Filter
Top Products
309
Dialogic Corporation
Source address is “sips:” URI, destination address is “sips:” URI
In this scenario, the transport protocol of an initial INVITE is TLS and Global Call acts as TLS
client and server. Global Call will always use a “sips:” URI as the local contact URI unless the
application specifically changes it, which means that the subsequent incoming request message
should use TLS because the local URI is “sips:”.
The following figure illustrates a scenario where all transactions are TLS because both the source
address and destination address are “sips:” URIs.
Figure 56. TLS with “sips” Source Address and “sips:” Destination Address
After the initial INVITE transaction, the transport of subsequent request message to the remote UA
depends on the Contact URI scheme from the remote response or request messages. This means
that the remote UA has the freedom to change the Contact URI to be either a “sip:” or “sips:” URI
independent of initial INVITE request. Global Call will try to use the required transport depending
on the remote Contact URI scheme in conjunction with default transport protocol and any
App TLS
Client &
Server
Global Call
INVITE sips:friend@remote.com SIP/2.0
To:<sips:friend@remote.com>
From:<sips:user@local.com>
Via: SIP/2.0/TLS xxxxxx
Contact: <sips:user@local.com>
200 OK
To:<sips:friend@remote.com>
From:<sips:user@local.com>
Via: SIP/2.0/TLS xxxxxx
Contact: <sips:friend@remote.com>
ACK
To:<sips:friend@remote.com>
From:<sips:user@local.com>
Via: SIP/2.0/TLS xxxxxx
Contact: <sips:user@local.com>
200 OK
From:<sips:friend@remote.com>
To:<sips:user@local.com>
Via: SIP/2.0/TLS xxxxxx
GCEV_DROPCALL
GCEV_RELEASECALL
gc_ReleaseCall()
gc_DropCall()
GCEV_CONNECTED
gc_MakeCall()
destination.address =
"sips:friend@remote.com"
origination.address =
"sips:user@local.com"
With TLS client and server configuration.
gc_Start()
App TLS
Client &
Server
Global Call
With TLS client and server configuration.
gc_Start()
GCEV_OFFERED
gc_Answer()
GCEV_ANSWERED
gc_DropCall()
GCEV_DROPCALL
gc_ReleaseCall()
GCEV_RELEASECALL
GCEV_DISCONNECTED
BYE
From:<sips:friend@remote.com>
To:<sips:user@local.com>
Via: SIP/2.0/TLS xxxxxx