Exchange data link

The signaling functions that are not provided by a channel associated signaling protocol can be enabled by using an exchange data link—a direct link from the switch to the pSeries computer on which Blueworx Voice Response runs. This link can carry additional signaling information to enable:

• Detection and notification of caller hangup (far-end hangup)
• Provision of call information, such as the caller’s telephone number
• PABX-like functions, such as call transfer and message waiting indication

Exchange data link signaling protocols, such as ACL, SMDI, SMSI, and VMS, are typically used in conjunction with trunks that use a channel associated signaling protocol for call control.