Lan Services; Physical Media - Avaya Media Gateways G250 Overview

!
WARNING:
Do not enable ETR on ports used for DID.
WARNING:
An outside telephone exchange can be connected to the trunk port, and an analog telephone
can be connected to the line port. All calls are then directed by the analog relay between the
outside line and the analog telephone. A current-loop detection circuit prevents ongoing calls
from being disconnected when normal functioning resumes. It is recommended that ETR not be
enabled for line ports that are administered for use with analog DID trunks.
Contact closure
The contact closure feature is a controllable relay providing dry contacts for various
applications. To implement the contact closure feature, connect an Avaya Partner Contact
Closure Adjunct box to the CCA port on the G250/G350 chassis. The adjunct box provides two
contact closures that can be operated in either a "normally closed" or "normally open" state. The
contact closures can control devices such as devices that automatically lock or unlock doors or
voice recording units. The CCA port can be configured so that the connected devices can be
controlled by an end device, such as a telephone. For example, a user can unlock a door by
keying a sequence into a telephone keypad.
Fax, modem, TTY over IP
The G250/G350 supports fax, modem, and TTY over IP.

LAN services

You can use both the Avaya G250 and Avaya G350 Media Gateways as a LAN switch. You can
also integrate the G250/G350 into an existing LAN.

Physical media

The G350 provides LAN services through the following Ethernet ports for the connection of local
data devices:
Switched LAN ports. Configurable switched Ethernet ports on the MM314 media module
●
(see MM314 LAN media module
LAN media module
which automatically detects and corrects the polarity of crossed cables. This results in
simplified LAN installation and maintenance.
on page 32) and the MM316 media module (see
on page 33). The switched Ethernet ports support HP auto-MDIX,
LAN services
MM316
Issue 5 June 2008 45