Alcatel-Lucent 7330 Product Information Manual page 263

This example:
•
The example allows these type 1 service codes: *70/1170 and *52/1152. The
cancel call waiting and call hold service code parameters in the XML download
data must also be configured with these features codes for the features to work
properly.
•
Allows these type 3 service codes: *67/1167, *82/1182, *88/1188, and *90/1190.
*67/1167 and *82/1182 can be entered together in any order and can be followed
by *88/1188 or *90/1190. This ordering may be important in some cases.
•
All other service codes are type 2.
•
S and R modifiers are used with most codes; however, the S modifier is not
required except for the type 1 codes.
•
R modifiers are not necessary on the *70/1170 and *52/1152 codes, the ONT will
output correct tones as part of Type 1 processing.
•
The E modifier in the example will cause special emergency call behavior in the
ONT if 911, 0911 or 1911 is dialed.
RFC2833 DTMF digit transmission
Inband transmission of DTMF tones only occurs when digit collection is not being
performed. This inband transmission provides a way for a server to independently
collect dialed digits, allowing the ONT to pass them transparently. By comparison,
RFC2833 transmission of DTMF is an alternative method of transmitting DTMF
digits.
In VoIP processing, the use of RFC2833 is a negotiated item in the Session
Description Protocol (SDP). The SDP Offer/Answer negotiation is used to determine
if the two endpoints should actually use RFC2833 transmission or not.
When using the RFC2833 transmission method, digits are encoded in
RFC2833-defined packets so the server does not have to decode RTP packets in
order to process DTMF tones. When RFC2833 packets are used for DTMF
transmission, the DTMF tones are not sent in the encoded RTP data.
The 7342 ISAM FTTU provides a provisioning option to enable or disable this
feature so the ONT knows whether or not to initiate offers with RFC2833 or not. See
the SIP provisioning parameter enable_rfc2833 in Table 5-11.
INFO-based DTMF digit transmission
As an alternative to RFC2833 DTMF transmission, the ONT supports sending and
receiving DTMF digits in SIP INFO messages. The digit is represented in the body
of the INFO messages following a content type header of
application/telephone-event as follows:
Content-Type: audio/telephone-event
Content Length: 4
Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a
3FE 54199 AAAA TCZZA
Note —
This feature does not change how pulse dialing is handled,
and applies to DTMF only.
Edition 01 ONT Product Information Guide
March 2011
5 — VoIP overview
5-63