General DataComm — 2 prefixes (MA-L)

General DataComm (also styled "GDC" or "General Datacomm") is a Connecticut-based maker of carrier and enterprise wide-area-network access and switching gear, holding two separate IEEE MA-L OUI assignments — 00:12:19 and 00:C0:64 — both registered to "General Datacomm LLC" at the identical address, 353 Christian Street, Suite 4, Oxford, CT. The company traces back to 1969, grew substantially during the mid-1980s AT&T-divestiture boom, filed for Chapter 11 bankruptcy in October 2001, and re-emerged in 2003 as a smaller, still-operating firm now headquartered in Oxford, CT — the same town the OUI registry lists for both blocks, an independent corroboration that this is a real, ongoing manufacturer rather than a shell registrant. Product lines include the Xedge 6000 Multiservice Packet Exchange, the Packet Cell Switch (PCx), and the SpectraComm family of modems, CSU/DSUs, and Ethernet switches (some models with optional AES encryption) for secure remote access, plus integrated T1/T3/DDS/xDSL access devices aimed at telecom carriers, enterprises, and government networks. No CVEs or vendor-specific security advisories turned up in a limited search pass, so that remains an open question rather than a confirmed clean bill.

IEEE assignment

two MA-L prefixes, 00:12:19 and 00:C0:64 → "General Datacomm LLC" [Confirmed] — the IEEE MA-L registry, the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI) x2 blocks; no matching MA-M block and no MA-S block for General Datacomm LLC specifically (an unrelated UK org, "Datacomm Networks," holds an MA-S at 8C:1F:64) [Confirmed] — the IEEE MA-S registry (no match), the IEEE MA-M registry

HQ / registered address

353 Christian Street, Suite 4, Oxford, CT 06478, US — identical for both blocks [Confirmed] — IEEE MA-L registry

Company history

founded 1969 by Charles P. Johnson; grew to ~2,100 employees by 1985 after the AT&T breakup; filed Chapter 11 in October 2001; re-emerged in 2003 as a smaller (~100-employee) company, now headquartered in Oxford, CT [Confirmed] — https://www.bee-news.com/2022/08/08/general-datacomm-part-ii-of-ii/, https://www.networkworld.com/article/2337707/general-datacomm-resurfaces.html

Company status

active [Likely] — gdc.com is a live, still-updated corporate/product site, though a direct WebFetch of gdc.com/about.html failed with a TLS handshake error; company content here is sourced via web-search snippets/cached indexing rather than a direct page fetch — http://gdc.com/, http://www.gdc.com/about.html

Device types / notable products

Xedge 6000 Multiservice Packet Exchange (carrier-class router/switch), Packet Cell Switch (PCx), SpectraComm modems/CSU-DSUs/routers/Ethernet switches (optional AES on some models), integrated T1/T3/DDS/xDSL access devices, frame-relay service-level probes, SNMP network management [Confirmed] — http://www.gdc.com/products.html, http://www.gdc.com/products/integrated-t1-t3-dds-ip-access.html, https://www.data-connect.com/gdc_base_page.htm

Security context

SpectraComm line advertises optional AES encryption for secure remote access; targeted CVE/advisory search found no vendor-specific hits (not-found result, not a confirmed absence of vulnerabilities) [Likely (product claim) / Unknown (no CVEs found)] — http://www.gdc.com/pubs/0001_scipt1_ds02.pdf, http://www.gdc.com/pubs/0135_sc500a_ds05.pdf

Registration dates

Unknown/not applicable — IEEE's the IEEE MA-L registry schema has no date column; no date sourced or attributed to IEEE for either block [Confirmed]

IANA reference

not applicable / blank — IEEE MA-L record, no IANA reference field [Confirmed]

Related vendors

none identified as affiliated; note the similarly-named but unrelated "Datacomm Networks" (UK, Ruislip), which holds an unrelated MA-S block 8C:1F:64 [Confirmed] — the IEEE MA-M registry

Data-quality caveat

one aggregator (RocketReach) reports a conflicting HQ (Irving, TX, 211 employees) that contradicts the OUI-registry/press-corroborated Oxford, CT facts; treated as stale/unreliable and not used [noted, not adopted]

Analyst note

two independently-verified OUI blocks sharing one exact address, plus a decades-long, third-party-documented corporate history that independently converges on the same Oxford, CT location, together indicate a substantive, ongoing manufacturer rather than a bare single-OUI shell registration.