Hunt Group with Pots lines in Call Manager

Question

Hello all.  I have a site with 12 Pots lines.  It is all configured via Call Manager.  We are using mgcp.  I asked the telco to setup the numbers to hunt which they said they did but still when I call the main number second time it just rings and eventually get some voicemail that is not from the call manager.  I think I need to setup Hunting in the Call Manager?  Is that correct?
Line Group --> Add the extensions in here and set them up to hunt?
Hunt List --> Create a Hunt list and associate a Line Group with it?
Hunt Pilot --> I add all the extensions in here?

Answer 1

Let's take one step back. What are you trying to accomplish? I am assuming you want to market one number but have the ability to accept multiple calls on that number. If that is the case, having the telco set up a hunt is the way to go.
Beyond that, where do you want those calls from the PSTN to route? Are you wanting those calls to ring a hunt group on your side? If so, you will need to do the following:
     1. Configure a Line group. (Call Routing -> Route/Hunt -> Line Group) This is where you will be adding the extensions. You will also need to specify a distribution algorithm. The distribution algorith, is where you will be choosing how you want the extensions to ring. For instance, if you set the DA to broadcast, every extension in the line group will ring at the same time. Click Help --> this page, while you are in the line group configuration page to get more information about the settings you can modify and different algorithms you can use.
     2. Configure a Hunt List. (Call Routing -> Route/Hunt -> Hunt List) You will need to create a new Hunt List and add your line group to it. The hunt list is evaluated in a top down fashion. You can get pretty tricky with multiple line groups with different distribution algorithms in your hunt list, but if you just want something basic,just add the line group you made.
     3. Configure the Hunt Pilot. (Call Routing -> Route/Hunt -> Hunt Pilot) The hunt pilot will be the dialed number that triggers the hunt group. Make sure you select all the required settings. You will be selecting the hunt list you just made in this configuration page. Be sure to set a maximum hunt timer and final destination so that the calls do not just ring forever. You can get pretty granular with the settings in here. Reference the help --> this page document for more information.
     4. POINT THE FXO PORTS TO THE HUNT PILOT. This is very important. Calls to your analog lines will not trigger the hunt group unless you point the ports to the Hunt Pilot. If you are using MGCP/SCCP you will need to enter the hunt pilot in the "Attendant DN" field for EVERY FXO port. If you do not enter a value here, CUCM will have no idea what to do when the port rings. It will not answer the call if there is no value specified. This would explain why your calls were ending up with the telco voicemail service; CUCM was never answering the call.
If you completed the above steps correctly, you should be able to call the main number multiple times and have the calls go to a hunt group on your side, no matter which line the call ends up coming in on.
Let me know if you have any questions, this can be kind of tricky at first.
PS, if the calls were going to a voicemail that wasn't from Call Manager (Unity Connection) call the telco and have them remove voicemail service from the lines, assuming you have configured Unity Connection to handle that.
Hope this helps,
Dallan