Zy Assure Advance Replacement Service is designed for customers who require hardware & software support but who do not require an engineer site visit. The Advanced Replacement Services covers the following: 9x 5 Technical Support, allowing you access to Zy XEL Support staff. 9x 5 Remote Diagnostics performed by Zy XEL Support staff who may access real-time configurations, check hardware & software revision levels, & perform system checks such as port statistics to enable the prompt resolution of technical issues. Advanced Hardware replacement for arrival within next business day (NBD). This service ensures that you receive the replacement hardware promptly in the unlikely event the issue cannot be resolved by the Zy XEL support staff.