Avaya 03-300430 User Manual
SER-BUS (Serial communication bus)
Issue 1 June 2005
1957
SER-BUS (Serial communication bus)
G650
Each port network of G650s has a Serial Bus that allows the TN231O2BP IPSI to communicate
with the 655A power supplies. This Serial Bus uses 2 previously unused leads in the Universal
Port Slot. SPARE3 (pin 055) now becomes serial data. SPARE4 (pin 155) now becomes serial
clock. The serial communication bus is a two-wire bi-directional half-duplex bus that is provided
on the backplane of the G650. The serial bus consists of a clock line and a data line. Data is
transferred on the data line synchronously in bit-serial fashion a byte at a time. Communication
on the serial bus is at speeds up to 100 kbits per second.
Older TDM/LAN cables did not have these 2 leads so the G650 required a new TDM/LAN cable.
These 2 leads are not terminated on the TDM/LAN Terminators (AHF110). This is an
open-collector bus where each power supply and each TN2312BP IPSI provide a pull-up
resistor to +5VDC for each of the 2 Serial Bus leads. The bus will have logic pulses extending
between 0V and 5V.
The TN2312BP IPSI in the A carrier will act as master of the serial bus and poll each of the
power supplies based on their board address. Only a TN2312BP IPSI in the A carrier can be a
bus master, even if a TN2312BP in carrier B is used for port network connectivity. Therefore,
setting the TN2312BP in the A carrier or B carrier to be active will not clear a problem if the
TN2312BP itself is the reason for the failure. The power supply’s board address is derived from
4 board address leads in the power slot of the backplane. The G650 carrier addressing paddle
card sets 3 of these 4 address leads for the power slot. A G650 can have a maximum of ten
655A power supplies on the serial bus (See
with the 655A power supplies. This Serial Bus uses 2 previously unused leads in the Universal
Port Slot. SPARE3 (pin 055) now becomes serial data. SPARE4 (pin 155) now becomes serial
clock. The serial communication bus is a two-wire bi-directional half-duplex bus that is provided
on the backplane of the G650. The serial bus consists of a clock line and a data line. Data is
transferred on the data line synchronously in bit-serial fashion a byte at a time. Communication
on the serial bus is at speeds up to 100 kbits per second.
Older TDM/LAN cables did not have these 2 leads so the G650 required a new TDM/LAN cable.
These 2 leads are not terminated on the TDM/LAN Terminators (AHF110). This is an
open-collector bus where each power supply and each TN2312BP IPSI provide a pull-up
resistor to +5VDC for each of the 2 Serial Bus leads. The bus will have logic pulses extending
between 0V and 5V.
The TN2312BP IPSI in the A carrier will act as master of the serial bus and poll each of the
power supplies based on their board address. Only a TN2312BP IPSI in the A carrier can be a
bus master, even if a TN2312BP in carrier B is used for port network connectivity. Therefore,
setting the TN2312BP in the A carrier or B carrier to be active will not clear a problem if the
TN2312BP itself is the reason for the failure. The power supply’s board address is derived from
4 board address leads in the power slot of the backplane. The G650 carrier addressing paddle
card sets 3 of these 4 address leads for the power slot. A G650 can have a maximum of ten
655A power supplies on the serial bus (See
Note:
Note:
The serial bus is provided only to a G650 equipped with TN2312BP IPSI circuit
packs. The serial bus is not available on any other media gateway.
packs. The serial bus is not available on any other media gateway.
these components.
MO name
Alarm level
Initial SAT command to run
Full name of MO
SER-BUS
MIN
test environment location sh
SER communication bus
SER-BUS
MAJ
test environment location l
SER communication bus