With a broad range of phone systems and compatible phones ranging from the analog EKT series through the DP and DFP, the IVX series of phone systems offers amazing feature sets in a small package.
Avaialable options include the "plain" IVX followed by the E-Class, X-Class and S-Class IVX systems. These offer mixed compatibility with different phones; please see our helpful ESI Compatibility Matrix for specifics.
For larger applications including enterprise-grade features and system sizes, the Communication Server (CS Series) offers modern digital, IP and SIP options for a wide range of customer needs.
If you are looking for a particular ESI phone and can't find it listed here, please contact us and we will get back to you as quickly as possible with whatever help we can offer.