-table, and, if not found there, just forward it to the PSTN
gateway? The PSTN gateway should then route it back to my SER if it's a
number assigned to me, and I'd get a loop, which should be detected by
the mf_process_maxfwd_header() function.
Sounds like a ugly hack, and I'm really not shure if this would work, so
how would be the standard solution for such a task? (beside using a PSTN
prefix)
Hmm... another idea: putting all of my users into a group "internal" and
process the lookup("location") based on the group:
if (is_user_in("To", "internal")) {
# this one goes to my voip net
...
}
else
{
if(is_user_in("From", "internal")) {
# internal users are allowed to go to GW
t_relay_to_tcp("GW-IP", "GW-Port"); # or something like that
break;
}
else {
# no relaying via my GW
... # (error processing)
}
}
What about this approach?
Andy
4:05 p.m.
Just the same thing idea as in my approach, but IMO a smarter workaround.
klaus
Andreas Granig wrote:
I wrote:
Would it be a proper solution to just lookup in
the aliases- and
location-table, and, if not found there, just forward it to the PSTN
gateway? The PSTN gateway should then route it back to my SER if it's
a number assigned to me, and I'd get a loop, which should be detected
by the mf_process_maxfwd_header() function.
Sounds like a ugly hack, and I'm really not shure if this would work,
so how would be the standard solution for such a task? (beside using a
PSTN prefix)
Hmm... another idea: putting all of my users into a group "internal" and
process the lookup("location") based on the group:
if (is_user_in("To", "internal")) {
# this one goes to my voip net
...
}
else
{
if(is_user_in("From", "internal")) {
# internal users are allowed to go to GW
t_relay_to_tcp("GW-IP", "GW-Port"); # or something like that
break;
}
else {
# no relaying via my GW
... # (error processing)
}
}
What about this approach?
Andy
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3:43 p.m.
Does your cients have random phone numbers or are they all in the same
block? IF you have a numer block, e.g. 321XXXX, just use
if (uri=~"^sip:321[0-9][0-9][0-9][0-9]")
lookup(location)
....
else
forward to PSTN
If the internal numbers are random, you can use e.g. a second location
table (let's call it location2). It will have the same structure as the
location (or alias) table and you have to enter every client, and using
its local account as contact (so lookups will not change the request-uri)
then the proxy could do:
if (lookup("location2")) {
user is a local user
if (lookup("location")) {
#user is online
t_relay()
} else {
sl_send_reply("404","offline");
}
else {
#no local client
t_relay_to_tcp("gateway-ip");
}
If someone knows an easier solution I'm pleased to hear it.
regards,
klaus
Andreas Granig wrote:
Hi,
I'd like to use official phone numbers inside my voip network (the
numbers are assigned to me and are routed to my Cisco-5300 gateway in
case of an incoming call from PSTN), and I don't want to use a prefix
when calling from voip to PSTN.
Now when I want to perform a call from the voip net, how can I decide
wether it's an internal voip call or should be routed to the PSTN gateway?
Would it be a proper solution to just lookup in the aliases- and
location-table, and, if not found there, just forward it to the PSTN
gateway? The PSTN gateway should then route it back to my SER if it's a
number assigned to me, and I'd get a loop, which should be detected by
the mf_process_maxfwd_header() function.
Sounds like a ugly hack, and I'm really not shure if this would work, so
how would be the standard solution for such a task? (beside using a PSTN
prefix)
Regards,
Andy
_______________________________________________
Serusers mailing list
serusers(a)lists.iptel.org
http://lists.iptel.org/mailman/listinfo/serusers
4:12 p.m.
Klaus Darilion wrote:
Does your cients have random phone numbers or are they
all in the same
block? IF you have a numer block, e.g. 321XXXX, just use
if (uri=~"^sip:321[0-9][0-9][0-9][0-9]")
lookup(location)
....
I have a coherent number block, but numbers are prefixed by different
area codes with different length, and they are also suffixed by numbers
with different length, so no chance here for simple number matching.
If the internal numbers are random, you can use e.g. a
second location
table (let's call it location2). It will have the same structure as the
location (or alias) table and you have to enter every client, and using
its local account as contact (so lookups will not change the request-uri)
Hmm, ok, this would be another possibility to think about, thanks.
On the other hand, the approch with group membership would be more
flexible, because I could restrict some users to internal calls only.
Andy
4:34 p.m.
I use:
if (!does_uri_exist()) {
"route to gw"
...
};
Tor.
Andreas Granig wrote:
Klaus Darilion wrote:
Does your cients have random phone numbers or are
they all in the same
block? IF you have a numer block, e.g. 321XXXX, just use
if (uri=~"^sip:321[0-9][0-9][0-9][0-9]")
lookup(location)
....
I have a coherent number block, but numbers are prefixed by different
area codes with different length, and they are also suffixed by numbers
with different length, so no chance here for simple number matching.
If the internal numbers are random, you can use
e.g. a second location
table (let's call it location2). It will have the same structure as
the location (or alias) table and you have to enter every client, and
using its local account as contact (so lookups will not change the
request-uri)
Hmm, ok, this would be another possibility to think about, thanks.
On the other hand, the approch with group membership would be more
flexible, because I could restrict some users to internal calls only.
Andy
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Serusers mailing list
serusers(a)lists.iptel.org
http://lists.iptel.org/mailman/listinfo/serusers
7552
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6 comments
3 participants
participants (3)
-
Andreas Granig -
Klaus Darilion -
Tor Setane