Mitel SX 200 ML PABX Instructions Guide
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DATASET 2 100 Series Description Terminate B channel command, which it can do because the D channel is active while the B channel session is in progress. Data is clocked to and from the shift registers at a constant rate by the synchronous clocks on the PI.5232 interface. The data set firmware converts this data into packets which are passed through the PABX in Ul frames. No error detection or correction is performed on this data; synchronous data usually includes its own error detection and correction protocol, and it is more important to maintain the synchronization between the two endpoints. The synchronization is done by a software Phase Locked Loop algorithm, which actually becomes a frequency locking loop. X.31 - It is a protocol for adapting a data rate from a synchronous interface to a 64-kbps channel, such as is used by MITEL PABXs. This mode will allow Mite1 equipment to be connected to another manufacturer’s equipment without having protocol conversion in between. The synchronous data that is being received must be HDLC based, with a maximum frame size of 512 bytes. The DATASET 2100 decodes the received HDLC frames and reformats them into new HDLC frames using the X.31 protocol on the B channel. The rate conversion is done by transmitting HDLC flags during B channel idle time. Received frames are depack- etized and transmitted to the attached device in HDLC format at the RS-232 interface synchronous clock rate. Asynchronous Operation 10.4 The DATASET 2100 Series can operate in asynchronous mode in simplex, half du- plex, or full duplex modes. Once the communications are established between data sets in asynchronous mode, the D channel connection is dropped, and only the B channel connection remains. The B channel passes through the PABX, without su- pervision by the PABX, connected only to the two endpoints. Back-to-Back Operation 10.5 Two DATASET 2100 Series may be connected back to back to communicate directly with each other (typically to bypass a failed PABX). At least one of the data sets must be in hunt mode; the data set then alternates between master and slave timing until synchronization is achieved. If both data sets are in hunt mode, it can take up to one minute to achieve synchronization. A back to back connection may be established as above in either synchronous mode or in asynchronous mode between two DATASET 2100 series. If the DATASET 2100 Series is in both master mode and asynchronous mode, the back to back connection can also be made with a DATASET I 100 series. The data set that is operating in master mode scans its DIP switches on power up, and sets its operating parameters according to the settings of the switches. March 1997 Issue 1 Revision 0 1 o-3
Peripheral Devices Timing Modes 10.6 There are four modes of timing available with a DATASET 2100 series that are used according to the current mode of operation. Internal - The Internal clock is used when the DATASET 2100 Series is operating in Data Communication Equipment (DCE) mode. The transmit clock (SCT) to the Data Terminal Equipment (DTE) is generated within the dataset’s baud rate generator and is not synchronized with PABX timing. The dataset’s receive clock (SCR) to the DTE is extracted from the data received from the far end dataset by the Phase Locked Loop (PLL) circuit within the dataset. System - The System clock is used when the DATASET 2100 Series is operating in Data Communication Equipment (DCE) mode. The dataset’s transmit clock (SCT) and receive clock (SCR) to the DTE are extracted from the data received from the far end devices by the Phase Locked Loop (PLL) circuit within the dataset. Transmit External - The DATASET 2100 Series uses the Transmit External clock in either DTE or DCE mode; it is received from an external clock signal from the attached device. From a DTE device, the clock is received on RS-232 pin 24; from a DCE device, the clock is derived from the DCE device’s SCR. The dataset’s receive clock (SCR) to the DTE is extracted from the data received from the far end device by the Phase Locked Loop (PLL) circuit within the dataset. Transmit and Receive External - When the DATASET 2100 Series is operating in DTE mode, the Transmit and Receive External clocks are derived from the attached DCE device. The external transmit clock is received from the modem’s SCR (pin 17) and transferred to pin 24 by the DCE adapter; the external receive clock is received from the modem’s SCT (pin 15) and transferred to pin 18 by the DCE adapter. Modem Adapter 10.7 DATASET 2100 Series are DCE devices, as are modems. To connect a DATASET 2100 Series to a modem requires that a Modem Adapter (pn 9141-l 00-lOO-NA) be connected to the RS-232 connector on the data set. The Modem Adapter makes the DATASET 2100 Series appear as a DTE device to the modem. DATASET 2100 Switch Settings 10.8 There is an 8-position DIP switch on the back of a Standalone DATASET 2103. It is read once immediately after DNIC Sync is achieved and the operating parameters are set according to the settings, as defined in Table 10-l. When viewed from the rear the DIP switches are labelled as follows: 12345676 User accessible switches 1 o-4 Issue 1 Revision 0 March 1997
DATASET 2 100 Series Description Table 10-l DATASET 2100 Dip Switch Settings SWITCH 1 DATASET OPERATING MODE DOWN SET - PABX OPERATION UP UP DOWN DOWN DOWN UP DOWN 200 DOWN 300 , , UP 1 DOWN 1 UP 1 DOWN 1 600 DOWN UP UP UP UP UP DOWN 1200 DOWN 2400 1 DOWN 1 DOWN 1 DOWN 1 UP 1 4800 I UP DOWN DOWN UP DOWN UP 9600 DOWN UP 19200 SYNCHRONOUS MODE SWITCH 3 SWITCH 4 DOWN DOWN DOWN UP UP DOWN UP UP SYNC OPERATING MODE INTERNAL CLOCK SYSTEM CLOCK TX EXTERNAL CLOCK TX AND RX EXTERNAL CLOCK Page 1 of 2 March 1997 Issue 1 Revision 0 1 O-5
Peripheral Devices Table 1 O-l DATASET 2100 Dip Switch Settings (continued) Note: 1. PARAMETER CHANGES MUST BE FOLLOWED BY A POWER RESET. 2. ALL SWITCH PARAMETERS, EXCEPT SWITCH 1 CAN BE OVERRIDDEN BY THE PABX CDE PARAMETERS. 1 O-6 Issue 1 Revision 0 March 1997
DATASET 2 100 Series Description Standalone DATASET 2103 Description 10.9 A Standalone DATASET 2103 is packaged in a fiat case which can be placed under a standard desk telephone set. It is functionally the same as the Rack Mounted DATASET 2102 (they share the same base printed circuit board). The Standalone DATASET 2103 can be connected to the PABX using a four-wire connection; two wires connect the dataset to the Digital Line Card, and two different wires connect the telephone set Tip-Ring pair to an ONS or COV line card; it may also be connected to a Digital Line Card within the PABX by a single twisted pair (the telephone set is con- nected independently). Figure 10-l shows typical applications of a Standalone DATASET 2103 connected to a telephone set and to a personal computer or terminal, while Figure 10-2 shows a Standalone DATASET 2103. The DATASET 2103 case is 206 mm wide x 270 mm long x 35 mm high (8.1 in. x 10.6 x I .4 jr?.). Controls, Indicators, and Connectors The keys and LEDs of a Standalone DATASET 2103 are: - ATTN key - DISC key - POWER LED - READY RxD LED - DEVICE TxD LED - ASYNC The Standalone DATASET 2103 RJ-1 I modular connector pins are: Line Telephone Pin Signal Pin Signal 1 no connection I 2 data Tip 2 3 voice Tip 3 4 voice Ring 4 5 data Ring 5 6 no connection 6 no connection modem Ml voice Tip voice Ring modem MIC no connection March 1997 Issue 1 Revision 0 1 o-7
Peripheral Devices Installation WARNING: ANY CONNECTION OF THIS SET TO AN OFF PREMISE APPLICATION, AN OUT OF PLANT APPLICATION, OR TO ANY OTHER EXPOSED PLANT APPLICATION MAY RESULT IN A SAFETY HAZARD, AND/OR DEFECTIVE OPERATION, AND/OR EQUIPMENT DAMAGE. Chart 10-l Installation of a Standalone DATASET 2103 Step Action 1. Install a Standalone DATASET 2103 by placing it near its associated telephone set and data peripheral (its case is designed to lie flat on the desk under a standard telephone). 2. Complete Customer Data Entry for the system to allow the Standalone DATASET 2103 to operate with the PABX. 3. 4. Set the eight DIP switches as required for this installation. Refer to Table 1 O-l. Connect the telephone set cord to the jack marked PHONE; connect the modular telephone line cord to the jack marked LINE and to the wall or floor jack which connects to the PABX main distributing frame (MDF). The connection to the MDF is a four-wire circuit; the voice tip and ring (red and green) connect to an ONS or COV line card (depending on the type of set being used), and the Dataset Tip and Ring (yellow and black) connect to a Digital Line Card. 5. An alternative Tip and Ring wiring arrangement is: connect the telephone set through a two-wire connection via the MDF to its ONS or COV line card; connect the modular line cord (data Tip and Ring) to the jack of the Standalone DATASET 2103 marked LINE, through the MDF to its Digital Line Card in the PABX. 6. Plug the power supply into an ac outlet and its cord into the power socket on the Standalone DATASET 2103. All LEDs should flash 5 times, indicating that the dataset has passed its self-test. If this self-test does not happen, the dataset is faulty and must be replaced. Then the POWER LED comes on, to indicate that the data set is communicating with the PABX. If the POWER LED flashes, check the wiring. 7. Plug the RS-232 interconnecting cable into the RS-232 connector at the back of the Stan- dalone DATASET 03 and connect its other end to the peripheral device. When the RS-232 connector is attached, the DEVICE LED should be on, unless the device is an auto-answer device, and defined as such in CDE (usually only destination devices such as host computers are auto-answer). If the device is not auto-answer, and the DEVICE LED does not come on, make sure the device is powered on, and then use an RS-232 break-out box to verify that the device provides DTR. If the device does not provide DTR, select CDE option “RS-232 Force High” for that device. 1 O-8 Issue 1 Revision 0 March 1997
DATASET 2 100 Series Description STANDARD TELEPHONE ERMINAL OR PC DATASET 2103 STANDARD TELEPHONE DATASET 2103 cc0559 Figure 1 O-l Typical Standalone DATASET 2103 Applications March 1997 Issue 1 Revision 0 1 o-9
Peripheral Devices MODE SWITCHES DISCONNECT KEY ATTENTION KEY EEOOi3 Figure 1 O-2 Standalone DATASET 2103, Showing Connectors and Indicators 10-10 Issue 1 Revision 0 March 1997
DATASET 2100 Series Description Circuit Description 10.10 The DATASET 2100 Series circuit contains six basic blocks, as shown in Figure 10-3. The microcontroller is the central processor for the dataset; it contains two timers, the BAUD rate generator, the Universal Asynchronous Receiver Transmitter (UART) and the system High-level Data Link Control (HDLC). The switches on the data set inter- face directly to the microcontroller; this way, the firmware can override the switch settings. The serial/parallel converter converts serial data from the RS-232 port to parallel for the processor, and parallel data from the processor to serial for the RS-232 port. In asynchronous mode, the microprocessor does the conversion; in synchronous mode, shift registers and latches interface the TxD and RxD lines with the databus to the processor. The Phase Lock Loop and Clock circuits synchronize the receive data rate of the data set to the rate of the received data from the other device. The DNIC Interface Circuit provides the interface to the PABX; its clock signals operate the dataset in either set or system mode. The RS-232 Interface contains the drivers and receivers that buffer the signal lines. It also contains a loopback circuit which can connect together transmit data from the microcontroller to receive data to the microcontroller (RxD to TxD) for self-testing functions. The Power Supply receives unregulated ac voltage and rectifies it to become +I2 vdc unregulated, -12 vdc unregulated, and +5 vdc regulated for logic circuits. Power §upplies 10.11 The Standalone DATASET 2103 receives its power from a plug-in transformer which supplies 9 vat to a power connector on the back of the set. Circuitry within the data set converts this voltage to the required dc voltages. March 1997 Issue 1 Revision 0 10-l 1
Peripheral Devices RS-232 CONTROL LEADS / -t RxD w RS-232 H INTERFACE ADDRESS SERIAL/PARALLEL e DATA CONVERTER A DNIC * INTERFACE MICRO CONTROLLER PHASE LOCK, LOOP AND CLOCK MASTER CLOCK 7 l SWITCHES +I2 -12 POWER El SUPPLY +5 CC0081 10-12 Figure IO-3 Typical DATASET 2100 Series Block Diagram Issue 1 Revision 0 March 1997