number of users to use the E5770s-320 and the average revenue per user (ARPU) of
operators will increase substantially.
Figure 1-1 shows the profile of the E5770s-320.
Figure 1-1 E5770s-320 profile
1.2 Optional Features
Optional features refer to features that are not supported by the standard version or are
disabled by default. These features can be customized according to operator or
customer requirements. The E5770s-320's optional feature is:IPv6/IPv4 dual stack
(optional).