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Meridian Digital Telephone IP Adapter Installation and Administration Guide 37
October 2001 Planning for installation
IP deployment
Before deploying your Meridian Digital Telephone IP Adapter unit, ensure that
you engineer the IP network properly. You can configure a permanent (Model 1)
or on-demand (Model 2) IP connection. The following guidelines describe
requirements, conditions, and characteristics of each supported IP deployment
option:
Model 1: IP permanent
If using DSL or a cable modem, configure an IP permanent connection.
!
The Meridian Digital Telephone IP Adapter unit re-establishes its TCP/IP
signaling session to the RLC once per minute.
!
The Meridian Digital Telephone IP Adapter unit supports both static IP
and, through DHCP, dynamic IP addressing
!
Do not configure a remote IP address on the RLC.
!
One virtual private network (VPN) supports multiple Meridian Digital
Telephone IP Adapter units.
!
One Network Address Translation (NAT) router supports only one
Meridian Digital Telephone IP Adapter unit.
!
One Port number and Network Address Translation (PNAT) router supports
multiple Meridian Digital Telephone IP Adapter units.
!
The RLC requires an IP address that the Meridian Digital Telephone IP
Adapter unit can access.
Model 2: IP on-demand
If your BRI routers incur toll charges, configure an IP on-demand connection.
!
TCP/IP signaling sessions between the RLC and the Meridian Digital
Telephone IP Adapter unit close when calls end.
!
Configure a static IP address for the Meridian Digital Telephone IP Adapter
unit on the RLC for best service.
!
IP on-demand configuration supports VPNs.
!
IP on-demand configuration does not support NAT or PNAT routers.
!
Both the RLC and Meridian Digital Telephone IP Adapter unit require IP
addresses that are accessible from the other unit.