pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 367
pef20550
Manufacturer Part Number
pef20550
Description
Extended Line Card Interface Controller Elic
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF20550.pdf
(407 pages)
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6.1.6.4 Build-up of Layer 3
With layer-2 communications set up, terminal B initiates layer-3 build-up as follows:
Received at RFIFO of SACCO-A from terminal B:
Sent from XFIFO of SACCO-A to terminal B:
Subscriber A is now informed that subscriber B is being alerted:
Write
Sent from XFIFO of SACCO-A to terminal A:
Received at RFIFO of SACCO-A from terminal A:
Terminal A will now provide subscriber A with a tone that signals to subscriber A that
subscriber B is being alerted.
6.1.7
When subscriber B answers the call, terminal indicates ‘hook-off’ to the ELIC via a
D-channel message. The data loop that was prepared in chapter 6.1.5.2 can now be
closed. Finally, the hook-off information is acknowledged to terminal B and passed to
terminal A. This indicates to the terminals that their subscribers can start communication.
6.1.7.1 Receiving the Hook-off Information at the ELIC
When subscriber B answers the call, the ELIC will signal a RME interrupt:
Received at RFIFO of SACCO-A from terminal B:
Write
Sent from XFIFO of SACCO-A to terminal B:
Semiconductor Group
Completing the Call
XDC
XDC
= 00
= 01
H
H
direct SACCO-A transmission to IOM-2 port 0, channel 0
direct SACCO-A transmission to IOM-2 port 0, channel 1
367
I-frame: Alerting
Receiver Ready (as
acknowledgement)
I-frame: Alerting
Receiver Ready (as
acknowledgement)
Phone B Rings !
®
I-frame: Connected
Receiver Ready
Application Notes
PEB 20550
PEF 20550
01.96
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