Implementing and Operating Cisco Collaboration Core Technologies (CLCOR) — Question 146

An administrator works with an ISDN PRI that is connected to a third-party PBX. The ISDN link does not come up, and the administrator finds that the third-part
PBX uses the QSIG signaling method. Which command enables the Cisco IOS Gateway to use QSIG signaling on the ISDN link?

Answer options

• A. isdn switch-type basic-qsig
• B. isdn switch-type basic-ni
• C. isdn switch-type primary-qsig
• D. isdn incoming-voice voice

Correct answer: C

Explanation

The correct command is 'isdn switch-type primary-qsig' because it specifically configures the ISDN interface to use QSIG signaling, which is necessary for compatibility with the third-party PBX. The other options either refer to different switch types or are unrelated to QSIG signaling, making them unsuitable for this configuration.