Which two statements about the relationship between the Expressway series and the Cisco Unified Communications...

The Expressway solution can be peered with a Cisco Unified Communications Manager to allow for greater capabilities. This is true because the Expressway-C can connect to the Unified CM via a SIP trunk or a line-side connection, and the Expressway-E can enable firewall traversal and business-to-business communications for the Unified CM endpoints12.

The Expressway series can never operate as a standalone call-control solution. This is false because the Expressway series can act as a standalone call-control solution for SIP and H.323 endpoints, and can provide interworking between them13.

The Expressway series requires the peering with a Cisco Unified Communications Manager to act as a call-control device. This is false because the Expressway series does not depend on the Unified CM for call-control functionality, although it can enhance the Unified CM capabilities when peered with it13.

The Expressway series may operate as a standalone call-control solution. This is true because the Expressway series can support SIP and H.323 endpoints without requiring the Unified CM, and can also provide session management and interworking features13.

The Expressway series only supports SIP-based communications. This is false because the Expressway series supports both SIP and H.323 protocols, and can interwork between them13. References := 1: Cisco Expressway Administrator Guide (X14.0) - Introduction 2: Cisco Expressway Administrator Guide (X15.0) - Unified Communications 3: Concept of Zones Demystified On Cisco Expressway Series