6.2.3.4.2.3 Remote Access to the Analog Modem
When the analog modem is used, it is necessary to hold a DDI number in the public numbering plan in
order to be able to carry out remote maintenance.
In the case of no DDI number is available, the access to the modem will be possible only via the
operator transfer.
6.2.3.4.3 Operating Mode
1. Open OMC on the remote access PC.
2. Select the Expert menu.
3. Click Comm.
4. Select Connect. The Communication Path window is displayed.
5. Click Modem direct, then OK.
6. There are two ways of establishing a remote connection:
• Select a modem phone book entry in the Used Entry field of the Modem Connection window.
• Click Dialing, select the modem to use ("used modem"), then dial the customer remote access
number in the Number field.
7. Enter the system's default password pbxk1064. It will take a few seconds for the connection to be
established.
6.2.3.4.4 Security
In the remote access, the protocol used in the "data link" OSI layer is PPP (Point-to-Point Protocol).
The TCP/IP protocols are used respectively in the "transport" and "network" layers. For each layer,
OXO Connect carries out an access control.
6.2.3.4.4.1 Authentication
At the start of the connection (PPP), an account name (system masked) and password (pbxk1064) are
required. This account name is automatically generated by OMC. The password is required by OMC to
establish a direct connection (LAN) with OXO Connect. Any other authentication will be rejected.
6.2.3.4.4.2 Firewall
If the system accepts the authentication, the PPP connection will be established, and all the data
packets received on this interface will be filtered according to the following rules:
All the packets are refused except:
• packets bound for OXO Connect FTP server via two TCP ports preset for the PBX configuration by
OMC.
• control packets using the ICMP protocol (Internet Control Message Protocol).
6.2.3.5 OMC Remote Access by VPN
As of OXO Connect 2.1, the Cloud Connect solution allows to establish a VPN connection between
OXO Connect and OMC via a VPN gateway hosted in the Remote Service Center.
6.2.3.6 Access With Proxy
A proxy server can be added to improve security.
To connect a remote OXO Connect via a proxy server, the login dialog box can request a user account
and password to connect to the proxy server.
Chapter
6
Start-Up
3EH21123USAA - Ed. 01 - April 2017 - Installation Manual 187/207
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