Hi I understand Josue's question to be about RTP multiplexing, where on a packet level the media streams of multiple calls are bundled within a single large packet with one header. This method saves a lot of bandwidth as the packet headers are fairly large, and reducing these headers can easily halve bandwidth usage. This is quite useful for low bandwdith links. I chatted to Anthm long ago about this, but it is not a priority issue due to the fact that most Freeswitch users have more than enough bandwidth that they do not have to be concerned about how to squeeze 30 channels of voice down a 256k line :) regards Clive On Tue, 31 Jan 2012 06:22:48 +0300 freeswitch-users-request@lists.freeswitch.org wrote

Josue,

...

Is there any way to have a SIP Trunk. I mean to have for example 32 channels merged in one? or something like this? When i try to find SIP trunk on internet i just see options for TDM gateway or similar but not really a multiplexed trunk.

Let's define a SIP trunk for this discussion as "virtual internet connection" between your switch or gateway's IP address and your SIP provider's IP address. Over this connection your SIP provider can send you any number of simultaneous conversations (basically equivalent to "channels" or "time slots" in the TDM world). A SIP "trunk" can have as many simultaneous conversations ("Channels") as you wish, limited only by your internet bandwidth, how many "channels" you wish to pay for, and any limits set by your SIP provider. Also the SIP trunk can have as many different DID numbers as you wish or as limited by your provider. In this scenario, your provider is multiplexing the TDM sources into your SIP trunk. In its most basic form, a SIP provider can "point" the SIP traffic directly at your Freeswitch's external IP address and there you are!! Set up Freeswitch to be compatible with your Provider's requirements and you are there.

As far as TDM gateways are concerned, if you are using legacy equipment that requires TDM service, there are several SIP-TDM gateways available that can receive the SIP traffic from your Provider and convert it back-and-forth between SIP and TDM. As far as the suitability and hardware requirements for Freeswitch to perform that function, since I am newly acquainted with Freeswitch, I leave that discussion to those who are experienced.

Win N.

-----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Sergey Okhapkin Sent: Saturday, January 28, 2012 12:14 To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] SIP Multiplexed Trunk as IAX2 or TDM

SIP (and RTP) have no concept of trunking/audio frames multiplexing unlike IAX2 and TDM.

On Saturday 28 January 2012 21:06:50 Josue Diaz Cruz wrote:

...

Is there any way to have a SIP Trunk. I mean to have for example 32 channels merged in one? or something like this? When i try to find SIP trunk on internet i just see options for TDM gateway or similar but not really a multiplexed trunk.

Can we do something with freeswitch?

Josue Diaz Cruz

Departamento Tecnico y Soporte

<mailto:jdiaz@coinfru.com> jdiaz@coinfru.com

C/ Balsicas 3

Alquerias | 30580 | Murcia

<http://www.coinfru.com/> www.coinfru.com

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