Bay Networks BayStack 101 CG1001x01 10BASE-T Hub 12-Port RJ-45 NMM Rackmount

Bay Networks BayStack 101 CG1001x01 10BASE-T Hub 12-Port RJ-45 NMM Rackmount

The Bay Networks BayStack 101 is a 12-port 10BASE-T Ethernet hub in a 1U rackmount chassis. It provides 12 RJ-45 ports for 10 Mbps half-duplex Ethernet connectivity, a front-panel RS-232 DB-9 comm port for local management access, and an Advanced NMM (Network Management Module) slot for optional centralized management expansion. The rear panel includes Management Extension In and Out ports and a Segment Select switch for hub or expansion segment configuration.

Specifications & What's Included

• Model: BayStack 101
• Part Number: CG1001x01
• Network Standard: 10BASE-T (IEEE 802.3)
• Speed: 10 Mbps
• RJ-45 Ports: 12 (front panel)
• MDI-X / MDI switch: present (front panel)
• Comm Port: DB-9 RS-232 serial (front panel)
• Management Extension In/Out: two RJ-45 ports (rear panel)
• Segment Select switch: Hub / Exp (rear panel)
• NMM Slot: Advanced NMM slot (front) — module not included
• Expansion module bays: two rear-panel slots (empty)
• Form Factor: 1U rackmount
• Country of Manufacture: United States
• Certifications: UL, CSA, TUV GS, CE, FCC Part 15, VCCI-I
• Included: Hub unit only — no NMM modules, no power cord

Applications

The BayStack 101 is a mid-1990s 10BASE-T Ethernet hub from Bay Networks, a leading networking vendor of that era (later acquired by Nortel Networks). Hubs of this type were the primary method of connecting workstations, servers, and printers in small-to-medium Ethernet segments before managed switches became mainstream. All ports on a hub share the same collision domain, making them straightforward to deploy in legacy environments. The BayStack 101's NMM slot allowed network administrators to add SNMP-based management, giving visibility into port status and network utilization — a notable feature at a time when unmanaged hubs were the norm. Units like this remain in use today in legacy network environments, industrial facilities, and lab setups where 10BASE-T infrastructure is still maintained, and they are also collected by networking historians and hobbyists interested in the Bay Networks / Nortel lineage.