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M2MPaging
The M2MPaging PC2070 is a new MTEL product which
combines E2000 MTEL technology and WBB (wireless broad band) PC2060 MTEL
technology to produce a single board paging solution.
The board can directly modulate a transmitter using
standard PTT and POCSAG 2 level data at baud rates of 512, 1200 and 2400.
The board has been specifically tailored to the
Netcomm MachineLink 3G and Maxon Intelimax M2M modems. However the board can
communicate to any TCP or serial device capable of sending standard TNPP or
PET paging packets.
The output connectors have also been tailored to
connect to Motorola PURC 5000 paging stations via the standard internal
ribbon cable J2590 and wildcard connection J1302.
M2MPaging General Operation
The diagram below is a block diagram of the single
board system. The PC2070 Queuing structure, TMP packet processing and POCSAG
generation have been taken from the MTEL PC2060 and combined it with the
E2005 Encoder.
The E2005 creates the synchronous data stream from
the POCSAG buffers and creates the timing for the start and end of batches
for multiple message transmissions. It creates a very stable synchronous
clock producing minimal jitter necessary for batches of messages greater
than 30 seconds.
The queuing structure is capable of storing 50
messages at 512 baud and 1200 baud separately. The POCSAG generator and
queuing structure are capable of delivering commercial grade performance
equivalent to 25,000 messages a day.
The TMP processing will also determine the frequency
of operation and set the channel control for the appropriate paging on the
correct frequency where the transmitter can operate on different
frequencies.
The TCP connection uses a standard XP100 Lantronics
TCP to serial server to interface to one of two serial ports on the PC2070.
The PC2070 therefore can run on wired as well as wireless TCP systems.
M2MPaging Auxiliary Functions
The PC2070 can operate as a standalone product using
standard TMP packets. However to use the additional functionality and
maintain the M2M link integrity the PC2070 communicates to a M2MPaging
Gateway. The Gateway can monitor the link and report supervisory information
via email, SMS and Paging.
The PC2070 has additional functionality and includes
alarm inputs and additional serial port for relaying external serial devices
down the M2M link.
The diagram below shows the PC2070 modified for the
Vodaphone solution where the additional serial port connects to a WiPath
Paging decoder with dual relay output alarms. In addition it takes a Wired
OR relay output from the PURC5000 for transmitter alarming. The PC2070
encapsulates the serial data from the WiPath decoder and relays it down the
M2M link. It also monitors the relay outputs from the relay and creates
embedded packets back to the M2M link which is terminated by the MTEL M2M
Gateway.
PC2070 Functionality
The diagram below indicates the internal structure
of the PC2070.
The central processing unit is a ZWorld RCM3200
module. It contains the firmware running all the PC2070 functions.
The ZWorld maintains the communication to all 3
serial ports including packet encapsulation for Port C. Ports B and D are
the TMP processing ports. It also polls the 3 relay inputs and reports the
state of these devices in a single transmission back to the gateway.
The power to the CPU, Lantronix, Netcomm and WiPath
decoder are controlled by a simple activity detector. The activity detector
monitors communications on the Port B and lack of data will engage the
watchdog to power down all the devices.
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