PSB8510

PSB8510-X SIEMENS | Alldatasheet

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Technical content

Programmable Dialing Circuit (PDC) PSB 8510-X Preliminary Data CMOS IC Type Ordering Code Package PSB 8510-1 Q67100-H8327 P-DIP-20 PSB 8510-2 Q67100-H8438 P-DIP-20 PSB 8510-4 Q67100-H8627 P-DIP-20 PSB 8510-6 Q67100-H6066 P-DIP-20 This is a general description of the pulse/tone dialer family PSB 8510-X with an overview on the present versions. Detailed information on each of these versions is also available. The digital signaling generator PSB 8510-X is specifically designed to implement dual tone multifrequency (DTMF) and pulse dialing (PD) in a telephone set. The device can be connected directly to a standard push button keyboard (single contact matrix, type x-y) with up to 20 buttons (depending on the version). It works together with an integrated speech circuit (e.g. PSB 4500/01, PSB 4505/06). Redial allows comfortable dialing. The PSB 8510-X is a highly flexible device realized by pin selectable and mask programmable functions. @ Mask programmable: — All timings in steps of 1 ms up to 6 s (eg. timing of DTMF and PD, flash and line grounding) — Function of the selecting pins — Special features (telephone sets for PBX/key systems) @ Pin selectable: — Access pause generation and timing — Default dialing mode and PD timing (different break/make ratios) — Different sets of timings All possibilities of selecting features and timings are given in the chapter "Timing Para- meters of the Present Versions” 863

Features

@ Advanced CMOS technology @ Pulse (PD) and dual tone multi frequency (DTMF) dialing on chip @ Mixed dial and redial (pulse/DTMF) @ Selection of default dial mode (PD or DTMF) by selecting pins @ Last number redial up to 22 digits with data retention monitoring @ Generation of 12 or 16 different frequency pairs @ DTMF output signals meet CEPT specification without external filtering @ DTMF-level is independent of supply-voltage @ Single tone generation (e.g. for testing) @ No external components except TV standard crystal or ceramic resonator (3.58 MHz) @ Keyboard wake up function allows reduced power consumption @ Automatic and/or manual access pause generation depending on the version @ Signaling key (SK) with flash function @ Mute signal to mute the speech circuit @ Special device control keys @ Supervision and control of line conditions @ Low data retention voltage (1.2 V) @ Low operation and standby current @ Internal power-on reset @ P-DIP-20 package @ P-DSO-20 package in planning Special Features (depending on the versions) @ Saved number redial or notice (scratched) function up to 22 digits with separate memory @ Last number redial up to 32 digits with data retention monitoring but without saved number redial (PSB 8520-2, PSB 8510-4) @ Special functions for PBX internal calls and register (recalls (PSB 8510-2, PSB 8510-4) @ Generation of 16 different frequency pairs with individual handling of A, B, C, D keys (PSB 8510-2, PSB 8510-4) @ Signaling key (SK) with flash and line grounding function (PSB 8510-1) @ Mask output Siemens Aktiengesellschaft B64

—_ PSB 8510-X Pin Configuration (top view) CI Y4(PSB85S10-2,-4) v3[h1 201} p 3 (psBast0-1,-6) y2[]2 wf]ys yi{}3 ya[]x1 osca[]4 a ]x2 osc2[[s5psp_ 16[]x3 (PSB 8510-1) Mask L]7 vw} ]mute Tone [| 13[ | Flash /Pulse Mask (PSB 8510-2,~4,-6) pals 121 Vine grounding (PSB 8510-1) Yoo [}10 nt] Ks Siemens Aktiengesellschaft 865

Pin Definitions and Functions Pin No. | Symbot Function 1 Y3

2 Y2 Keyboard interface columns

4 osc 1 Connections for crystal or ceramic resonator

5 OSC 2

6 Hook-Switch/Chip enable

7 PO Selecting pin (PSB 8510-2, -4, -6)

7 Mask Mask output (PSB 8510-1)

9 [re | Selecting pin

10 Positive supply voltage

12 Line GND Line grounding output (PSB 8510-1)

12 Mask Mask output (PSB 8510-2, -4, -6)

13 Flash/Pulse Flash/Pulse output (active low)

14 MUTE MUTE output (active high)

16 X3 . 17 x2 Keyboard interface rows 18 x1

19 Keyboard interface column

20 Y4 Keyboard interface column (PSB 8510-2, -4

20 Pi Selecting pin (PSB 8510-1,-6)

Siemens Aktiengesellschaft 866

• ——w TT Read/Write Y-Matrix Keyboard and TITILIIT Logie Control D/A a Logic Control Divider Timer Program Program Analog Oscillator Divider Logic Part Connections cE Selecting Tone for Crystal Inputs or Ceramic Resonator Siemens Aktiengesellschaft 867

After off hook, the device changes from standby to wake-up state. In this state only the pull up/pull down current sources for the keyboard inputs are activated. After detecting a key input signal, the oscillator starts. When the amplitude of the clock-generator is high enough to drive the logic, the oscillator current will be reduced. When there is a valid code at the inputs for longer than 6.4 ms without interruption, it will be accepted. If the first input is a dialing digit (incl. *,#) or a pause, the LNR-RAM will be reset. The dialing digit or pause will be stored. The device then starts the dialing procedure. At the same time further digits can be entered from the keyboard. They are also stored in the LNR-RAM. For the handling of a Signal Key (SK) pressure see chapter "Signaling Key Functions” After on hook, the device goes into the standby mode by performing a special procedure. Clock Generation The device contains an oscillator circuit with the needed parasitic capacitances on chip. So, to implement the oscillator function, it is only necessary to connect a standard 3.58 MHz TV crystal or an adequate ceramic resonator to the OSC1 and OSC2 pins. The oscillator starts when a row and a column input is activated. The typical start up time is approximately ims with crystal operation. if a ceramic resonator is used instead of a crystal, the dimensioning and connecting in- structions of the manufacturer should be followed. | Siemens Aktiengesellschaft 868

The device can be connected directly to a x-y matrix keyboard without mechanical pro- tection against multi-key pressure (figure 1). Internal logic prevents the transmission of illegal information if more than one key is pressed at the same time. The inputs are static after key recognition, i.e. there is no noise generation as occurs with scanned or dynamic inputs. The internal current sources allow contact resistances up to 1 kQ in the closed con- dition and down to 100 kQ in the open condition. The minimum key-closure time is 6.4 ms in the start-up condition and adapts automatically to longer bouncing times. To enable the recognition circuit for the next digit, the key contact has to be opened for more than 12 ms. It is also possible to drive the key-recognition circuit with binary input. The corresponding binary codes are given in table 1. The timing is: Valid code input for min. 6.4 ms; then ”no input signal” for min. 12 ms. Figure 1 Keyboard Connection i 18 x1 H 17 Peer Pere aa 15 ys PSB 8510-X t---—— 4,01 i a YI M = MUTE R = Redial P = Pause F = Flash S = Set PSB 8510- 1< W = Redial R = Flash and Line Grounding Siemens Aktiengesellschaft 869

Codes for X-Y-Matrix Input Y x Function § 43 2 1 43 2 1 00000 111 «41 no input signal 0 0 00 1 1811 «41 single tone 1209 Hz 0001 0 181 1 «21 single tone 1336 Hz 0 01 0 0 11441 single tone 1477 Hz o 10 00 _ 161 1 «41 single tone 1633 Hz 00000 1 1 1 «0 single tone 697 Hz 000000 11 041 single tone 770Hz 0 000 0 10411 single tone 852 Hz 00000 04144141 single tone 941 Hz 0000 1 1 $1 1 «0 key "1" o 00 0 1 1 #1 0 1 key "4” 00001 101 41 key "7" 0.00041 o 111 key "*” 0001 40 1 1 1 0 key "2” 0001 0 1 $10 1 key "5” 00041 0 1°01 «1 key "8” 0 0 01 «0 o 11441 key ,0” 0 01 0 0 1 1 1 «0 key 3” o 0 1 0 0 1 1 01 key 6” 001 0 0 1 0411 key "9” 0 0 1 0 «0 o 111 key ,,#” 1 01 0 0 0 1 1 1 0 key ,A” | 0 100 0 1 1.0 1 | key"B 0 100 0 1 0141 key ,C” | o 1 00 0 o 4141 key ,D” 1 0 0 0 0 1 1 1 40 key "M” 10000 11041 key ”R” ("S") 1 00 0 0 1 0411 key "P” ("R”) 1 000 0 o 11414 key "F” 0 0 0 1 0 0 0 0 0 clear memories 0 0 0 0 0 o 1 1 «0 TESTM (test-mode) rest not accepted Siemens Aktiengesellschaft 870

When a row and a column are connected via key, a dual tone output consisting of the appropriate low group and high group frequency is generated. A DTMF signal can be achieved within tx, after key closure when there is no switch bounce. If two or more keys are pressed at the same time, no tone will appear at the output. The DTMF signal is timed for a minimum sending time of tp; Or as long as the key is pressed. Subsequently, an Interdigital Pause (IDP) tppp is generated. Both times toryp ANd typp are Mask-programmable. The MUTE output is active (Vpp) during trys aNd toypp- Figure 2 DTMF-Dialing Key Input | oa | Osit a MUTE | | | al Tone forme the fore hal lone “oto bee tab ot ne tke: Key recognition time tormp: DTMF burst duration tone: +OTMF inter-digital pause duration Single Tone Mode A low group tone can be generated by connecting an appropriate row input (X1...X4) to ground (Vss). A high group tone can be generated by connecting an appropriate column In this mode no digits will be stored in the RAM. The generation time is as long as the inputs are connected to Vpp OF Veg (respectively). A stored dialed-number remains in the RAM. Siemens Aktiengesellschaft 871

Active Output Frequency (Hz) % Error Input Specified Actually {without Crystal Drift) x1 697 695.32731 -0.240 x2 770 773.45398 +0.448 x3 852 849.84449 —0.253 x4 941 942.97813 +0.210 Y1 1209 1207.67375 —0.110 Y2 1336 1336.64862 +0.049 Y¥3 1477 1480.37428 +0.228 Y4 1633 1638.98581 +0.365 Oscillator frequency fy74, = 3.579545 MHz Figure 3 Synthesized Output Waveforms a 0.94 083+] 067+] 0.47 — oT | is a BS oc 0.24 -0.83 -1.00 Tone Generation For the tone generation the device contains only one D/A-converter, which is designed as a special capacitor network for generating sine-waves as shown in figure 3. The converter is multiplexed to generate the two frequency groups. The two sine-waves so generated are equal in amplitude and have very low distortion. They are filtered separately by second order lowpass filters and added in the output buffer which is connected as a first order lowpass filter. The ratio of the amplitudes of the frequencies from the low and high groups depends only on the ratio of two resistors. So the DTMF output signals meet CEPT specification without external components. Siemens Aktiengesellschaft 872

When the device is in Pulse-Dialing-mode (PD), the tone output is switched to high impedance and the Flash/Pulse output works as pulse output. After a digit is read from RAM, the device first generates an Interdigital Pause (IDP) which is tip long. The Flash/Pulse output is then switched from high impedance to Vs, during the Break- time (t,). Subsequently the Flash/Pulse output is switched back to high impedance or to Vpp (depends on the version) for the Make-time (t,). Depending on the digit read from RAM, the device repeats this Break-Make cycle. During Interdigital Pause (tp,), Make- time (ty) and Break-time (tg), the MUTE output is active (Vp). The values of ts, ty, tipp aS well as the PD frequency are mask-programmable and pin- selectable. Two mask signals are possible (Mask1 or Mask2). Figure 4 Pulse Dialing Key Input 2 | [+ | wre fo || fn BC Impedance or Vog — Hi i Mosk oA ts he pala hop ty ty hop te Siemens Aktiengesellschaft 873

Configuration | 1. RAM 1st digit .. . 22nd digit 2. RAM 1st digit... 22nd digit 3. RAM (cyclic RAM) 1st digit... 8th digit Configuration II 1, RAM 1st digit... 32nd digit 2. RAM (cyclic RAM) ist digit... 8th digit Last/Saved Number Redial Last Number Redial (LNR) is possible by depressing the "Redial”-key as first key input after off hook. Then all stored digits of the LNR-RAM will be sent out. Saved Number Redial (SNR) is possible by depressing the "Mute”- and the "Redial”-key one after the other. Then all stored digits of the SNR-RAM will be sent out (valid for devices 1 with a SNR function). : After finishing the redial functions (LNR, SNR), it is possible to dial additionally an unlimited number of digits, which will be transmitted. These digits are stored in the cyclic RAM and the contents of the LNR and SNR-RAM will not be affected. In conversation mode after finishing dialing it is possible to save the last number of the j LNR-RAM into the SNR-RAM with the "Redial"-key {valid for devices with a SNR function). Access Pause Function If the telephone needs access pauses, e.g. for trunk searching or dial-tone connection, they should be stored in the RAM for redial access. The PSB 8510-X offers two possible methods of generating and storing access pauses. 1. Pause Key Function (Manual Pause) Pressing the pause-key in the dial sequence causes a pause code to be stored in the RAM. j When this code is read, dialing is interrupted for the access pause time choosen at the selecting pins. 2. Automatic Pause Function If an automatic pause function is enabled (via selecting pins, see chapter "Timing Parameters”) a defined number of pauses can be generated automatically. They are generated if the time between two key pressures is greater than e.g. 800 ms in DTMF- mode or greater than 10 ms in pulse-mode (mask-programmable, depending on requirements). Siemens Aktiengesellschaft 875

The maximum duration of an Access Pause is tap. Each access pause can be shortened via the redial-key (go-function), then the next digit will be read from RAM. During the pause-time t,p, the MUTE output is inactive. Signaling Key Functions The Signaling Key (SK) means either the flashing key or the flashing plus grounding key. If the signaling key is pressed, a SK code is written in the RAM. Reading this code, independent of dialing mode, the device generates either just a flash signal or a flash signal plus a line grounding signal simultaneously (depending on the version). During a Flash signal (f,.) the Flash/Pulse output is switched from high impedance to Ves. A loop-disconnection will be ignored by the dialer in this state. After the Flash signal (t,,) a Flash Pause (t,,,) follows. Both times t;, and tp are mask programmable and/or pin-selectable. In case of Line Grounding (t,¢) the Line Grounding output is switched from high impedance to Vpp. After the Line Grounding signal (t,,) a Line Grounding Pause (t,¢p) follows. During Line Grounding signal (t,g) the mask output is active (Vpp). The total time of flash signal and flash pause is indentical with the total time of Line Grounding signal and Line Grounding Pause (tp, + trp = tie + tigp = fsx). During this time (tx) the MUTE output is active (Vp). After the Signaling Key function (ts,) in last number redial an Access Pause with t,p can be generated before the next digit is read from RAM. Figure 6 Timing Diagram for a Signaling Key Function with Pulse Dialing (PSB 8510-1) Key Pressure s igit (PO wre | p| High I High Impedance | | [ft | in ue or pete] | Lt Grounding (LG) ig Invedarce Hy fee fee Fre Next Digit = he——el hon jext Digi tee fe —— Siemens Aktiengesellschaft 876

The MUTE output is active (Vp) while sending dial information including Interdigital Pauses (IDP) (tore + toe in DTMF and ty + ty + top in PD mode) and while Sending a Signaling Key (SK) function (ts,). During access pauses the MUTE output is not active (Ves). The mask output is active (Vp) while sending digits in PD mode (ts + ty), excluding IDP (Mask1) or including IDP (Mask2) and while sending a Line Grounding signal (tig), excluding Line Grounding Pause (tp). In conversation mode and during access pause the MUTE output can be activated by Pressing the MUTE key (M). A subsequent key input {any key) deactivates the MUTE output (Vg). It is possible to toggle the MUTE output with the MUTE key without invoking any other function. Selection and Changing of Dialing Mode The default dialing mode is choosen by the selecting pin (see chapter ”Timing Parameters”). After hooking off and depressing the first key (oscillator starts), the device checks the selecting pins and sets the default dialing mode (PD or DTMF). Changing dialing mode in off hook condition after the first key pressure by switching the selecting pins is not possible. Changing dialing mode via keyboard is possible, depending : on the version. Test Mode The device has different test modes. By connecting the inputs X2, X3 to Vo and X1, X4 as : well as all Y inputs to Vs (TESTM) and releasing them, one test mode after the other will | be activated. In each of these test modes the X/Y key-inputs work normally. In the different | modes all timings will speed up with defined factors. : Hook-Switch/Chip Enable (CE) | The device achieves reduced power consumption for data retention in power down mode, when the CE-input is low (Ves). In this mode the pull up/pull down-current sources are disconnected from the key inputs. All other inputs are inactive (standby mode). When the CE-input is high (Vpq), the row and column-inputs are enabled and the device can be started via key pressure (wake-up mode). When the device is started, it ignores line current breaks, which pull the CE-input down to Vos, for up to e.g. 240 ms. The device interrupts dialing but accepts key-inputs during that time and continues dialing when the line current is restored. Siemens Aktiengesellschatt 877

T, = —25°C to 70°C DC supply voltage | Woorves) [-05 [6 |v Operating ambient temperature Ta _ —25 °c Storage temperature Tstg -55 °C DC Characteristics Vop = 3.5 V and T, = —25°C to 70°C, unless otherwise noted Limit Values Parameter smoot [min [we | max] une Supply voltage Voo 35 6.0 Vv a) for specified DTMF-level and distortion b) for digital operation 6.0 v Operating current a) DTMF, one key pressed tone and MUTE output unloaded Vp =3.5V | Ind 1.5 mA Vop = 3.0 V 1.2 mA b) Pulse-dialing, pause or flash, no key pressed, MUTE and line Too 0.30 mA GND unloaded Current in wake-up mode Top 10 pA before first key pressure Standby current Top 1 pA CE = Veg Standby voltage Yoo Vv for data retention Siemens Aktiengesellschaft 878

PSB 8510-) DC Characteristics (cont'd) Parameter [wo | max | une Outputs MUTE, Mask H-voltage Vou 3.1 Vv L-voltage Vow Vv H-current Tou 2 | mA L-current In. 3 j_ mA Flash H-voltage You v L-voltage Vou v H-current Tou 0.5 mA L-current To 1 mA Tone Inputs Chip enable (CE) Input voltage Vin (Vpp —0.5) (Vpp +0.3) | V Me (Vgg ~0.3) (Veg +0.5) | V Input current Tn nA ae nA Selecting Pins (Pos Py, Pa) Input voltage Vin (Ypp —0.5) (Vpp +0.3) | V Ve (Vgg —0.3) (Vgg +0.5) | V Input current Tin 400 pA (during seanning) hy 400 pA (scanning completed) | /,, 1 100 nA mh ' 100 nA ee i Siemens Aktiengeselischaft 879

Parametr omeet faim ef | ue Keyboard current Trey 70 HA X connected to Y X17... X4 Input current sl pA Vy = 0-1 V Input voltage Via (Vop —0.5) (Vpp +0.3) | V Viv (gg —0.3) (Veg +0.5) | V ¥1...¥5 Input current Ty pA Vy = 2.5-3.5V Input voltage Via (Ypp —0.5) (Vpp +0.3) | V Vie (Vgs —0.3) (Veg +0.5) | V ON resistance Rey ON 1 kQ Contact ON OFF resistance Rey OFF 100 kQ Contact OFF Siemens Aktiengesellschaft 880

Ty =—25°C to 70°C Parameter [ema bsp Tone Output Small signal output impedance 06 fos [13 | KQ Output resistance R 15 30 kQ (load AC-coupled) for specified distortion (CEPT) Output Voltage (rms-values, no load) ‘Sum level Vs 426 | mV Low group ve 236 265 | 297 mV High group Ya 297 333 | 373 mv Frequency deviation F 0.448 % (without crystal tolerance) Oscillator Recommended crystal Rs 100 Q ir 96 mHy Cy 0.02 pF Cu 5 pF Set-up time ms (first key depressing to full level for DTMF) (ts0 + to + tor read-write-logic) Siemens Aktiengesellschaft 881

Present Versions of the PSB 8510-X - PSB 8510-1 PSB 8510-2 PSB 8510-4 PSB8510-6 German Bundespost Ordering Code Q67100-H8327 | Q671 00-H8438 _ Q67100-H8627 Q67100-H6066 Pins 7 Mask Select. Pin PO Select. Pin PO Select. Pin PO

12 Ground Mask Mask Mask

20 Select. Pin P1 Y4 Y4 Select. Pin P1 Keyboard 123 @ (MUTE) @O@ wue (OM 8 456 @ sep @ (Redial) 0) a

789 W) (Redial) ©©® (Pausey | OO) @®

*O# (@®) (Flashing @) ©) (Flashing) | (@) © (a) and Grounding) Memory LNR (22) LNR (32) LNR (32) LNR (22) (digits) Cyclic (8) Cyclic (8) Cyclic (8) SNR (22) Cyclic (8) @@— snr Manual Pause © ® Autom. Pause Pulse Mode max 2 | max 2 max 2 max 2 Location any | between first between first between first 3 digits 3 digits 3 digits Generation Time 10 ms 10 ms 10 ms 10 ms DTMF Mode max 1 max 2 max 2 max 2 Location any between first between first between first 3 digits 3 digits 3 digits Generation Time 1000 ms 800 ms 800 ms 800 ms Change Dialing Mode via Keyboard Default PD> DTMF Oo +O Oo O+@ Back to PD ® © or M+) ® o@+® Default DTIMF->PD | not possible @+© ®+© Back to DIMF +©® O+O Siemens Aktiengesellschaft 882

Timing Parameters of the Present Versions Timing of the PSB 8510-1 Signaling key : Flash (te,,): 80 ms i Flash pause (tep;): 420 ms i Flash (te,2): 80 ms Flash pause (t,,p2): 970 ms Line grounding (t,.¢;): 450 ms Line grounding pause {t,¢p;): 50 ms Line grounding (t,g2): 1000 ms Line grounding pause/ (t,¢p2): 50 ms Pulse-dialing (PD) Dialing Frequency: 10 Hz Interdigital pause (tp): 820 ms Tone dialing (DTMF) Minimum sending time (tone): 90 ms Interdigital pause (tpiop): 90 ms Selecting Default Break/Make Access Automatic Pins Dialing Ratio Pause Pause P1(20) | P2(9) | Mode &/ty (ms) bpls : 0 0 PD 60/40 - no x 0 PD 60/40 3 yes 1 0 PD 60/40 1.8 yes 0 1 PD 66.7/33.3 - no x 1 PD 66.7/33.3 3 yes 1 1 PD 66.7/33.3 1.8 yes ie) x DTMF - - no x x DTMF - 3 yes 1 x DTMF - 18 yes 0 = Pin connected to Vs, 1 = Pin connected to Vp5 x = Pin not connected Siemens Aktiengeselischaft 883

Timings of the PSB 8510-2 and the PSB 8510-4 PSB 8510-2 | PsB 8510-4 Signaling Key Flash tr, = 600 ms te. = 80 ms Flash pause trip = 500 ms teyp = 1020 ms Pulse dialing Dialing frequency 10 Hz 10 Hz Interdigital pause tipp = 840 ms tipp = 840 ms Tone dialing Min. sending time tormr = 80 ms tormr = 80 ms Interdigital pause top = 80 ms top = 80 ms Selecting | Default | Break/ | Access | Automatic | Access | Automatic Pins Dialing Make Pause Pause Pause Pause PO | P2 Mode Ratio &yp/s typ/s (7) | (9) fo/ty (ms) x 0 PD 66.7/33.3 4 no no 0 0 PD 66.7/33.3 4 yes 6 yes 1 0 PD 66.7/33.3 3 yes 3 yes x x PD 60/40 4 no no 0 x PD 60/40 4 yes 6 yes 1 x PD 60/40 3 yes 3 yes x 1 DTMF 4 no no O 1 OTMF 4 yes 6 yes 1 1 DTMF 3 yes 3 yes 0 = Pin connected to Ves 1 = Pin connected to Vpp : x = Pin not connected | Siemens Aktiengeselischaft 884

a PSB 8510-X eee Timing of the PSB 8510-6 Signaling Key Flash (t)): see table Flash pause (tr, p): 50 ms Pulse dialing (PD) Dialing frequency: see table Interdigital pause (top): see table Tone dialing (OTMF) Minimum sending time (tpry,): 90 ms Interdigital pause (tpipp): 90 ms Access pause (tap) after flash: 500 ms Access pause changing dial mode: 4s Selecting Default PD Break/ PD Flash Automatic Pins Dialing Frequency | Make Ratio| Inter- &, (ms) Pause Mode toy digital PD DTMF | PD DTME PO P2 P1 Pause ()_ (3) (20) (Hz) (ms) Sop (ms) x xX xX DTMF 10 66.7:33.3 | 800 300 80 no yes x 1 x DTMF 10 66.7:33.3 | 800 300 80 no no 1 ox x PD 10 66.7:33.3 | 800 no no 1 1 x PD 10 66.7:33.3 | 800 yes no x oO x PD 10 60:40 800 no no Oo x x PD 10 60:40 800 yes no o Oo x PD 16 60:40 500 yes no Oo 1 x PD 18 60:40 440 yes no 1 Oo x PD 16 66.7:33.3 | 500 yes no x x 4 OTMF 10 66.7:33.3 | 800 300 120 no no x 1 1 DTMF 10 66.7:33.3 | 800 300 120 no yes 1 x 1 DTMF 10 66.7:33.3 | 800 300 180 no no 1 1 1 DTMF 10 66.7:33.3 | 800 300 180 no yes x O17 PD 10 66.7:33.3 | 800 no no Oo x 1 PD 10 66.7:33.3 | 800 yes no oo 1 PD 20 66.7:33.3 | 400 no no o 4 1 PD 20 66.7:33.3 | 400 yes no

1 Oo 1 PD 10 60:40 800 yes no

x x 0 DTMF 10 66.7:33.3 | 800 300 300 no no x 4 ie) DTMF 10 66.7:33.3 | 800 300 300 no yes 1 x 0 PO 10 66.7:33.3 | 800 no no 1 1°00 PD 10 66.7:33.3 | 800 yes no x 0 0 PD 16 66.7:33.3 | 500 yes no Oo x oO PD 10 60:40 800 no no o 0 0 PD 10 60:40 800 yes no o 1 0 PD 16 60:40 500 yes no

1 O O PD 18 60:40 440 yes no

" Siemens Aktiengesellschaft 885

Application Circuit (Example) . FEE sea [s[e[e[} laa, 9 = < e = = ale. wfe Pe 6 9 ge 3 3 3” | g&3 See] Epo * fe PTE | to Ue 5/ eo r : | elses ! ; Se on oe roe ° a tee | | . ap Ss | | | os phe bet ne” ee en sa een ee | seeaenic i & Sus § ot | Hip eat rare ee ee FP “ H | to! , vez! _ Ea = = om el | ESS H Siemens Aktiengesellschatt 886