Unified Communications

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  • 1.  Physical SBCs for the Branch Office

    Posted 12-08-2020 04:29 PM

    Hello all -

    I am hoping this group has some good input on a question that has been posed to us in telecom, and that question is this:

    How do we go about putting SIP Trunking at remote locations that have less then 50 people in the building (Branch Office)? These locations are geographically diverse from our main campus, by hundreds of miles, so maintaining a local survivability is required in any design we build out. That means for us, we have to have a SIP Trunk provided at the location, and can't trunk it back to our Main Campus, in the event the WAN between sites goes down. The LSP/Branch Session Manager and SBC, should still be able to operate to provide inbound/outbound calling. Furthermore, all of these sites do not have a Virtual server infrastructure to build upon, so we are left with having to use physical device of some sort if we go SIP/SBC. Also to throw a wrinkle in this, one of the sites may also require Remote Worker functionality through the SBC (So we are looking for both Trunking and Remote Worker on the same SBC).

    So MY real question for the group here is, how do you go about providing SIP trunking at your remote locations that may fit the description above? I have seen and read about some smaller SBCs (i.e. Oracle, Audio Codes, etc.), I have also seen where folks have stood up a server, and ran a small/local VM instance, and put Avaya SBCE on it, and I bet there are other out of the box ideas as well. What I really would like to know from the group is, what have others done here?  Was it affordable, what worked well, and what issues you all might have run into?



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    James Davis
    Voice and Data Senior Engineer
    University of Nebraska Medical Center
    Omaha NE
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  • 2.  RE: Physical SBCs for the Branch Office

    Posted 12-08-2020 04:39 PM
    We are using routers with 4G LTE as our survivable links should the WAN circuit go down.  The amount of call traffic may be limited and should be load tested, but it has worked for our purposes for several years.  Good cellular service is also a requirement :-)

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    Shaun Smith
    UTHealth
    Houston
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  • 3.  RE: Physical SBCs for the Branch Office

    Posted 12-08-2020 04:51 PM
    Check out the Portwell CAD-0230 to see if it meets your needs.

    -James

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    James Rawland
    Telecom Engineer
    PeaceHealth
    Springfield OR
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  • 4.  RE: Physical SBCs for the Branch Office

    Posted 12-08-2020 04:57 PM

    Thanks James R. -

    Yeah I was wondering what devices some of the other folks I saw had talked about using a local system to host it... I will check these out and see where/how they might fit in our planning. Glad you shared that!

    James



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    James Davis
    Voice and Data Senior Engineer
    University of Nebraska Medical Center
    Omaha NE
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  • 5.  RE: Physical SBCs for the Branch Office

    Posted 12-10-2020 04:49 AM
    Edited by Arslan Ali 12-10-2020 04:50 AM
    HI James,

    We have exactly the same scenario / setup as mentioned in your post, for multiple locations.
    Our branch offices uses Portwell CAD-0230 hardware SBC to terminate the SIP trunks and they are connected back to HQ SM for Sunny days and fallback to local BSM/LSP running on S8300 for rainy days, it has been working well from couple of years.

    We don't have RW on these SBCs, for them we have kept separate SBCs in HQ running on VMware, this is to centralized the setup and cut down costs for Public IP and Certs,during Rainy day we don't get redundancy for RWs but our business case justifies it.

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    Arslan Ali
    UC Consultant
    Vodafone
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  • 6.  RE: Physical SBCs for the Branch Office

    Posted 12-08-2020 04:56 PM

    Thanks Shaun -

    That great out of the box thinking there, I didn't even think about looking at evaluating some sort of WAN Failover back to the main site, and 4G LTE might fit the bill nicely. I will have to ponder that, and kick it around.

    Thanks!

    James



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    James Davis
    Voice and Data Senior Engineer
    University of Nebraska Medical Center
    Omaha NE
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