Cisco 2500 Series Model 2503 Dual Serial Router Rack Mountable

They were superseded by the Cisco 2600 series, which has also reached EOL now. Manufacturer:- Cisco. Supported interfaces: Ethernet (10 Mbit/s), Token Ring (16 Mbit/s), ISDN BRI (128 kbit/s), Sync Serial (2 Mbit/s), Async Serial.

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