05-04-2021 02:15 AM
We are planning to upgrade our Cisco UCM from 11.0 to 12.5. We do have a number of Voice Gateways whose IOS version is below the minimum on the Cisco compatibility matrix (https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/uc_system/unified/communications/system/Compatibility/CSR-Compatibility-Matrix-InteractiveHTML.html).
My basic question is how much of an issue is this really? I know that it wont be "recommended" - and would cause problems (I guess) if trying to raise a TAC with Cisco, but would it all still work "as is"?
For the record we have five 2900 routers running versions 15.2(4) through to 15.5(3) - Cisco recommend 15.7(3)
We also have a couple of older routers - a 2821 & 3745 - still in active service who are so old that they dont appear on the above matrix.
I'm trying to work out if we can move to 12.5 first and then sort out/upgrade/replace/rationalise the gateways as a separate piece of work, or if we have to do the gateways at the same time (or before).
I'm pretty new to looking at IPT at this level therefore I'm very much still finding my way around, so be gentle
Thanks
Jan
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05-04-2021 03:12 AM
Asper the Compatibility guide for 28XX you need version 15.1(4)M12a, nothing about 3745. But mentioned versions are not available for download from the portal. Since these two models are EOL, its recommended to move to replacement gateways ASAP.
Cisco 2800 Series Integrated Services Routers (EOS) | End of Support | 15.1(4)M12a |
The below screenshot is from CUCM 12.5 for a MGCP configuration. and you can see the model which you mentioned.
05-17-2021 12:17 PM
Any open protocol like SIP or H.323 should work, but any kind of integrations with CUCM/UCCX could be a problem (SCCP Media Resources, MGCP, CPA, so on).
As everyone says, replace these Gateways are very recommended.
05-04-2021 03:12 AM
Asper the Compatibility guide for 28XX you need version 15.1(4)M12a, nothing about 3745. But mentioned versions are not available for download from the portal. Since these two models are EOL, its recommended to move to replacement gateways ASAP.
Cisco 2800 Series Integrated Services Routers (EOS) | End of Support | 15.1(4)M12a |
The below screenshot is from CUCM 12.5 for a MGCP configuration. and you can see the model which you mentioned.
05-04-2021 05:32 PM
The 3745 is even older than the 2821! I'll put my advice is the "use at your own risk" category, but here goes. I had problems in CUCM 9.X with 2800 series MGCP gateways, so anything MGCP could likely be a problem. SIP or H.323 PROBABLY should work, but you are on your own if you try and engage TAC. @Nithin Eluvathingal is quite correct that you need to replace those gateways as soon as you can.
05-17-2021 12:17 PM
Any open protocol like SIP or H.323 should work, but any kind of integrations with CUCM/UCCX could be a problem (SCCP Media Resources, MGCP, CPA, so on).
As everyone says, replace these Gateways are very recommended.
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