CGW-I Cellular Gateway BRI-GSM : Installation and Operation Manual
10
This diagram describes a simple PBX NT/CGW-I configuration where the PBX
provides a direct NT interface to the TE interface of CGW. Synchronization is
automatically ensured in this configuration since the single connection to the
CGW-I includes the source clock sent by the PBX.
External Synchronization Feature
If you set up your CGW-I with a configuration that uses the Synch-In
interface to ensure synchronization, you must enable the External
Synchronization feature in the ISDN Settings window. When this feature is
enabled, the CGW-I time clock becomes a “slave” to the external time clock
since it takes the clock it receives from the NT source. When this feature is
disabled, the CGW-I becomes the “Master” of the time clock it sends to the
PBX. You should also disable External Synchronization when the CGW-I
connects to a TE interface. To learn how to set enable the External
Synchronization feature, see page 27.
2.5.
Installation
Setting up your CGW-I requires at least one SIM card from the local GSM
network provider and a few simple connections between the CGW-I box and
the following:
•
RS-232 (Setup)
•
Antenna
•
Communication line
•
Synch-In line (Optional)
•
ISDN trunk interface of your PBX fxo
•
Power supply.
The following sections describe how to make all these connections.
Hanging Up the CGW-I
You can hang the CGW-I on the specially designed mounting plate or
directly on the wall.
To hang the CGW-I directly on the wall, first drill holes according to the
enclosed template, then drill in screws and hang the device from them.
