AEQ
PHOENIX STRATOS
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This situation corresponds to use an Internet access by means of a single workstation
router (just one equipment connected) and to hire a fixed IP.
•
Dynamic public IP addresses, corresponding to use an Internet access by means of a
single workstation router and a dynamic IP (the most usual). Allows the use of URIs of
the name@domain (PROXY SIP) or name@IP-address (DIRECT SIP) type, but it is
advisable always to work with an associated SIP server (PROXY SIP), since the IP
address assigned to the equipment may change each time the user powers up the unit.
•
Private IP addresses, both static and dynamic, corresponding to connections in a local
network with several workstations, that access to the Internet through a router with
NAT. Those do not allow the use of URIs of the name@IP-address type because the IP
address of the identifier is not public, and is only valid in the section of the network to
which it has been assigned; it lacks a universal meaning. In this case the use of an
associated SIP server and a STUN server is imperative to get past the NAT (Network
Address Translation) implemented in the router that acts as an interface between the
private network and the public one. See section NAT TRAVERSAL (3.1.5.2.4).
C4.3. PHOENIX STRATOS default configuration.
To simplify operating the unit, AEQ offers, at no additional cost, the services of 2 own
SIP servers.
PHOENIX STRATOS is supplied from the factory with both SIP servers preconfigured
(SYSTEM
SIP PROVIDERS menu) defined as “AEQ” and “AEQ 2” with the following
configuration:
•
PROXY SIP “AEQ” Host: sip.aeq.es
•
PROXY SIP “AEQ 2” Host: sip2.aeq.es
•
PROXY SIP “AEQ” and “AEQ 2” Port: 5060
•
PROXY SIP “AEQ” and “AEQ 2” Domain: sip.aeq.es
•
PROXY SIP “AEQ” and “AEQ 2” Register Expires: 60 min.
PHOENIX STRATOS is supplied preconfigured with 2 users registered in both servers:
•
PROXY SIP “AEQ” and “AEQ 2” Authentication Users: phxstratos_XXX y
phxstratos_XXY (where Y=X+1)
•
PROXY SIP “AEQ” and “AEQ 2” Authentication Passwords: 8 digits alphanumerics
passwords
This configuration is the right one for working with any of both AEQ’s SIP servers.
C5. STUN protocol.
STUN (Simple Transversal of UDP over NATs) is a network protocol of the client /server type
that allows NAT clients to find their public IP address, the type of NAT where it is located and
the Internet port associated with the local port through NAT. This information is used to
configure a UDP communication between two hosts located behind NAT routers.
NAT (Network Address Translation) is a mechanism used by IP routers to exchange packets
between two networks that assign each other incompatible addresses. It consists of converting,
in real time, the addresses used in the transported packets. It is also necessary to edit the
packets to enable the operation of protocols that include address information within the protocol
conversation. It is most commonly utilized to enable the use of private addresses and still
provide connectivity with the rest of the Internet.
PHOENIX STRATOS includes a STUN client that sends a request to a STUN server. The STUN
server then informs the client of its public IP and which port has been opened by NAT to permit
incoming traffic to enter the client’s network. This information enables the PHOENIX STRATOS
to identify its position within the SIP server. This protocol is used in “AUTO3” and “AUTO4” NAT
TRAVERSAL modes (see section 3.1.5.2.4).
