The SM-2501 Ethernet Link Protector provides
a programmable automatic link backup capability to "mission-critical"
100BaseTX and 10BaseT Ethernet links. Protects vital connections to servers,
routers, and other key Ethernet devices that require fail-safe link
operation. The SM-2501 operates by non-intrusively monitoring a "primary"
link and, in the event of a failure, automatically switching to the backup
link. The Link Protector does not require any additional network cards in a
server and does not require router-level switch-overs if a failure occurs.
The backup link can be connected to either another port on a hub or an
entirely different hub altogether for greater protection. The unit also
functions in a back-to-back configuration for redundant wiring applications.
Key Benefits
Supports 10/100 Mbps Autonegotiation
Audible Alarm and Contact Closure Output for Link Failure Notification
Programmable Switchover Delays
Manual Override for Forced Switching
Outbound Generation of Link Integrity Signals to avoid False Alarms on
Inactive Links
Jumperless System Configuration Stored in Non-Volatile Memory
PRODUCT DESCRIPTION
The SM-2501 Ethernet Link Protector provides a programmable automatic
link backup capability to "mission-critical" 100BaseTX and 10BaseT Ethernet
links. Protects vital connections to servers, routers, and other key
Ethernet devices that require fail-safe link operation. The SM-2501 operates
by non-intrusively monitoring a "primary" link and, in the event of a
failure, automatically switching to the backup link. The Link Protector does
not require any additional network cards in a server and does not require
router-level switch-overs if a failure occurs. The backup link can be
connected to either another port on a hub or an entirely different hub
altogether for greater protection. The unit also functions in a back-to-back
configuration for redundant wiring applications.
FEATURES
Automatic Switching to Backup Link Occurs Within 600 to 1100
Milliseconds to Avoid Protocol-Timeouts
Automatic Switch-Back to Primary Link on Restoration of Service
Supports 10/100 Mbps Autonegotiation
Completely Transparent in Normal Operation - Does Not Affect IEEE
Repeater Budget Calculations
Audible Alarm and Contact Closure Output for Link Failure Notification
Default Connection to Primary Link in Case of Power Interruption
Outbound Generation of Link Integrity Signals to avoid False Alarms on
Inactive Links
Programmable Switchover Delays
Manual Override for Forced Switching
Multiple LED Indicators for Status Display
Jumperless System Configuration Stored in Non-Volatile Memory
Interoperates with SM-250, SM-2500, SM-2503, and SM-2512 Series Link
Protectors
APPLICATIONS
Provide Backup for Critical 100BaseTX and/or 10BaseT Links to Servers,
Routers, and other Vital Equipment
Protect Against Failures of Primary Link Due to Cable Cuts,
Disconnected Cables, and Hub Failures from Malfunctioning Ports, Plug-in
Cards, or Power Supplies
Add Redundant Network Wiring in conjunction with other Shore
Microsystems Link Protector products.
SPECIFICATIONS
Standards: IEEE 802.3u 100BaseTX and 802.3 10BaseT Ethernet
Connectors: Three RJ45 Twisted Pair Jacks: One Primary, One Backup,
One Direct Station Connection (Server Port); One 3.5mm Alarm Contact Jack;
One 12V DC Power
