The MIB defines the attributes of the programmable tones specified in ITU-T E.180 Supplement 2. Each country has its own regulation to the generation and detection of the call progressing tones such as dial tone, busy tone, ring back tone. The tone attributes are programmable, for example frequency, amplitude, cadence and duration of the tone.

MIB content (29 objects)


Cisco Systems, Inc.
Contact info
Cisco Systems Customer Service Postal: 170 W. Tasman Drive San Jose, CA 95134 USA Tel: +1 800 553-NETS E-mail:


2003-05-28 00:00
Initial version of the MIB.