5 — VoIP overview
5-60 March 2011 Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a
ONT Product Information Guide Edition 01 3FE 54199 AAAA TCZZA
Digit collection can be influenced by the following SIP configuration parameters
(see section 5.6 for details on these parameters):
• permanent timer
• interdigit timer
• critical timer
• use of the Enter key
There are three types of service codes (also called feature codes) to consider in a digit
map:
• The service code is handled locally at the ONT or MDU, for example *70 in SIP
mode 2. Such service codes are not supported in SIP mode 1. These service codes
are not included in INVITE messages.
• The service code triggers a service at the softswitch, but does not have a set of
digits which must then be collected by the ONT or MDU. In this case, the
INVITE contains just the feature code, and is dependent on the softswitch.
• The service code triggers a service at the softswitch, and does have a set of digits
which must then be collected by the ONT or MDU. In this case, both the service
code and the phone number are included in the INVITE message. For example,
*67 followed by 1234567 would invoke called ID blocking on a call to phone
number 123-4567. In most cases, the digit map would include the I (insertion
character) modifier and #, so the INVITE would contain *67#1234567.
Table 5-14 lists and describes the elements, symbols, and modifiers used in the ONT
digit map.
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