Connect Telephone, Fax Machine, or Modem

Option B—Connecting Cisco 802 and Cisco 804 Routers

Figure 5 Connecting an 802 or 804 Router to an ISDN Line

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Cisco 804 router

 

 

ISDN U

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ISDN wall jack

RJ-45-to-RJ-11 adapter cable

Step 1 Connect the red cable to the red ISDN U port.

Step 2 Connect the other end of the cable to the ISDN wall jack. If your wall jack has an RJ-11 connector, attach the RJ-45-to-RJ-11 adapter cable to the red cable, and then connect the RJ-11 connector to the ISDN wall jack.

Connect Telephone, Fax Machine, or Modem

If you have a Cisco 803 or Cisco 804 router, you can connect a touch-tone telephone, fax machine, or modem. Use the cables provided with these devices.

The gray PHONE 1 and PHONE 2 ports are RJ-11 connectors. If you are outside of North America, you must buy and attach adapters that allow your telephones, faxes, or modems to be connected to these RJ-11 connectors. In some countries, these adapters need additional electronics to convert the telephones, faxes, or modems to work properly with the router phone ports. For example, in the United Kingdom, you must buy an adapter that also provides a master socket, which causes incoming calls to ring the connected devices. For information on recommended master sockets, see the Cisco 800 Series Routers Hardware Installation Guide.

Caution Do not connect the router telephone ports to the telephone wall jack. These ports are not meant for direct connection to the public network. This connection can damage your router.

Option B—Connecting Cisco 802 and Cisco 804 Routers

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Cisco Systems 2800 Series Connect Telephone, Fax Machine, or Modem, Option B-Connecting Cisco 802 and Cisco 804 Routers
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2800 Series specifications

The Cisco Systems 2800 Series routers represent a significant advancement in integrated services router technology, offering a blend of voice, security, and data capabilities. Designed for small to medium-sized businesses as well as enterprise branch office environments, these routers deliver reliable performance while enabling seamless connectivity for various applications.

One of the standout features of the 2800 Series is its modular design. This allows organizations to customize their networks according to specific needs. The router supports a variety of interface cards, helping to accommodate different WAN technologies like T1/E1, DSL, or fiber, ensures versatility in adapting to evolving business demands.

In terms of performance, the Cisco 2800 Series offers high throughput and can handle increasing amounts of network traffic without compromising on speed. It integrates advanced routing capabilities such as Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), and Enhanced Interior Gateway Routing Protocol (EIGRP), enabling efficient communication and dynamic routing within the network.

Security is another critical component of the 2800 Series. The routers come with built-in features such as firewall protection, Virtual Private Network (VPN) support, and intrusion prevention systems. These capabilities enhance the security posture of an organization and protect sensitive data from unauthorized access.

Additionally, the 2800 Series includes robust QoS (Quality of Service) functionalities. This ensures that voice and video applications receive priority over less critical traffic, which is essential for maintaining the quality of real-time communications. The ability to manage bandwidth effectively is crucial for businesses that rely on VoIP, video conferencing, and other bandwidth-intensive applications.

The Cisco 2800 Series supports various protocols, including IPv4 and IPv6, thus future-proofing investments and accommodating the gradual shift towards newer networking standards. With enhancements in Power over Ethernet (PoE) capabilities, the routers can directly power supported devices such as IP phones or wireless access points, streamlining installation and reducing the need for additional electrical infrastructure.

In conclusion, the Cisco 2800 Series routers are designed to meet the growing needs of modern businesses. Their modular design, robust security features, advanced routing capabilities, and effective QoS make them a preferred choice for organizations looking to enhance their network efficiency, reliability, and performance. This series continues to be a cornerstone in networking solutions for businesses aiming to future-proof their communications infrastructure.
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