Digital Repeater, Call Groups, and Zetrons.

[Grecon]

I am looking into Replacing an MTR2000 with attached Zetron 48 max. which currently has 4 call groups and 10 XPR6550's in each group.
Callers now dial extension, hear a brief message then dial two digits to be connected to the correct radio group.
I appears that if I change to an SLR 5000 series that Callers will need to dial at least 4 digits to be connected to the groups. is this correct?
they will need to dial 8 for group, a 1 or 2 for timing then the group code. is there a way to do this only using two digits? will the 48 max work with the SLR 5000 or will I need something like a Model 30 or 735?

 

[Firebuff880]

Why do you think anything changes. The interface is just the 600 ohm balanced audio option (factory install) isn't it ?

You may need to update some pins between the two, but since all the magic is in your Zetron changing the repeaters should be transparent.

Now if you are gong to go DMR and intend to use the SLR's Telephone interconnect feature ($$) then you are rebuilding from scratch. I did a similar interface a few years back and used an Asterisk build instead of Zetron. Gave us a lot more flexibility.

 

[Grecon]

Yes - I didn't think anything would change on the phone connection end, just concerned that persons calling a radio group from a phone may need to dial 4 digits as opposed to two digits to get the radio group they want to contact. It would appear that the SLR needs and input to distinguish between a call to a specific radio (7) or a group (8), another input for timing(Channel - either 1 or 2) and the last two digit inputs for the group code. or does the repeater know that if the input is 10 for example - that its a group call going through channel 1. I do not have a manual for an SLR just shopping and looking at this point and wanted to see if anyone else has made this change. I definitely do not want callers dialing more numbers and could set this up through an auto attendant with prompted, paused auto dial with all for digits, but that will increase overall call to ring time 10 to 20 seconds.

 

[Firebuff880]

Yes - I didn't think anything would change on the phone connection end, just concerned that persons calling a radio group from a phone may need to dial 4 digits as opposed to two digits to get the radio group they want to contact. It would appear that the SLR needs and input to distinguish between a call to a specific radio (7) or a group (8), another input for timing(Channel - either 1 or 2) and the last two digit inputs for the group code. or does the repeater know that if the input is 10 for example - that its a group call going through channel 1. I do not have a manual for an SLR just shopping and looking at this point and wanted to see if anyone else has made this change. I definitely do not want callers dialing more numbers and could set this up through an auto attendant with prompted, paused auto dial with all for digits, but that will increase overall call to ring time 10 to 20 seconds.

What you are describing is the Feature enabled Telephone interconnect. Something I don't believe the MTR2000 supported, although I never worked with that repeater specifically. There is a lot more to the interface than just sending the code you describe. But you are right about the codes which is why we built an Asterisk gateway with a modified rpt module through Dahdi to simply the process.

 

[Firebuff880]

PS: This is covered in the chapter 2.20 Digital Telephone Patch (DTP). If the current system planning guide.