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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for H.323 (version 3.0)
OL-4804-01
Chapter 5 Parameters and Defaults
Dial Plan Parameters
Note No syntax check is performed by the actual implementation. The administrator has the responsibility of
making sure that the dial plan is syntactically valid.
Dial Plan Rules
The Cisco ATA supports the following dial plan rules:
• (In Rule) for Dial Plan Blocking, page 5-54
• ‘H’ Rule to Support Hot/Warm Line, page 5-54
• ‘P’ Rule to Support Dial Prefix, page 5-55
• ‘R’ Rule for Enhanced Prefix, page 5-55
• ‘C’ Rule for Call Blocking, page 5-56
• ‘F’ Rule for Call Forwarding Blocking, page 5-56
• ‘X’ Rule for Call Blocking and Call Forwarding Blocking, page 5-57
• ‘D’ Rule for Displaying Caller ID, page 5-57
(In Rule) for Dial Plan Blocking
Dial plan blocking can be used to reduce the occurrences of invalid dialed digits being sent and can
prevent the dialed string of a specified pattern from being sent. By adding dial plan blocking, dialed
digits are discarded after the interdigit timer expires unless one of the specified matching rules is met.
In addition, the default nine-second global interdigit timeout value is also modified with the value specified
in the dial plan blocking command:
Syntax
In
where n specifies the global interdigit timeout and the valid values are 1-9 and a-z (10-35).
Example
Ic| 911
This command specifies an interdigit timeout of 12 seconds, and will discard dialed digits unless 911 is
entered.
Specifying your own interdigit timeout also changes the behavior of the dial plan so that the entire dial
string, rather than being sent at timeout, is sent only as a result of a matching rule or time intended by a
matching rule.
‘H’ Rule to Support Hot/Warm Line
Hotline/Warmline, also known as Private Line Automatic Ringdown (PLAR), is a line used for priority
telephone service. If the Hotline feature is configured, the Cisco ATA immediately dials a pre-configured
number as soon as the handset goes off hook. If the Warmline feature is configured, the Cisco ATA dials a
pre-configured number if no digits were entered before the specified timer value expired when the handset
went offhook.