Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
136
5.2 How to Make Calls in the ARIA-130 WOTS
A. Before Making Initial Call
It is similar to other calls in a telephone system to make a call in ARIA-130 WOTS, except that every call
to or from a wireless terminal involves establishing RF link to the wireless terminal through a base station.
In an idle status, a wireless terminal scans a dummy bearer from base stations and locks to the base
station with the strongest signal. The dummy bearer is similar to the control channel in a cellular
telephone system. If the wireless terminal can not synchronize to a dummy bearer, it can not make a call.
System ID(PARK) is very important in the ARIA-130 WOTS calls. The WTIB should be assigned to a
unique ARIA-130 WOTS ID(PARK).
Installation Engineer should not use the other PARK ID as LGE
assigns to the each system.
Wireless terminals should be programmed with a system ID that matches a
particular ARIA-130 WOTS before communicating with a base station in the system.
Calls to Wireless Terminal
1.
The WTIB receives a call from an extension of the system.
2.
To locate the called party, the WTIB sends a request containing the ID of the called wireless terminal
to all base stations.
3.
The called wireless terminal responds to the base station onto which it is locked.
4.
The RF link is established. The call then proceeds like other calls in the office telephone system.
Initiated Call from a Wireless Terminal
1.
The wireless terminal locks onto a base station and initiates a RF link.
2.
The base station transmits call information to the WTIB. The call then proceeds like other calls in the
office telephone system.
B. Controlling a Call
During a call, interaction occurs mainly between the wireless terminal and a WTIB. The wireless terminal
accepts input at the keypad by user and sends the information to a WTIB via base station. The WTIB
handles most of signaling functions and controls the display of wireless terminal.
C. Terminating a Call
Call termination involves releasing a voice channel and taking a wireless terminal into a standby status.
When WTIB recognizes that a call has terminated, it sends a release message to a base station. The
base station and wireless terminal are released.
In some cases, the base station should initiate call termination by sending a message to the WTIB. Loss
of wireless terminal power and interference with the RF signal are examples of events that cause the
base station to terminate a call abruptly.
