Overlap Receiving - NEC Univerge SV8300 Manual

General Description

Overlap Receiving is available for an incoming call to the SV8300 from ISDN network.

Overlap Receiving is a procedure, used in call establishment of an incoming call, to enable the network to send

called party number digits to the user in successive messages, as and when they are made available from the

remote network.

Operating Procedure

No manual operation is required.

Service Conditions

■

General Conditions

1. This feature conforms to following ETSI standard.

ETS 300 102-1

ETS 300 102-2

ETS 300 403-1

2. The BRI or the PRI blade is required.

3. After ORT timer/T302 timer (15 seconds) is out, the SV8300 connects or disconnects a call according to

the system data programming. When the maximum number of digits has been received, the call is connect-

ed. When the received digits do not reach the maximum digits or exceed the maximum digits, the number

is treated as an unallocated number.

Note: ORT timer is variable (default: six seconds), and should be set to 15 seconds for T302 timer in system data

programming.

4. Connectable bearer services are Speech/3.1KHz audio/Unrestricted digital.

5. Maximum digit number received from ISDN network must be set in system data programming.

6. When the received digits from ISDN network exceed the maximum digit number set by system data, the

SV8300 connects or disconnects a call according to the system data programming.

7. When the sending complete information element is received in SETUP message or INFO message, the

SV8300 connects the call at that time even the received digits do not reach the maximum digit number set

by system data.

8. When the sending complete information element is not received in SETUP message or INFO message, the

SV8300 connects the call at the time when the maximum digit number set by system data is received.

9. When a SETUP message does not include a called party number, the call is connected to the extension or

tandem connection is available if the called party number is received in INFO message.

10. When the SV8300 rejects a call connection due to some reasons, the SV8300 sends the following message

to the ISDN network.

Page 28

UNIVERGE SV8300 Features and Specifications Manual (ISDN/Q-SIG)

NWA-033632-001, Issue 1