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The ESI SIP 8 Card is designed for the ESI Communications Servers and offers eight SIP trunk ports. The ESI 5000-0550 Card features dual LAN ports for connectivity as well as a single USB port for configuration.
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1. Second Expansion Console supported by only IP Server 900, ESI Communications Servers, and [legacy] IVX X-Class.
2. Availability of IP capabilities determined by system configuration. IP-enabled legacy ESI systems use different IP desktop phones for local and remote applications.