Dynalec MSIC (Monitor Speaker I/F Circuit) ( ) User s Manual

Transcription

1 Dynalec MSIC (Monitor Speaker I/F Circuit) ( ) User s Manual Rev 27FEB02

2 GENERAL This manual contains information concerning a description of operation for the Dynalec Monitor Speaker Interface Circuit, MSIC. The MSIC uses the resources of the DEFINITY ECS to provide the control of connections between various voice sources, such as radio channels and remotely located monitor speakers. The MSIC also provides dial access to legacy shipboard MC announcing systems such as the 1MC system. The MSIC is constructed using a TN printed wiring board format and plugs directly into a miscellaneous port board slot of a DEFINITY ECS carrier. Power to operate the MSIC board is provided by the DEFINITY ECS carrier. The MSIC board contains the necessary circuitry to control the connection of six analog voice sources to six external monitor speakers. Each of the six circuits requires interconnection to two analog station lines in the DEFINITY ECS and to one external monitor speaker. The sixth circuit on the MSIC board is equipped with a set of relay contacts for use with MC announcing systems requiring a push-to-talk (PTT) contact closure. Although the MSIC board is mounted in a DEFINITY ECS carrier, the MSIC board operates without interaction with the DEFINITY ECS TDM/LAN busses or system software. This means that the board will not be recognized by the DEFINITY ECS system and will appear as a vacant slot for DEFINITY ECS system administration purposes. The interfaces to the MSIC appear in the main cross-connect wiring field via the existing standard 25 pair cabling between the DEFINITY ECS carrier slot and the main cross connect wiring field. THEORY OF OPERATION FOR SPEAKER CONTROL APPLICATIONS The new TN format MSIC printed wiring board controls up to six monitor speakers. Each radio monitor speaker interface is paired up with two DEFINITY ECS analog station lines. The first line, referred to as Line A, is used to establish and hold a connection via the DEFINITY ECS between a voice source (such as a radio frequency) and a remote monitor speaker. The second line, referred to as Line B, is used to force the DEFINITY ECS to disconnect the voice source from the speaker connected to Line A. Operationally, the MSIC is an incoming only circuit which can not originate a call to the DEFINITY ECS. The MSIC detects an incoming call from station Line A in the DEFINITY ECS and responds by placing a loop closure across the tip and ring conductors of that line. This operation is similar to that of an auto-answer speakerphone. No talk battery is provided on the pair connecting to the monitor speaker. FIGURE 1 shows a functional block diagram of MSIC and its functional relationship to the DEFINITY ECS. Monitor speakers can be controlled from any telephone set (with the proper class of service) within the DEFINITY ECS system. To activate a monitor speaker, a controlling station dials the telephone number or trunk access code of a voice source to be monitored, such as a meet-me conference in a DCSS conference bridge. The controlling station then uses the DEFINITY ECS conference feature to establish a three-way conference between itself, the voice source to be monitored and the desired monitor speaker connected to Line A. The controlling station then disconnects from the conference, leaving the voice source connected to the monitor speaker via Line A in the MSIC.

3 Disconnect Dual Line Operation To initiate a disconnect of the monitor speaker from the voice source, the controlling station dials the number of station Line B connected to the MSIC circuit. The MSIC circuitry detects ringing on Line B from the DEFINITY ECS and responds by placing a loop closure across the tip and ring conductors of that line. During the off-hook period, the MSIC transmits a short confirmation tone to the controlling station on Line B and opens the loop toward the DEFINITY ECS on Line A. The DEFINITY ECS responds to the loss of loop current in Line A by removing the connection between the voice source and the monitor speaker attached to Line A. At the conclusion of this process, both lines A and B are in the idle (on-hook) condition. Disconnect - Single Line Operation An alternate means of disconnecting a monitor speaker from a voice source is through the use of the forward disconnect feature built into the DEFINITY ECS. A forward disconnect is defined as the removal of talk battery by the DEFINITY ECS from the tip/ring conductors of a line for a period of approximately 600 milliseconds. The removal of the battery source results in the momentary loss of loop current to that line. The single line disconnect scheme is used only for those cases where the controlling station remains in the call and retains supervisory control of Line A through the DEFINITY ECS. For example, the controlling station places a call directly to a monitor speaker (or to an announcing system) via Line A in a MSIC circuit (see FIGURE 2). At the conclusion of the announcement, the controlling station disconnects from the call. The DEFINITY ECS detects the disconnection of the controlling station and issues a forward disconnect signal toward Line A in the MSIC (which is connected to the speaker or announcing system). The MSIC circuitry connected to Line A detects the 600 millisecond loss of loop current and responds by placing the Line A interface back in the on-hook condition. The MSIC also opens the transmission path from Line A to the speaker or announcing system and reconnects the idle circuit termination toward the speaker. FRONT PANEL INDICATIONS Upon power-up, the LED s on the front panel of the MSIC go through a test sequence in which each LED is illuminated briefly to confirm proper operation. After this power-up sequence, the bottom-most LED blinks periodically to indicate proper operation of the system controller. The 6 upper LED s represent each of the six A lines that the MSIC can interface with. If an LED is illuminated, the corresponding A line is in the off-hook condition and is connected to some remote audio source. The upper-most LED represents A line 1 and the LED which is second from the bottom represents A line 6. The corresponding LED will be extinguished when the corresponding A line is returned to the on-hook condition (using one of the two disconnect methods described above). 1MC ANNOUNCING SYSTEM CONTROL The last circuit (line 6) on the MSIC board may be used for either monitor speaker control applications or as an interface between the DEFINITY ECS and a 1MC announcing system. The last circuit differs from the other circuits on the MSIC board in that the last circuit is equipped with a relay contact for use with announcing systems requiring a PTT contact closure. This relay is operated while Line A of the last circuit on the MSIC board is in the off-hook condition. For 1MC applications, only the Line A is connected to the DEFINITY. Line B remains unterminated. Line A is activated and cut through as described above. The PTT relay in the MSIC operates while Line A is in the off-hook condition. The release sequence for Line A is initiated when the MSIC receives a forward disconnect signal from the DEFINITY ECS as described above.

4 CIRCUIT VOLUME CONTROL The MSIC has a gain from each A Line to its associated monitor speaker which is adjustable to one of 8 different levels. There are 6 DIP-switches along the top edge of the board labeled S1-S6. Each one of these 3-position DIPswitches corresponds to an A Line. The table below illustrates the 8 different volume levels which can be obtained by adjusting the DIP-switch settings. Note that a 0 refers to a DIP-switch in the DOWN position and a 1 refers to a DIP-switch in the UP position. The left-most DIP-switch also corresponds to the left-most digit in the table. TABLE 1 DIP-switch Setting Line to Monitor Speaker Gain Monitor Speaker Level dB 8.7mVrms dB 13.8mVrms dB 43.6mVrms 011 0dB 138mVrms dB 245mVrms dB 436mVrms dB 775mVrms dB 1.38Vrms

5 PINOUT INFORMATION FOR CARD EDGE CONNECTOR The following table provides a listing of the required wiring connections to the card edge connector for all inputs and outputs to the MSIC board. The two columns at the left side of the table provide wiring information for the MSIC board interface in the main cross-connect wiring field. 25 Pair Cable Wiring at Main Cross Connect Wiring Field 25 Pair Cable Color Code MSIC Card Edge Connector Pin Number TABLE 2 Terminal Designation Functional Assignment or Pin Sequencing 1 BL-W 002 R-1A Circuit 1 Setup Line A 26 W-BL 102 T-1A Circuit 1 Setup Line A 2 O-W 003 R-1B Circuit 1 Release Line B 27 W-O 103 T-1B Circuit 1 Release Line B 3 G-W 004 R-MS1 Monitor Speaker 1 28 W-G 104 T-MS1 Monitor Speaker 1 4 BR-W 005 R-2A Circuit 2 Setup Line A 29 W-BR 105 T-2A Circuit 2 Setup Line A 5 SL-W 006 R-2B Circuit 2 Release Line B 30 W-SL 106 T-2B Circuit 2 Release Line B 6 BL-R 007 R-MS2 Monitor Speaker 2 31 R-BL 107 T-MS2 Monitor Speaker 2 7 O-R 008 R-3A Circuit 3 Setup Line A 32 R-O 108 T-3A Circuit 3 Setup Line A 8 G-R 009 R-3B Circuit 3 Release Line B 33 R-G 109 T-3B Circuit 3 Release Line B 9 BR-R 010 R-MS3 Monitor Speaker 3 34 R-BR 110 T-MS3 Monitor Speaker 3 10 S-R 011 R-4A Circuit 4 Setup Line A 35 R-S 111 T-4A Circuit 4 Setup Line A 11 BL-BK 012 R-4B Circuit 4 Release Line B 36 BK-BL 112 T-4B Circuit 4 Release Line B 12 O-BK 013 R-MS4 Monitor Speaker 4 37 BK-O 113 T-MS4 Monitor Speaker 4 13 G-BK 202 R-5A Circuit 5 Setup Line A 38 BK-G 302 T-5A Circuit 5 Setup Line A 14 BR-BK 203 R-5B Circuit 5 Release Line B 39 BK-BR 303 T-5B Circuit 5 Release Line B 15 S-BK 204 R-MS5 Monitor Speaker 5 40 BK-S 304 T-MS5 Monitor Speaker 5 16 BL-Y 205 R-6A Circuit 6 Setup Line A 41 Y-BL 305 T-6A Circuit 6 Setup Line A 17 O-Y 206 R-6B Circuit 6 Release Line B 42 Y-O 306 T-6B Circuit 6 Release Line B 18 G-Y 207 R-MS6 Monitor Speaker 6 43 Y-G 307 T-MS6 Monitor Speaker 6 19 BR-Y 208 PTT-6 Push to Talk Line 6 44 Y-BR 308 PTT-6 Push to Talk Line 6

6 25 Pair Cable Wiring at Main Cross Connect Wiring Field 25 Pair Cable Color Code MSIC Card Edge Connector Pin Number Terminal Designation Functional Assignment or Pin Sequencing Volts Volts Volts Volts Volts Standard Make Contact Volts Standard Make Contact Volts Volts Volts Volts Volts Volts Volts Volts Volts Volts Volts Standard Make Contact Volts Volts Standard Make Contact Volts Volts Standard Make Contact Volts Volts Volts Volts Volts Volts Volts 200 Ground Early Make Contact 300 Ground Early Make Contact 035 Ground 037 Ground 040 Ground 042 Ground 044 Ground 046 Ground 049 Ground 051 Ground 053 Ground 134 Ground 136 Ground 138 Ground 223 Ground 224 Ground 232 Ground 233 Ground 234 Ground 235 Ground 236 Ground 237 Ground 238 Ground 239 Ground 240 Ground 241 Ground 242 Ground 243 Ground 244 Ground 245 Ground

7 25 Pair Cable Wiring at Main Cross Connect Wiring Field 25 Pair Cable Color Code MSIC Card Edge Connector Pin Number Terminal Designation Functional Assignment or Pin Sequencing 246 Ground 247 Ground 248 Ground 249 Ground 250 Ground 251 Ground 252 Ground 253 Ground 254 Ground 255 Ground 256 Ground 323 Ground 324 Ground 332 Ground 333 Ground 355 Ground 356 Ground

8 SYSTEM BLOCK DIAGRAM SPEAKER INTERFACE CIRCUIT (MSIC) TYPICAL CONTROLLING ANY (ANALOG, DCP OR ANALOG) DEFINITY ECS STEP 1 STEP 2 STEP 3 OR TRUNK MAIN CROSS-CONNECT WIRING FIELD AUDIO SOURCE SHIPS CABLE OR AUDIO SOURCE TO BE ED SUCH AS DCSS RADIO NET STEP 4 THE MSIC IS A TN FORMAT BOARD MOUNTED IN AND POWERED BY THE DEFINITY, BUT HAS NO INTERNAL CONNECTION TO THE DEFINITY TDM/LAN BUS ANALOG (SIX TOTAL ASSOCIATED WITH AUDIO PATHS TO SIX SPEAKERS) ANALOG (SIX TOTAL USED TO FORCE A RELEASE OF INDIVIDUAL SPEAKERS) SB AM SPEAKER INTERFACE CIRCUIT (MSIC) AUDIO CONNECTION TO MSIC ( 1 OF AN INDIVIDUAL SPEAKER CIRCUIT) MSIC RELEASE CONTROL ( 2 OF AN INDIVIDUAL SPEAKER CIRCUIT) AUDIO OUTPUT CONNECTIONS TO SIX SPEAKERS SEQUENCE OF OPERATION FOR ESTABLISHING AND RELEASING A SPEAKER CONNNECTION 1 - The controlling station dials the station or trunk connected to the audio source to be monitored. 2 - The controlling station depresses the CONFERENCE button and dials the analog station assigned to the desired monitor speaker. The controlling station depresses the CONFERENCE button again, establishing a three-way conference. 3 - The controlling station hangs up, leaving the audio source line or trunk conferenced to the monitor speaker line. 4 - To disconnect the monitor speaker from the audio source, the controlling station dials the number of second analog line, which forces a disconnect of the conference connection established above. SHIPS CABLE AMPLIFIER NO. 1 SHIPBRD\CVN76\MSIC-1 REV 0 1/29/01 FIGURE 1 AMPLIFIER NO. 6

9 TYPICAL CONTROLLING ANY (ANALOG, DCP OR ANALOG) SYSTEM BLOCK DIAGRAM SPEAKER INTERFACE CIRCUIT (MSIC) 1MC ANNOUNCING SYSTEM INTERFACE DEFINITY ECS MAIN CROSS-CONNECT WIRING FIELD SEQUENCE OF OPERATION FOR ESTABLISHING AND RELEASING A 1MC ANNOUNCING SYSTEM CONNNECTION 1 - The controlling station dials the number of the station line connected to the 1MC announcing system (the six circuit on the MSIC board). ANALOG 2- The MSIC detects the ringing signal from the DEFINITY and goes off-hook toward the DEFINITY line circuit. The MSIC also closes a PTT contact toward the 1MC announcing system and establishes an audio path between the DEFINITY line and the announcing system. AUDIO CONNECTION TO MSIC ( 1 OF LAST CIRCUIT ON MSIC BOARD) 3 - The controlling station makes the desired announcement and then disconnects from the call. The DEFINITY responds to the disconnect of the controlling station by issuing a FORWARD DISCONNECT signal toward the MSIC. 5 - The MSIC detects the froward disconnect signal, goes on-hook toward the DEFINITY and removes the PTT closure toward the announcing system. The audio path from the DEFINITY to the announcing system is also removed and the circuit is returned to the idle condition. THE MSIC IS A TN FORMAT BOARD MOUNTED IN AND POWERED BY THE DEFINITY, BUT HAS NO INTERNAL CONNECTION TO THE DEFINITY TDM/LAN BUS SB AM SPEAKER INTERFACE CIRCUIT (MSIC) AUDIO AND PTT CONNECTIONS TO 1MC ANNOUNCING SYSTEM SHIPS CABLE 1MC ANNOUNCING SYSTEM SHIPBRD\CVN76\MSIC-2 REV 0 1/29/01 FIGURE 2