roaming-user-access   : enable: specifies that the
roamers can access the APN. This parameter is optional.

disable: specifies that the
roamers cannot access the APN. This parameter is optional.

Using the
visiting-user-access command, you can enable the APN to allow visitors to
access the APN. The default value is enable.

enable: specifies that the
visitors can access the APN. This parameter is optional.

disable: specifies that the visitors cannot access the APN. This
parameter is optional