Alcatel-Lucent 7330 - Page 217

5 — VoIP overview
Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a March 2011 5-17
3FE 54199 AAAA TCZZA Edition 01 ONT Product Information Guide
Table 5-5 Voice gateway mode considerations
Softswitch modes
There are two softswitch modes: H.248/Megaco and SIP softswitch modes. In these
modes, some configuration elements associated with VoIP provisioning can be
derived automatically from the DHCP/BRAS servers on the network. Package D
ONTs do not support softswitch modes.
The ONT and the softswitch trigger the ARP proxy function for individual MAC
address learning.
Table 5-6 describes the use of different DHCP options in the different VoIP modes.
Table 5-6 DHCP options and VoIP modes
Type Consideration
ONT configuration The static IP addresses must be derived and configured
along with termination identifiers on the ONT during the
POTS provisioning time. No DHCP function is expected.
Voice gateway configuration The ONT IP addresses and the termination identifiers must
be configured on the voice gateway.
File download The ONT is expected to use an embedded configuration for
voice gateway applications. File download is not necessary.
The embedded configuration profile is stored on the ONT
flash. ONTs are shipped from the factory with the
embedded profiles already installed. New configuration
files can be downloaded to the ONT flash via FTP.
ONT and voice gateway MAC
configuration
The ONT and voice gateway MAC addresses are fixed at the
ONT and the voice gateway. The MAC addresses are
exchanged as part of the ARP.
DHCP option Function Voice gateway
mode
H.248 Softswitch
mode
SIP mode 1
(for IP0E)
SIP mode 2
(for IPoE)
1 IP subnet mask Not recommended Supported Supported Supported
3 Default IP router Not recommended Supported Supported Supported
6 DNS server address Not supported Not supported Supported Supported
50 IP address of VoIP
service on the ONT
Not recommended Supported Supported Supported
61 ONT client ID Not recommended Supported
(1)
Supported Supported
66 FTP server’s IP address
(used if FTP download
is needed)
Not recommended Supported Supported Supported
90 DHCP authentication Not recommended Supported Supported Supported
(1 of 2)