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The Cisco 837 routers are asymmeric digital subscriber line (ADSL)-over-plain old telephone service (POTS) routing devices. They have an integrated 4-port Ethernet switch for the LAN and an ADSL physical interface for the WAN, allowing the routers to connect a corporate telecommuter or small office to corporate LANs and the Internet.
The routers support high-speed encryption, the 10/100BASE-T switch, and dial backup functionality via the auxiliary console port. The autosensing function in these routers eliminates the need for a crossover cable and allows the router to detect medium dependent interface in normal mode (MDI) or medium dependent interface in crossover mode (MDIX) in any other PC or hub with a straight-through cable or a crossover cable. The routers are capable of bridging and multiprotocol routing between LAN and WAN ports.
The dial backup feature allows the user to connect an analog modem to the console port as a backup link to the WAN in case the ADSL service goes down. This feature gives the Cisco 837 routers a high level of performance and security.
The Cisco 837 router is designed with both hardware-based and software-based encryption.
SNMP Telnet console port Syslog Trivial File Transfer Protocol (TFTP) client and server Cisco Service Assurance Agent (SAA) Out-of-band management through virtual AUX port
DES 3DES Radius PAP CHAP
Cisco 837 Series IOS IP/FW 3DES
1 Year Limited
PWR_OK ADSL_CD ADSL_RxD ADSL_TxD E1 Status E2 Status E3 Status E4 Status LAN_RxD LAN_TxD
Number of Ports
Fast Ethernet Port
0 ft to 10000 ft Operating
10% to 85% Non-condensing Relative Humidity Operating
32°F (0°C) to 104°F (40°C) Operating / -4°F (-20°C) to 149°F (65°C) Non-operating
Manufacturer Part Number
Manufacturer Website Address
Cisco Systems, Inc
837 Broadband Router
Broadband Transmission Speed
Broadband Transmission Technology
Cisco SDM CRWS Dial backup with external modem through virtual AUX port NAT many-to-one (PAT) NAT many-to-many (multi-NAT) H.323 support with NAT NetMeeting V.2.10/1 and 3.01 IP Control Protocol (IPCP) address and subnet negotiation Dynamic Host Control Protocol (DHCP) client and server DHCP relay DHCP client address negotiation
Cisco 837 ADSL Router Yellow Ethernet cable Desktop power supply Black power cord Product documentation and Cisco 800 and SOHO Series Product Documentation CD-ROM Light blue console cable (RJ-45-to-DB-9)
Alcatel ASAM 1000 Alcatel 7300 Lucent Stinger ECI: ADI 918 ECI: ADI 930 Siemens XpressLink 2.0 Siemens XpressLink 2.1
Certifications & Standards
Safety: UL 1950/CSA 950-95: Third Edition IEC 950: Second Edition with Amendments 1, 2, 3, and 4 EN60950: 1992 with Amendments 1, 2, 3, and 4 CS-03, Canadian Telecom Requirements FCC Part 68 U.S. Telecom Requirements AS/NZS 3260: 1996 with Amendments 1, 2, 3, and 4 ETSI 300-047 TS 001 with Amendment 1 EMI AS/NRZ 3548: 1992 Class B CFR 47 Part 15 Class B EN60555-2 Class B EN55022 Class B VCCI Class II ICES-003, Issue 2, Class B, April 1997S IEC 1000-3-2 Immunity: IEC 1000-4-2 (EN61000-4-2) IEC 1000-4-3 (ENV50140) IEC 1000-4-4 (EN61000-4-4)
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