Nortel Networks 9150 - Manual (Page 222)

192 Remote Gateway 9150 Installation and Administration Guide
Configuring the Remote Gateway 9150 unit Standard 3.1
IP configuration
This section explains how to enter the IP address, subnet mask, and default
gateway for the Remote Gateway 9150 unit.
Note: Even if you plan to route calls over the PSTN only, you must assign an IP
address and gateway to the Remote Gateway 9150 unit and RLC to allow remote
administration.
Getting there 9150 → Configuration Manager → IP Configuration
IP Configuration property sheet