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Configuring Phone Lines and Calling Routing Behavior
Configuring Line Interfaces on the SPA9000
SPA9000 Voice System Administration Guide
64
4
Bandwidth Requirements and Call Capacity
The available connection bandwidth determines the maximum number of
simultaneous calls that the system can support with the appropriate audio quality.
Before installing and configuring the Cisco SPA components, use this information
to determine the maximum number of simultaneous VoIP connections that the
system can support. For asymmetric connections, such as ADSL, the maximum
number of calls is determined by the upstream bandwidth. In general it is a good
practice to use no more than 75% of the total available bandwidth for calls. This
provides space for data traffic and helps ensure good voice quality.
The following table provides the approximate bandwidth budget for different
codecs.
Table1
Bandwidth Budgeting
Codec
Approximate bandwidth budget (kbps)
Each side of
conversation
2 calls
4 calls
6 calls
8 calls
G.711
110
220
440
660
880
G.726-40
87
174
348
522
696
G.726-32
79
158
316
474
632
G.726-24
71
142
284
426
568
G.726-16
63
126
252
378
504
G.729
55
110
220
330
440
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Page 67 / 286
Configuring Phone Lines and Calling Routing Behavior
Configuring Line Interfaces on the SPA9000
SPA9000 Voice System Administration Guide
65
4
Setting the Call Capacity Parameter
You can set the maximum total number of incoming and outgoing calls on each line
interface. The default value is unlimited. You can set a value from 1 to 15, or leave
the setting as unlimited.
NOTE
The
SPA9000
does not distinguish between incoming and outgoing calls for call
capacity.
STEP 1
Start Internet Explorer, and then enter the IP address of the SPA9000. Click Admin
Login and then click Advanced.
STEP 2
Click Voice tab
> Line
N
, where
N
represents the line interface number.
STEP 3
Scroll down to the
Subscriber Information
section.
From the
Call Capacity
drop-down list, choose the maximum number of calls to
allow.
SPA9000 Voice > Line: Subscriber Information
STEP 4
Click
Submit All Changes
.
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Page 68 / 286
Configuring Phone Lines and Calling Routing Behavior
Configuring Dial Plans
SPA9000 Voice System Administration Guide
66
4
Configuring Dial Plans
Dial plans determine how the digits are interpreted and transmitted. They also
determine whether the dialed number is accepted or rejected. You can use a dial
plan to facilitate dialing or to block certain types of calls such as long distance or
international.
This section includes information that you need to understand dial plans, as well as
procedures for configuring your own dial plans. This section includes the following
topics:
•
“About Dial Plans,” on page 66
•
“Editing Dial Plans,” on page 74
About Dial Plans
This section provides information to help you understand how dial plans are
implemented.
Refer to the following topics:
•
“Digit Sequences,” on page 66
•
“Digit Sequence Examples,” on page 68
•
“Acceptance and Transmission the Dialed Digits,” on page 71
•
“Dial Plan Timer (Off-Hook Timer),” on page 72
•
“Interdigit Long Timer (Incomplete Entry Timer),” on page 73
•
“Interdigit Short Timer (Complete Entry Timer),” on page 73
Digit Sequences
A dial plan contains a series of digit sequences, separated by the | character. The
entire collection of sequences is enclosed within parentheses. Each digit
sequence within the dial plan consists of a series of elements, which are
individually matched to the keys that the user presses.
NOTE
White space is ignored, but may be used for readability.
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Configuring Phone Lines and Calling Routing Behavior
Configuring Dial Plans
SPA9000 Voice System Administration Guide
67
4
Digit Sequence
Function
0 1 2 3 4 5 6 7 8 9 0
* #
Enter any of these characters to represent a key
that the user must press on the phone keypad.
x
Enter
x
to represent any character on the phone
keypad.
[sequence]
Enter characters within square brackets to create
a list of accepted key presses. The user can press
any one of the keys in the list.
•
Numeric range
For example, you would enter
[2-9]
to allow the
user to press any one digit from 2 through 9.
•
Numeric range with other characters
For example, you would enter
[35-8*]
to allow
the user to press 3, 5, 6, 7, 8, or *.
.
(period)
Enter a period for element repetition. The dial plan
accepts 0 or more entries of the digit. For
example,
01.
allows users to enter 0, 01, 011,
0111, and so on.
<dialed:substituted>
Use this format to indicate that certain dialed
digits are replaced by other characters when the
sequence is transmitted. The
dialed
digits can
be zero or more characters.
EXAMPLE 1:
<8:1650>xxxxxxx
When the user presses 8 followed by a seven-
digit number, the system automatically replaces
the dialed 8 with 1650. If the user dials
85550112
, the system transmits
16505550112
.
EXAMPLE 2:
<:1>xxxxxxxxxx
In this example, no digits are replaced. When the
user enters a 10-digit string of numbers, the
number 1 is added at the beginning of the
sequence. If the user dials
9725550112
, the
system transmits
19725550112
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Configuring Phone Lines and Calling Routing Behavior
Configuring Dial Plans
SPA9000 Voice System Administration Guide
68
4
Digit Sequence Examples
The following examples show digit sequences that you can enter in a dial plan.
In a complete dial plan entry, sequences are separated by a pipe character (|), and
the entire set of sequences is enclosed within parentheses.
EXAMPLE:
( [1-8]xx | 9, xxxxxxx | 9, <:1>[2-9]xxxxxxxxx | 8,
<:1212>xxxxxxx | 9, 1 [2-9] xxxxxxxxx | 9, 1 900 xxxxxxx ! |
9, 011xxxxxx. | 0 | [49]11 )
•
Extensions on your system
EXAMPLE:
(
[1-8]xx
| 9, xxxxxxx | 9, <:1>[2-9]xxxxxxxxx | 8,
<:1212>xxxxxxx | 9, 1 [2-9] xxxxxxxxx | 9, 1 900 xxxxxxx !
| 9, 011xxxxxx. | 0 | [49]11 )
[1-8]xx
Allows a user dial any three-digit number that starts with the digits 1
through 8. If your system uses four-digit extensions, you would instead enter
the following string:
[1-8]xxx
,
(comma)
Enter a comma between digits to play an “outside
line” dial tone after a user-entered sequence.
EXAMPLE:
9, 1xxxxxxxxxx
An “outside line” dial tone is sounded after the
user presses 9, and the tone continues until the
user presses 1.
!
(exclamation point)
Enter an exclamation point to prohibit a dial
sequence pattern.
EXAMPLE:
1900xxxxxxx!
The system rejects any 11-digit sequence that
begins with 1900.
*xx
Enter an asterisk to allow the user to enter a 2-
digit star code.
S0 or L0
Enter
S0
to reduce the short inter-digit timer to 0
seconds, or enter L0 to reduce the long inter-digit
timer to 0 seconds.
Digit Sequence
Function
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