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Julian Koh

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Posted By Julian Koh 09-22-2022 02:49:38 PM
Found In Egroup: Communications Infrastructure and Applications
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We have been using the IPFlex service now for a number of years with only a few issues (certainly fewer than our previous SIP trunk provider). We have 2 trunks, 1 to each of our campuses, with an SBC pair in active/standby configuration. The SBCs were originally from Acme Packet, but they have since ...
Posted By Julian Koh 09-13-2022 01:31:14 PM
Found In Egroup: Wireless Local Area Networking
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Hey Ryan (and others), Can you provide a little more detail on what "significantly impact your service desk" entails here? Just as some context, we at at Northwestern are also looking at what our next network authentication is going to be after being EAP-PEAPv0 (MS-CHAPv2) users since forever. One ...
Posted By Julian Koh 09-12-2022 09:20:33 AM
Found In Egroup: Wireless Local Area Networking
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Yeah the old definitions and experiences of NAC have morphed/evolved to the new terminology of RBAC (Role Based Access Control). -- Julian Y. Koh Director, Telecommunications and Network Services Northwestern Information Technology 2020 Ridge Avenue #331 Evanston, IL 60208 +1-847-467-5780 ...
Posted By Julian Koh 08-29-2022 01:22:07 PM
Found In Egroup: Network Management
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Yes, raw text logs are nice, no question. We are an Infoblox customer, although I would say that buying Infoblox just for DHCP would probably be seen by most as pretty darn expensive just for DHCP. :) -- Julian Y. Koh Director, Telecommunications and Network Services Northwestern Information ...
Posted By Julian Koh 08-22-2022 09:07:34 AM
Found In Egroup: Communications Infrastructure and Applications
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We moved to an auto attendant system from Nuance back in like the late 1990's/early 2000's to replace our live operators. Any failures went to our central help desk as a backup. That system went along with pretty much no maintenance/upkeep (just a few system upgrades along the way) for a looooong time, ...
Posted By Julian Koh 07-16-2022 08:46:21 AM
Found In Egroup: Communications Infrastructure and Applications
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Just so we're all 100% clear - are we talking Cat 6 or 6A for the purposes of this discussion? We've been using 6A for our 10G copper access ports (as well as the wired connections for our APs), and we have seen no problems. We never really installed any Cat 6. -- Julian Y. Koh Director, Telecommunications ...
Posted By Julian Koh 07-01-2022 12:17:43 PM
Found In Egroup: Communications Infrastructure and Applications
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Greetings everyone! Just an update after our AT&T meeting yesterday. The biggest takeaways are as follows: The process by which calls are labeled as spam/fraud/telemarketer is fluid, as algorithms, inputs, and weights are constantly adjusting to account for different behaviors and techniques used ...
Posted By Julian Koh 06-29-2022 03:52:07 PM
Found In Egroup: Communications Infrastructure and Applications
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We're actually having a conversation with AT&T about this tomorrow, because we've been having some interesting scenarios pop up (folks on the Big Ten voice group may remember this from a couple weeks ago. Scenario #1 involves what we believe are crowdsourced reports to the carriers that some of our ...
Posted By Julian Koh 05-26-2022 06:28:22 PM
Found In Egroup: Network Management
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We use nfsen/nfdump. Works fine for what we need it to do. There were a couple recent threads on the NANOG mailing list on this topic. First post in thread from this month is at https://mailman.nanog.org/pipermail/nanog/2022-May/219311.html . -- Julian Y. Koh Director, Telecommunications and ...
Posted By Julian Koh 05-13-2022 09:13:40 AM
Found In Egroup: Network Management
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NU is looking to hire a senior telecommunications technician to work in our field operations group! These folks are responsible for most of the physical/field work for the Telecommunications and Network Services department, including installing/removing equipment in our ~250 buildings, pulling cable, ...
Posted By Julian Koh 05-13-2022 09:09:49 AM
Found In Egroup: Communications Infrastructure and Applications
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NU is looking to hire a senior telecommunications technician to work in our field operations group! These folks are responsible for most of the physical/field work for the Telecommunications and Network Services department, including installing/removing equipment in our ~250 buildings, pulling cable, ...
Posted By Julian Koh 05-10-2022 01:52:48 PM
Found In Egroup: Network Management
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Facilities here runs the construction projects. We have provided them with cabling standards documents that must be adhered to, including providing cable test results after installation. Since we are a chargeback organization, we generally hire the contractors and then bill the central Facilities project ...
Posted By Julian Koh 05-04-2022 09:16:42 AM
Found In Egroup: Communications Infrastructure and Applications
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I am not authoritative by any means on the actual legal requirements, but last year when the announcement was made we put in a translation/routing rule to send 988 calls to the national hotline number. -- Julian Y. Koh Director, Telecommunications and Network Services Northwestern Information ...
Posted By Julian Koh 04-30-2022 09:19:42 AM
Found In Egroup: Network Management
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We've run all of our elevator/emergency phones back to VG350/450-class gateways (because they have dual power supplies). Non-critical analog lines (think fax machine) can go on VG310s.
Posted By Julian Koh 04-27-2022 10:26:00 AM
Found In Egroup: Cybersecurity
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Very interesting, Alex, thanks for sharing. Any chance that this and more details can be shared with the EDUCAUSE WIRELESS-LAN community group? https://connect.educause.edu/community-home/digestviewer?CommunityKey=13578fe0-5ae3-4f3e-9e43-8bf1c8b06c7b -- Julian Y. Koh Director, Telecommunications ...
Posted By Julian Koh 04-27-2022 09:58:26 AM
Found In Egroup: Network Management
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In general we want to make sure that we are using a uniform code level on the same model of switch, and that code is still being supported by the vendor. As far as when we decide to actually do upgrades, those are usually driven by security vulnerabilities and/or bug fixes. This approach can lead to ...
Posted By Julian Koh 04-19-2022 01:23:59 PM
Found In Egroup: Wireless Local Area Networking
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Apparently I need to write something here or my message doesn't go through.
Posted By Julian Koh 04-13-2022 03:28:23 PM
Found In Egroup: Communications Infrastructure and Applications
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Few other considerations that might be useful here: 1.) With respect to capacity planning, you might want to have a conversation with your public safety and emergency notification service provider. If your mass notification system is set to call campus phones as well and play an X-second message to ...
Posted By Julian Koh 04-07-2022 11:46:31 AM
Found In Egroup: Network Management
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Agree with both you and Bruce - the COMMTECH group is definitely going to have more experience with this, and dropping any inbound call with Caller ID set to one of your numbers should prevent at least one avenue for the robocalls. Note that you will need to be cognizant of exceptions that need to be ...
Posted By Julian Koh 03-21-2022 09:02:50 AM
Found In Egroup: Network Management
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This is definitely something we've been monitoring since the balances of pros/cons keep shifting as prices change, we have yet another IPv6 argument on NANOG, we continue to use a little more of our remaining IPv4 space for various things, etc. I'd be interested in hearing where folks are conducting ...