HP G250 User Manual download pdf (Page 45)

LAN services

Issue 5 June 2008 45

WARNING:

WARNING: Do not enable ETR on ports used for DID.

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

on page 32) and the MM316 media module (see MM316

LAN media module on page 33). The switched Ethernet ports support HP auto-MDIX,

which automatically detects and corrects the polarity of crossed cables. This results in

simplified LAN installation and maintenance.

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HP G250 User Manual Page 45