CHAPTER
4-1
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
4
Basic and Additional SIP Services
This section provides information about key basic and additional SIP services that the CiscoATA
supports:
•Important Basic SIP Services, page 4-1—This section includes a list of parameters that you must
configure in order for the CiscoATA to function in a SIP environment.
•Additional SIP Services, page 4-3—This section contains information about additional, commonly
used SIP features, with references to the parameters for configuring these services.
•Complete Reference Table of all Cisco ATA SIP Services, page 4-12—This section contains a
complete listing of CiscoATA services supported for SIP, and includes cross references to the
parameters for configuring these services. This section includes services not described in th e
sections about the key basic SIP services and the commonly used additional SIP services.
Note The term Cisco ATA refers to both the CiscoATA 186 and the Cisco ATA188, unless otherwise stated.

Important Basic SIP Services

This section provides descriptions and cross references for configuring required SIP parameters and also
for configuring other important basic SIP services:
•Required Parameters, page 4-1
•Establishing Authentication, page 4-2
•Setting the Codec, page 4-3
•Configuring Refresh Interval, page 4-3

Required Parameters

If the UseSIP parameter is set to 1 (you are using the SIP protocol), you need to supply values for the
required SIP parameters shown in Tabl e 4-1. The Parameter column provides the name of the parameter
and a cross reference which provides a more-detailed description of the parameter.
Note See Chapter 5, “Parameters and Defaults,” for information about additional Cisco ATA parameters.