psb4595 ETC-unknow, psb4595 Datasheet - Page 66

• Manufacturer Part Number: psb4595
• Description: Analog Line Interface Solution Alis
• Manufacturer: ETC-unknow

be read from the register XR6 (see “XR6 Extended Register 6 (Power State)” on page
49).
As a second step, only if enabled by RM (see “CR1 Configuration Register 1 (Dialing)”
on page 40) in ringing mode, the TIP/RING signal will be band-filtered and compared to
a programmable threshold. If the result is higher than this threshold, the RMR-bit signal
is set to one. The ring threshold can be polled as the RMR bit in CR1. The following flow
charts show these sequences in more detail.
Note: The initial connection to TIP RING looks like a ring voltage to ALIS-A. The reaction
To detect a valid ring signal and caller ID, ALIS must be programmed to the following
setting:
• set RM to ’1’ (see “CR1 Configuration Register 1 (Dialing)” on page 40)
• cadence time-out must be programmed to PTT requirements (see “XR2 Extended
• ring latency timer must be programmed to a value higher than four times the ring
• valid ring coefficients
• set No_auto_ring to ’0’ (see “CR1 Configuration Register 1 (Dialing)” on page 40)
• enable Call_en (see “CR2 Configuration Register 2 (Caller ID)” on page 41)
• enable corresponding interrupts
Semiconductor Group
Register 2 (Cadence Time Out)” on page 47)
period (see “XR5 Extended Register 5 (Ring Timer)” on page 49)
of ALIS-D depends on the auto_ring bit:
a) auto_ring: ALIS-D goes to ringing, since the spike is not a valid ringing signal.
ALIS-D then goes to sleep mode.
b) No_auto_ring: ALIS-D generates a ring interrupt, stays in sleep mode and waits
for a command. The user has to switch ALIS-D to ringing and poll the RMR bit. If
ringing is not valid (RMR bit = 0), the chip can be set back to sleep mode.
66
Analog Line Interface Solution
PSB 4595 / PSB 4596
Operating Modes
Data Sheet 06.98