Lucent Technologies Definity Enterprise Communication Server 8.2 User Manual

Page of 1707
DEFINITY ECS Release 8.2
Administrator’s Guide  
555-233-506  
Issue 1
April 2000
Managing data calls 
404
Data-Only Off-Premises Extensions 
15
Priority Calls
Priority Calls are allowed if the analog station is idle. Call Waiting 
(including Priority Call Waiting) is denied if the station is busy. However, 
Priority Calls appear on the next available line appearance on 
multiappearance telephones.
Service Observing
A data-restricted call cannot be service observed.
Data-Only Off-Premises Extensions
Data-Only Off-Premises Extensions allows users to make data calls involving data 
communications equipment (DCE) or digital terminal equipment (DTE) located 
remotely from the system site.
A Data-Only Off-Premises Extension uses an on-premises modular trunk data 
module (MTDM). The system communicates with remote data equipment through 
the private-line facility linking the on-premises MTDM and the remote data 
equipment.
Users can place data calls to this type of data endpoint using Telephone Dialing or 
Data Terminal (Keyboard) Dialing. Since there is no telephone at the remote site, 
originate data calls from the remote data terminal using Keyboard Dialing only.
Administering Data-Only Off-Premises 
Extensions
1. On the Processor/Trunk Data Module screen, administer all fields. 
Refer to 
‘‘Data modules’’ on page 558
 for more information.
Considerations
The system does not support communications between two TDMs. Modem 
Pooling is similar to a TDM, it cannot be used on calls to or from a 
Data-Only Off-Premises Extension.
Interactions
Telephone Dialing
An on-premises multiappearance telephone may have a Data Extension 
button associated with the TDM used for a Data-Only Off-Premises 
Extension. The telephone user and the remote user share control of the data 
module. Actions of the user at the telephone may affect the remote user.