ESI IPFP 48 Key 6V IP Phone (5000-0289) Computer Parts The Cisco Catalyst 3550 is

The Cisco Catalyst 3550 is rack mountable and can fit in any standard 19" chassis

or for companies that want a multitude of connections to their network for redundancy

Supports Session Initiation Protocol (SIP)

Cisco 3845 HSEC/K9 Router Product Information:

4 T1 network interfaces (two of the T1's can be configured for DSX-1 applications)

ESI IPFP 48 Key 6V IP Phone (5000-0289) Computer Parts The Cisco Catalyst 3550 isESI IPFP 48 Key IP Phone Description: The ESI 48 Key IPFP is an IP phone designed for use with IP enabled ESI Communications phone systems. The IPFP 48 Key comes in two variations, regular IP for use over a local area network (LAN) and a RMT version which stands for "Remote". The RMT version of the phone allows you to use the phone over the internet wide area network (WAN). The ESI IPFP 48 Key and ESI IPFP RMT 48 Key phones both other 30 programmable