Installation guide

Synapse Installation Guide Back to Contents
Installation 17
Extension Assignments
The system assigns the first Deskset to join the network as extension 200. At this point
you can use the Dial Plan Settings page in the WebUI to set a different first digit for
extension numbers for Desksets that will be connected to the network. The WebUI calls
this the Default Phone Extension Prefix. If desired, you should also change the number
of digits from three to four at this point.
The system automatically assigns each additional Deskset an extension number in
ascending order as it is connected to the LAN.
Once the Desksets are connected to the same network, they find each other through
Peer-to-Peer (P2P) discovery protocols and automatically self-configure. Additional
telephony and network configuration is administered through the WebUI.
Even if you unplug a unit, its extension number is reserved. If you want to remove an
extension from the network, you must delete the extension number using the WebUI
Device Management menu. Deletion ensures that the Deskset does not tie up an
extension. You can use the WebUI to change or delete extension numbers.
If your site is one of several Remote Sites using SB67070 SIP Gateways, depending on
your dial plan and other configuration, you may want to ensure that extension numbers
do not overlap with the Remote Sites. You can prevent overlap either by choosing a
unique first digit (Default Phone Extension Prefix) or by restricting your extension
numbers to a range. For example, your site uses 200 to 249, while another site uses 250
to 299.
For more information, see the Synapse Administrator’s Guide at
www.telephones.att.com/synapseguides.
Placement Considerations
Avoid placing any Synapse component too close to the following:
 Communication devices, such as television sets, DVD players, or other cordless
telephones
 Excessive heat sources
 Noise sources, such as a window with traffic outside, motors, microwave ovens,
refrigerators, or fluorescent lighting
 Excessive dust sources, such as a workshop or garage
 Excessive moisture
 Extremely low temperature
 Mechanical vibration or shock, such as on top of the washing machine or
workbench.
ATA Placement Considerations
You can install an optional ATA near the Gateway, or near one of the third-party devices
that are being used with it. For example, it might be easier to connect the ATA to the fax
machine in the room with the fax machine instead of running a telephone line connection
from the fax to an ATA located in a telephone equipment cabinet.