Alcatel-Lucent 7360 - Dual SIP Client Mode Using VEIP; Call Flow of a SIP Call Terminated at the ONT

5 — VoIP overview
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02 November 2013 5-15
3FE 55873 AAAA TCZZA Edition 01
ONT Product Information Guide
Figure 5-4 Call flow of a SIP call terminated at the ONT
5.5 Dual SIP client mode using VEIP
A dual SIP client is necessary in networks where provisioning of voice services on
the ONT are done by two different provides, such as in an environment where one
provider owns the physical configuration (e.g. the PON fiber to the ONT device in
the home or business) and another provider wants access to connect end users.
When this occurs on supporting ONT devices, some aspects of configuration such as
data tunnel configuration with QoS or POTS interface settings can be configured by
one provider, and some aspects can be configured by another provider, such as SIP
service parameters or DHCP server configuration for IP address allocation.
The domain managed by the provider dealing with physical aspects of ONT
configuration, such as port settings, is done by traditional network service providers,
and configuration is done in a traditional manner via OMCI.
A VEIP is a mechanism for an external network or element manager to configure and
otherwise manage an ONT. This external manager can be used to configure other
functionality of the ONT that is not done via OMCI, for example, L3 or wireless
interfaces. At this virtual termination point, the external manager has access to the
interface or to traffic on the interface. The P-OLT manages the VEIP using OMCI to
terminate VLANs as on any other UNI.
Traditional L2 functions continue to be managed by OMCI using the P-OLT or a
network management system.
INVITE
180 RINGING
PRACK
100 TRYING
200 OK (PRACK)
200 OK (INVITE)
ACK
Send ringing with caller ID
Off hook
Stop ringing
18586
ONTPhone
Speech path established
Softswitch