Datasheet

Configuring Voice Ports
Configuring Digital Voice Ports
VC-82
Cisco IOS Voice, Video, and Fax Configuration Guide
Disconnect Supervision Commands
PBX and PSTN switches use several different methods to indicate that a call should be disconnected
because one or both parties have hung up. The commands in this section are used to configure the router
to recognize the type of signaling in use by the PBX or PSTN switch connected to the voice port. These
methods include the following:
• Battery reversal disconnect
• Battery denial disconnect
• Supervisory tone disconnect (STD)
Battery reversal occurs when the connected switch changes the polarity of the line in order to indicate
changes in call state (such as off-hook or, in this case, call disconnect). This is the signaling looked for
when the battery reversal command is enabled on the voice port, which is the default configuration.
Battery denial (sometimes called power denial) occurs when the connected switch provides a short
(approximately 600 ms) interruption of line power to indicate a change in call state. This is the signaling
looked for when the supervisory disconnect command is enabled on the voice port, which is the default
configuration.
Supervisory tone disconnect occurs when the connected switch provides a special tone to indicate a
change in call state. Some PBXs and PSTN CO switches provide a 600-millisecond interruption of line
power as a supervisory disconnect, and others provide supervisory tone disconnect (STD). This is the
signal that the router is looking for when the no supervisory disconnect command is configured on the
voice port.
Command Purpose
Step 1
Router(config-voiceport)# calling-number outbound
range string1 string2
(Cisco AS5300 universal access server only)
Specifies ANI to be sent out when the T1-CAS
fgd-eana command is configured as signaling
type. The string1 and string2 arguments are valid
E.164 telephone number strings. Both strings must
be of the same length and cannot be more than 32
digits long.
Only the last four digits are used for specifying the
range (string1 to string2) and for generating the
sequence of ANI by rotating through the range
until string2 is reached and then starting from
string1 again. If strings are less than four digits in
length, then entire strings are used.
Step 2
Router(config-voiceport)# calling-number outbound
sequence [ string1 ] [ string2 ] [ string3 ] [ string4 ]
[ string5 ]
(Cisco AS5300 universal access server only)
Specifies ANI to be sent out when the T1-CAS
fgd-eana command is configured as signaling
type. This option configures a sequence of discrete
strings (string1...string5) to be passed out as ANI
for successive calls using the dial peer or voice
port. Limit is five (5) strings. All strings must be
valid E.164 numbers, up to 32 digits in length.
Step 3
Router(config-voiceport)# calling-number outbound null
(Cisco AS5300 universal access server only)
Suppresses ANI. No ANI is passed when this
voice port is selected.