Inter-Tel Inside Track User Guide Issue 2
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Chapter 2— Equipment Requirements 23 Inside Track User Guide Control and Status Pins (requirements vary among manufacturers) There are NO standard rules for connecting control and status pins because manufacturers of RS-232 devices have altered the use of these pins with time. There is a lack of consis- tency among manufacturers as to which pins are used under different conditions, and how the pins are implemented. For that reason, Inter-Tel can only provide some general guide- lines on how to connect these pins. There can be anywhere from 0 to 6 control and status pins depending on how many of these pins a manufacturer wishes to include: DB25RS-232 DescriptionSignal Direction Pin-4RTS-Request To Send“Flow Control Out” from aDTE; “Flow Control In” to aDCE- see Note below Pin-5CTS-Clear To Send“Flow Control In” to aDTE; “Flow Control Out” from aDCE Pin-6DSR-Data Set Ready“Device Status In” to aDTE; “Device Status Out” from aDCE Pin-20DTR-Data Terminal Ready“Device Status Out” from aDTE; “Device Status In” to aDCE Pin-8DCD-Data Carrier Detect“Carrier Status In” to aDTE; “Carrier Status Out” from aModem Pin-22RI-Ring Indicator“Ring Status In” to aDTE; “Ring Status Out” from a Modem NOTE:When hardware flow control is required or implemented, the RTS pin takes on the functionality of“Ready for Receiving” per E1A/T1A-232-E. Here are the general guidelines for connecting the control and status pins: · Connecting Flow Control pins:The “Flow Control Out” of one device always con- nects to the “Flow Control In” of another device. · Connecting Device Status pins:The “Device Status Out” of one device always con- nects to the “Device Status In” of another device. · Connecting Modem Status pins:The Modem Status Out pins of one device always connects to the Modem Status In pins of the DTE. Note that sometimes the guidelines above do not always apply, for the following reasons: · Some manufacturers use DTR as a “Flow Control” signal instead of as a“Device Ready” signal.
Chapter 2— Equipment Requirements 24 Inside Track User Guide· Some manufacturers implement Flow Control in only one direction. · Some manufacturers ignore some of the signals but implement others. · Some manufacturers allow the user to select between software and hardware flow con- trol through the programming the device. To determine how to make the proper connections, read the manuals and documentation that come with each device and find out what each device does with these signals. Once you know that, you can then determine which signals get connected and which can be left unconnected. Keep in mind that RS-232 was designed so that when a DTE connector mates with a DCE connector, a“straight through” cable can be used. If you connect a DTE connector to a DCE connector using a straight through cable, then all of the control and status signals should be connected correctly. This is also true when the DCE is a modem and the DTE is a PC or a terminal. Whenever the DCE is something other than a modem, do not assume that a straight-through cable will always work. In cases where a DTE connector mates with a DTE connector (e.g., a PC-to-PC connec- tion), or in the case where a DCE connector mates with a DCE connector (e.g., an Axxent Serial port and a modem), a “null modem” adapter is probably needed so that the “Out” pins of one device always connect to the “In” pins of the other device. (Unfortunately, there several different “null modem” adapter wiring configurations available and choos- ing which one works in your particular case can be difficult.) In general, you must review the documentation provided by the manufacturer of each device’s RS-232 connector and determine the following: · Which control and status signals are used and which are left unconnected. · For those control and status signals that are used, you must know how they are imple- mented by the device. · You may need some type of adapter (e.g., a “null modem” adapter or perhaps your own custom adapter) to properly connect the control and status pins between the two connectors. In the case of hooking up a PC running Inside Track to other devices (buffer boxes, mo- dems, phone systems, and other PCs), you can buy or make your own cables and adapters, or, you can purchase Inter-Tel’sAXXESS/Axxent Universal RS-232 kit. The Universal RS-232 kit provides you with all of the cables and adapters you are likely to ever need for making an RS-232 connection, and, it provides you with application notes on how to make each connection.
Chapter 2— Equipment Requirements 25 Inside Track User Guide Telephone System RS-232 Connector Pin Out AXXESS RS-232 Modular Jack Pin Out Inter-Tel AXXESS RS-232 Serial Ports (except for PCDPM) use a custom pin out as shown in the diagram below. Refer to this diagram for all RS-232 connections to the serial port. 1 2 3 4 5 6 7 8 SIGNAL TYPE SIGNAL DIRECTION No Connect No Connect Ground Data Input To AXXESS Flow Control Input To AXXESS* Data Output From AXXESS Device Status Output From AXXESS (always asserted) Flow Control Output From AXXESS *The serial port on the CPU-112 card (not supported by AXXESS version 5.0 or higher), does not have the Input Flow Control pin connected, but it can use the Output Flow Control pin. The two serial ports on a MEM card have both flow control pins connected; therefore, they can perform hardware flow control as the other Inter-Tel ports do.
Chapter 2— Equipment Requirements 26 Inside Track User Guide Axxent DB9F Connector Pin Out Inter-Tel Axxent systems use the de facto IBM-PC/AT industry standard DB9F (female) pinout configured as a DCE connector. Refer to the following diagram for all Axxent KSU serial port connections. 1 2 3 4 5 6 7 8 9 DB9 FemaleConnector SERIAL #1 AND SERIAL #2 DB9F CONNECTORS ON AXXENT KSU DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DCE)DB9F PIN NO. Always TrueDCDOutput from Axxent1 Output DataRDOutput from Axxent2 Input DataTDInput To Axxent3 IgnoredDTRInput To Axxent4 GroundGND5 Always TrueDSROutput from Axxent6 Input Flow ControlRTSInput To Axxent7 Output Flow ControlCTSOutput from Axxent8 Always FalseRIOutput from Axxent9
Chapter 2— Equipment Requirements 27 Inside Track User Guide PCDPM DB9F Connector Pin Out DB9F Pin Out Inter-Tel PCDPMs use the de facto IBM-PC/AT industry standard DB9F (female) pinout configured as a DCE connector. Refer to the following diagram for all PCDPM connec- tions. 1 2 3 4 5 6 7 8 9 DB9 FemaleConnector PCDPM DB9F CONNECTOR DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DCE)DB9F PIN NO. Always TrueDCDOutput from PCDPM1 Output DataRDOutput from PCDPM2 Input DataTDInput To PCDPM3 Input Flow ControlDTRInput To PCDPM4 GroundGND5 Always TrueDSROutput from PCDPM6 Input Flow Control*RTSInput To PCDPM7 Output Flow ControlCTSOutput from PCDPM8 Not SupportedRINo Connection9 *On older model PCDPMs, this input pin was a“No Connect” and not used for input flow control. New PCDPM boards are labeled with artwork number 826.5239–5 or later. For more information on PCDPM, refer to Digital Keyset PCDPM Installation Instructions (Document No. 835.1823–5).
Chapter 2— Equipment Requirements 28 Inside Track User Guide PC DB9M/DB25M Connector Pin Out DB9M Pin Out PCs use the de facto IBM-PC/AT industry standard DB9M (male) pinout configured as a DTE connector. Refer to the following diagram for all PC connections, which includes Inter-Tel AXXESSORYTalk, Axxent Talk, and PCs in general. 5 4 3 2 1 9 8 7 6 DB9 MaleConnector DB25M Pin Out PCs use the RS-232 standard DB25M pinout configured as a DTE connector. Refer to the following diagram for all PC connections. 13 12 11 10 9 25 24 23 22 8 7 6 5 4 3 2 1 21 20 19 18 17 16 15 14 DB25 MaleConnector PC RS-232 SERIAL COM PORT DB9M/DB25M CONNECTOR DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DTE)DB9M PIN NO.DB25M PIN NO. Data Carrier Detect (Modem only)DCDInput To PC18 Input DataRDInput To PC23 Output DataTDOutput From PC32 Data Terminal Ready (DTR)DTROutput From PC420 GroundGND57 Data Set Ready (DSR)DSRInput To PC66 Output Flow ControlRTS*Output From PC74 Input Flow ControlCTSInput To PC85 Ringing Indication (Modem only)RIInput To PC922 *RTS stands for“Request To Send,” but can also take on the meaning “Ready for Receiving” per EIA/TIA-232-E.
Chapter 2— Equipment Requirements 29 Inside Track User Guide Buffer Box DB25 Connector Pin Out The Buffer Box (PollCat, CRB, or ILB) has two RS-232 connectors. The connector la- beled PBX is connected to your telephone system. The connector labeled COMPUTER is connected to your PC or to an external modem. Ensure that the RS-232 cables have the correct pinouts as outlined in the diagram below. Refer to page 9, 12, or 15 for PollCat, CRB, or ILB unit specifications. DB25 Pin Out to PC The pinout for the COMPUTER RS-232 connector on the buffer box that attaches toyour PCis configured as a DCE connector as follows: SERIAL PORT DB25 CONNECTOR LABELED“COMPUTER” DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DCE)DB25 PIN NO. Input DataTDInput Data from PC2 Output DataRDOutput Data to PC3 SeeNote1CTSFlow Control Output to PC5 SeeNote2DSRDevice Ready Output to PC6 Signal GroundGND7 SeeNote3DCDOutput To PC8 SeeNote4DTRInput From PC20 Note 1:“CTS” is described as “Flow Control” for CRB, “Always True” for ILB, and not used on PollCat. Note 2:For PollCat only,“DSR” is described as “80% Full Alarm.” This is an optional connection which can be used by the computer to monitor the full condition before initiating a data transfer. Pin 6 is high if memory is over 80% full. Note 3:“DCD” is described as “Poll-Now” for CRB and ILB, but is not present on PollCat. Note 4:For PollCat only,ready signal must be high to release data. Unit will not release data until an X-ON is received after pin 20 is high. If pin 20 drops low, data output will halt. Pin 20 may be jump- ered to pin 5 on the PollCat port if the computer cannot supply a high signal level. DB25 Gender PollCatFemale CRBFemale ILBFemale Note:These conform to the RS-232 standard which specifies a female connector for a DCE connector.
Chapter 2— Equipment Requirements 30 Inside Track User Guide DB25 Pin Out to PBX The pinout for the PBX RS-232 connector on the buffer box that attaches toyour tele- phone systemis configured as a DTE connector as follows: SERIAL PORT DB25 CONNECTOR LABELED“PBX” DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DTE)DB25 PIN NO. Output DataTDOutput Data to PBX2 Input DataRDInput Data from PBX3 Signal GroundGND7 Always TrueDTROutput to PBX20 DB25 Gender PollCatMale CRBMale ILB*Female * The RS-232 standard specifies a male connector for a DTE connector. Since the ILB uses a non-standard female connector, a DB25 male/male gender changer may be required to make a successful connection to the phone system. The DB25 male-to-male gender changer can be purchased at most computer stores for a small cost.
Chapter 2— Equipment Requirements 31 Inside Track User Guide MODEM DB25F Connector Pin Out DB25F Pin Out Modems use the RS-232 standard DB25F (female) pinout configured as a DCE connector. Refer to the following diagram for all Modem connections. 1 2 3 4 5 14 15 16 17 6 7 8 9 10 11 12 13 18 19 20 21 22 23 24 25 DB25 FemaleConnector MODEM RS-232 SERIAL DB25F CONNECTOR DESCRIPTIONRS-232 EQUIVALENT PIN NAMEDIRECTION (DCE)DB25F PIN NO. Data Carrier DetectDCDOutput From Modem8 Output DataRDOutput From Modem3 Input DataTDInput To Modem2 Data Terminal ReadyDTRInput To Modem20 Signal GroundGND7 Data Set ReadyDSROutput From Modem6 Input Flow ControlRTS*Input To Modem4 Output Flow ControlCTSOutput From Modem5 Ringing IndicationRIOutput From Modem22 *RTS stands for“Request To Send”, but can also take on the meaning “Ready for Receiving” per EIA/TIA-232-E.
Chapter 2— Equipment Requirements 32 Inside Track User Guide