[Freeswitch-users] Bridge question

Wed Apr 24 21:54:32 UTC 2019

Mario,
Thanks for your reply.  I think I get the majority of what you are saying.
I am pretty sure the I can get it based on your response as my requirements are not as broad as yours.

If I set the effective caller id name and number to the external values and then use sip_h_In-Reply-To=${sip_call_id} for the internal extensions in the dial-string, I think I am good.

I was wondering if I could set the channel variables for caller id in the dial-string with {} or in this case []?

That of course leaves the political debate of how long to delay for VM (call_timeout=) and [leg_delay_start=] for the cell phone connection (attempt).

Sean

From: FreeSWITCH-users <freeswitch-users-bounces at lists.freeswitch.org> On Behalf Of mario_fs
Sent: Wednesday, April 24, 2019 11:40 AM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] Bridge question

I do exactly that and more. First, see this page for what the caller hears: https://freeswitch.org/confluence/display/FREESWITCH/macOS

I replace the early media ringing with custom prerecorded messages that includes the caller name.

The I bridge with the parts below built from a LUA program. The called cell phone displays the callerid of the original caller (that took a year to figure out).

What you are after is "sip_h_In-Reply-To=${sip_call_id}”. But… keep two things in mind: First. Your ITSP must support it, in my case I use Callcentric and you MUST inform them you are doing this so they can turn it on for your account. Second, the biggie: with stir/shaken (https://www.fcc.gov/call-authentication) coming up I don’t think this will be possible anymore. See my comment below.

{originate_timeout=48,alert_info=<http://127.0.0.1>;info=Family}${group_call(deskphone@${domain_name}+A)},${group_call(iPads@${domain_name}+A)},${group_call(iPhones@${domain_name}+A)},[leg_delay_start=24,leg_timeout=24,sip_h_In-Reply-To=${sip_call_id}]sofia/gateway/${dial_gateway}/12121234567,[leg_delay_start=24,leg_timeout=24,sip_h_In-Reply-To=${sip_call_id}]sofia/gateway/${dial_gateway}/12127654321

More than you asked about but important to note:
Because of problems below (there are more) bridging to a cell phone, I am trying something different and if it works will put it in the wiki. Instead of bridging the call I want to make the cell phone a simple Freeswitch extension. That resolves all the problems including passing callerID. This is done using VPN and a SIP app, in this case Bria for iPhone which uses Apple Notifications to trigger the app when a call comes on. Only problem is… VPN on demand does not work with Bria because it uses sockets instead of the recommended Apple API. So I have been trying to convince Counterpath to add one DNS lookup to trigger VPN On Demand. This solution would be 1000 percent better than bridging.

Problems with this method:

  *   Due to the T-Mobile (ATT and Verizon same) 30 second ring limit before voicemail, we cannot ring our iPhones at the same time as the local phones, so people have to wait a very long time before the cell rings.
  *   When the iPhones do ring, we may miss a call simply because we cannot get the iPhone out in 20-30 seconds.
  *   If the cellular network has a quirk, the iPhone will not connect for a long time, then a voicemail is taken by the iPhone VM( which we never look at) instead of Freeswitch, so the voicemail is essentially lost.

On Apr 23, 2019, at 2:19 PM, Sean Devoy <sdevoy at bizfocused.com<mailto:sdevoy at bizfocused.com>> wrote:

Hi,

My customer wants to ring the local extension, then 15 seconds later connect their cell phone.  I have the leg_delay_start working fine.  What I don’t know is how to pass the internal Caller ID to one and the external caller id to the other?

Thanks,
Sean
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