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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)

Skinny Station Registration Process

Cisco IP Phones communicate with Cisco CallManager using the Cisco Skinny Station Protocol.

The registration process allows a Skinny Station, such as a Cisco IP Phone, to inform

Cisco CallManager of its existence and to make calling possible. The following figure shows the

different messages that are exchanged between the Cisco IP Phone (the “station”) and the

Cisco CallManager.

StationRegister

StationReset

Call

Manager

Skinny

Client

StationIpPort

StationRegisterAck

Additional Optional Messages

StationVersionReq

StationVersionRes

StationButtonTemplateReq

StationButtonTemplateRes

StationTimeDateReq

StationDefineTimeDate

StationCapabilitiesRes

StationCapabilitiesReq

Contents

Main Page Page Page Page Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1) 2000 Cisco Systems, Inc. 6 Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Cisco CallManager IP WAN Region1 Region2 A B C D E F Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1) 2000 Cisco Systems, Inc. 81 The following table provides field definitions for CDRs. Page Page Page Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1) 2000 Cisco Systems, Inc. 85 The following table provides field definitions for CMRs (diagnostic CDRs). Page Page Page Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1) 2000 Cisco Systems, Inc. 89 The following table provides values and descriptions for codec types. The following table provides a list of cause codes that may appear in the Cause fields.