Specifications

Product Description
IP Office Release 7.0
© 2011 AVAYA All rights reserved.
Page 269
Issue 22.a.- (21 March 2011)
Callback
Three types of call back are supported
· LCP (Link Control Protocol)
After authentication the incoming call is dropped and an outgoing call is made to a predefined number to
re-establish the link.
· Callback CP (Microsoft's Callback Control Protocol)
After authentication from both ends, the incoming call is dropped and an outgoing call to a predefined
number made to re-establish the link.
· Extended CBCP (Extended Callback Control Protocol)
Similar to Callback CP however, the Microsoft application at the remote end will prompt for a telephone
number. An outgoing call will then be made to that number to re-establish the link.
Domain Name Service (DNS) Proxy
Domain Name Service servers provide the translation of names such as www.avaya.com to the domain’s IP
address required to establish a connection. IP Office provides this service to PCs on the network by proxy.
Network Address Translation (NAT)
Network Address Translation is a mechanism that allows you to use different IP address on your private
network behind a router with a public IP Address. When connecting to the Internet, ISPs typically want a
customer to use an IP address they have allocated. Using NAT this is easily accommodated, eradicating the
need for the customer to change their network numbering scheme and providing additional security to the
internal users as their address in hidden to the public.
Typically, a company maps its internal network addresses to a global external IP address and unmaps the
global IP address on incoming packets back into internal IP addresses. This helps ensure security since each
outgoing or incoming request must go through a translation process. This also offers the opportunity to qualify
or authenticate the request or match it to a previous request. NAT also conserves the number of global IP
addresses that a company needs.
Proxy Address Resolution Protocol (ARP)
Support for Proxy Address Resolution Protocol allows IP Office to respond on behalf of the IP address of a
device connected to it when receiving an ARP request.
Auto Connect
If a service is idle, that is no one is using the Internet, Auto Connect allows the IP Office to periodically connect
to a service. This is ideal for mail polling to retrieve email from an Internet Service Provider. An 'Auto Connect
Time Profile' controls the time period during which automatic calls are made, for example not at weekends or
during the middle of the night.
Firewall
IP Office integrated firewall provides packet filtering of the most common IP protocols including File Transfer
Protocol (FTP) and Internet browsing (HTTP). Each protocol passing through the firewall can be restricted/
allowed access in four different ways:
· Drop
No sessions via this protocol will be allowed through the wall
· In
An incoming session can "punch a hole" in the wall to allow traffic in both directions
· Out
An outgoing session can "punch a hole" in the wall to allow traffic in both directions
· Bothway
An incoming or outgoing sessions can "punch a hole" in the wall to allow traffic in both directions.
In cases where a protocol is not supported by default, the firewall can be customized to control packets based
on their content.
IP Office allows the configuration of as many firewalls as needed through IP Office Manager. This permits
different security regulations to be applied to individual dial-in users and data services.