Mailing List Archive: voip rural setup

voip rural setup

Sep 17, 2003, 8:54 AM

Post #1 of 3 (1640 views)

dear sir;

Dear lists,

this is my first posting in the list and i hope that i get some suggestion.

I am planning to setup very low cost rural VOIP using VSAT and wiress loop ie with access point
in point to multipoint mode with IP phones at the CPE.

the problem iam facing is how do I limit just only 4 users or IP conversation/call at a time.

let me explain clearly...i have bandwidth through VSAT of about 34Kbps and so 4 users can have voice channels at 8 Kbps compression. for instance i have 15 users or subscribers with IP phones connected to wireless.if more users at a time request for IP call then voiceIP call would be degraded.now how do i control them.
could you pls kindly suggest me or help on this.

IPphone > Accesspoint > Router > VSAT <

can you suggest where i can make to limit only 4 users at a time.
i cant limit in the wireless loop as the AP allow all the IP call request
what kind of low end router or access product or VOIP products i can use to limit IP calls at anyone time
this setup is in remote rural areas. all these rural is connected to our NOC through VSAT
if a user picks IP phone he gets IVR from NOC through VSAT:

i would be glad if you could help me in this project.

regards
karthi

Re: voip rural setup [ In reply to ]

jared at puck

Sep 17, 2003, 12:16 PM

Post #2 of 3 (1583 views)

Permalink

On Wed, Sep 17, 2003 at 06:54:05PM +0300, Karthikeyan Arumugam wrote:
> dear sir;
>
> Dear lists,
>
> this is my first posting in the list and i hope that i get some suggestion.
>
> I am planning to setup very low cost rural VOIP using VSAT and wiress loop ie with access point
> in point to multipoint mode with IP phones at the CPE.
>
> the problem iam facing is how do I limit just only 4 users or IP conversation/call at a time.
>
> let me explain clearly...i have bandwidth through VSAT of about 34Kbps and so 4 users can have voice channels at 8 Kbps compression. for instance i have 15 users or subscribers with IP phones connected to wireless.if more users at a time request for IP call then voiceIP call would be degraded.now how do i control them.
> could you pls kindly suggest me or help on this.
>
> IPphone > Accesspoint > Router > VSAT <
>
> can you suggest where i can make to limit only 4 users at a time.
> i cant limit in the wireless loop as the AP allow all the IP call request
> what kind of low end router or access product or VOIP products i can use to limit IP calls at anyone time
> this setup is in remote rural areas. all these rural is connected to our NOC through VSAT
> if a user picks IP phone he gets IVR from NOC through VSAT:
>
> i would be glad if you could help me in this project.

What you probally want to do is do some congestion
managment. I'm not sure what sort of call manager/sip proxy/whatnot
you are using in this situation, but what you want to do
is track these users in a group of some sort and when the phone attempts
to do a call setup either provide a busy tone back or a congestion/fast busy
tone back to the user. If you signal back to the VoIP endpoint a
busy tone they will likely retry after a short period when
there are less people using the link.

I'm not familiar with VSAT (is this a satellite link? that's my
guess by the name) so can't provide much assistance with ideas
here.

- Jared

--
Jared Mauch | pgp key available via finger from jared@puck.nether.net
clue++; | http://puck.nether.net/~jared/ My statements are only mine.

Re: voip rural setup [ In reply to ]

wsisk at cisco

Sep 17, 2003, 7:28 PM

Post #3 of 3 (1594 views)

Permalink

Jared,

Not sure what protocol you're using to control the phones at the CPE.
If you're using callmanager+sccp(skinny) you can use the "locations"
feature to do your call admission control (CAC).

If you're running h323, you can use a gatekeeper.
For SIP, sorry no idea, just starting down that path.

/Wes

Jared Mauch wrote:
> On Wed, Sep 17, 2003 at 06:54:05PM +0300, Karthikeyan Arumugam wrote:
>
>>dear sir;
>>
>>Dear lists,
>>
>>this is my first posting in the list and i hope that i get some suggestion.
>>
>>I am planning to setup very low cost rural VOIP using VSAT and wiress loop ie with access point
>>in point to multipoint mode with IP phones at the CPE.
>>
>>the problem iam facing is how do I limit just only 4 users or IP conversation/call at a time.
>>
>>let me explain clearly...i have bandwidth through VSAT of about 34Kbps and so 4 users can have voice channels at 8 Kbps compression. for instance i have 15 users or subscribers with IP phones connected to wireless.if more users at a time request for IP call then voiceIP call would be degraded.now how do i control them.
>>could you pls kindly suggest me or help on this.
>>
>>IPphone > Accesspoint > Router > VSAT <
>>
>>can you suggest where i can make to limit only 4 users at a time.
>>i cant limit in the wireless loop as the AP allow all the IP call request
>>what kind of low end router or access product or VOIP products i can use to limit IP calls at anyone time
>>this setup is in remote rural areas. all these rural is connected to our NOC through VSAT
>>if a user picks IP phone he gets IVR from NOC through VSAT:
>>
>>i would be glad if you could help me in this project.
>
>
> What you probally want to do is do some congestion
> managment. I'm not sure what sort of call manager/sip proxy/whatnot
> you are using in this situation, but what you want to do
> is track these users in a group of some sort and when the phone attempts
> to do a call setup either provide a busy tone back or a congestion/fast busy
> tone back to the user. If you signal back to the VoIP endpoint a
> busy tone they will likely retry after a short period when
> there are less people using the link.
>
> I'm not familiar with VSAT (is this a satellite link? that's my
> guess by the name) so can't provide much assistance with ideas
> here.
>
> - Jared
>