xecom XE0046 high-performance quad daa module XE0046 02/98 description xecom created the XE0046 for high-performance, multi-line applications. the XE0046 integrates four high performance daa's into a single compact module. each daa circuit operates independently of all the others. like all of xecom's daa modules, the xe00046 integrates a ring detect circuit, loop current holding circuit, solid-state hookswitch, and telephone line transformer for each line. the XE0046 also provides each line with a path for the caller id signal from the telephone network and a two-to-four wire convertor. the two-to-four wire convertor separates the receive signal from the transmit signal. below is a list of the special features incorporated into the XE0046 for high-performance, multi-line applications. XE0046 features * four individual daa's in a single package; * each daa supports 33,600 bps data transfer; * each daa provides a path for the caller id signal from t he phone company central office; * each daa includes a 2/4 four wire convertor; * each daa passes network signaling up to 0 dbm without distortion. * small size: 2.5 inches long, 1.5 inches wide, and 0.6 inches high; * fcc part 68 compliant; * individual ring detection for each line; * each daa integrates a low-distortion telephone line transformer; * each daa provides a1500 volts isolation between the phone line and all other circuits; * solid-state hookswitch control for each line; XE0046 block diagram (this block diagram represents each daa within the XE0046) line transformer line current holding circuit hookswitch ring detector oh ri tip ring 2/4 wire convertor tx rx caller id
xecom (2) XE0046 XE0046 mechanical specifications a b c d e f f h g h j a 2.480 2.520 62.99 64.01 b 0.580 0.620 14.73 15.75 c 1.480 1.520 37.59 38.61 d 0.090 0.110 2.29 2.79 e 1.890 1.910 48.01 48.51 f 0.280 0.320 7.11 8.13 g 1.390 1.410 35.31 35.81 h 0.040 0.060 1.02 1.52 j 0.125 - 3.18 - inches millimeters dim min max min max notes: these dimensions reflect the module's maximum envelope. i/o pins are .025 inch square, tin-plated. warning: there are un-insulated electrical con- ductors on the underside of the XE0046. no exposed electrical conductors should be routed under the module XE0046 pin configuration vcc vdd tip1 ring1 tip2 ring2 tip3 ring3 tip4 ring4 gnd 1 2 4 6 8 10 12 14 16 18 20 tx1 rx1 oh1 /ri1 n/c tx2 rx2 oh2 /ri2 n/c tx3 rx3 oh3 /ri3 n/c tx4 rx4 oh4 /ri4 n/c 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
xecom (3) XE0046 XE0046 signal descriptions 1 vcc vcc provides the + 5 volt power source for the XE0046. 2 vdd vdd provides the -5 volt power source to the XE0046 4, 8, 10, 16 tip(n) tip provides the second connection to the telephone network (rj11 pin 3) on each of the four internal daas. tip has 1500 volts isolation from the rest of the circuitry. this isolation must be preserved throughout the system. 6, 10, 14, 18 ring(n) ring is one of two signals which form the telephone network connection (rj11 pin 4) on each of the four internal daas. the xe1046 is not sensitive to the polarity of the battery voltage on the telephone line. ring has 1500 volts isolation from the rest of the circuitry which must be preserved throughout the system. 20 gnd this signal is used as common reference for all of the control signals in the XE0046. signals on tip and ring are not referenced to ground. 21, 26, 31, 36 n/c no connect 22, 27, 32, 37 /ri(n) r ing indicate, output, active low, ttl, ri provides a half-wave representation of the ring appearing on each telephone line. 23, 28, 33, 38 oh(n) hook-switch relay control an active high input. a high on oh closes the internal relay within each daa and connects the equipment to that telephone line. 24, 29, 34, 39 rx(n) rx is the analog output from each daa. rx is referenced to ground. the level of rx will be within 1 db of the received signal on the telephone line. 25, 30, 35, 40 tx(n) tx is the analog input to each daa. the signal level at tx will be within 1 db of the level of the transmitted signal on tip and ring. tx is referenced to ground. pin name description note: the "n" designates the daa with which the signal connects. only power and ground signals are common to all daa's.
xecom (4) XE0046 electrical specification (vcc = +5 volts ?0%, vdd = -5 volts ?0%,ta=0 to 70 deg c) icc off hook, vcc = 5.0 volts 10 15 ma idd vdd = -5.0 volts 3 5 ma transmit insertion loss 600 ohm impedance, 1000 hz -1.0 0 1.0 db receive insertion loss 600 ohm impedance, 1000 hz -1.0 0 1.0 db line impedance at 1000 hz, 540 600 660 ohms ring detect min. ac voltage between tip & 38 150 vrms sensitivity (on-hook) ring type b ringer ring detect ringing voltage of 40 vrms 100 ua peak current applied between tip & ring ring detect no ringing voltage present 10 ua idle current ring indicate output ring voltage present on tip 0.2 0.5 volts voltage & ring loop current switch on: (off-hook) 2.0 3.0 volts control voltage off: (on-hook) 0.2 0.5 volts loop current switch 15 25 ma control current loop current off-hook current draw from 0 100 ma telephone line total harmonic 1800 hz, -9 dbm signal level -85 dbm distortion caller id insertion loss hookswitch open -8.0 -6.0 -4.0 dbm parameter conditions min typ max units
xecom (5) XE0046 telephone line connection information when developing a product to be connected to the telephone line, it is necessary to use a circuit described as a data access arrangement (daa) which is approved by the appropriate governmental agency. in the us, for example, this agency is the federal communications commission (fcc), while in canada it is industry canada. these agencies test and approve the product to ensure that it meets their specifications, thereby protecting the telephone system from damage and protecting the user from high voltage transients (such as lightning strikes) which may come down the telephone line. the XE0046 has been designed to meet fcc part 68 requirements for hazardous voltage, surge protection and leakage current. if the system transmits data, or dtmf tones on the telephone line, the user must certify that these transmitted signals meet fcc requirements for maximum transmission levels of out of band energy and billing delay. full details may be obtained from the fcc under part 68 of the fcc rules and regulations, or in title 47 of the code of federal regulations, however the basic requirements are as follows: 1. maximum transmit level for the normal ?ermissive?(standard) telephone line, equipment which transmits data (such as a modem) must not exceed a transmission level of -9 dbm. 2. out of band energy data equipment must not transmit ?ut of band?energy on the telephone line which exceeds the following limits: frequency range max. power 200hz to 3990hz -9 dbm 3990hz to 4005hz -27 dbm 4005hz to 16khz -16 dbm 8khz to 94khz -47 dbm 86khz to 270khz -46 dbm 270khz to 6mhz -6 dbm 3. dtmf transmission level if the system is capable of dtmf dialing, the maximum dtmf transmission level must be less than 0 dbm averaged over a 3 second interval. 4. billing delay a delay of 2 seconds or greater is required after the time the XE0046 is taken ?ff hook?and before any information is transmitted. this is required to ensure that billing information may be exchanged between telephone company central offices without interference. the user of the XE0046 must certify to the fcc that the final system meets the requirements of part 68 which include the criteria above as well as the high voltage isolation provided by the XE0046. this is generally accomplished through an independent testing lab which test the system and submits the proper paperwork to the fcc for approval. since the XE0046 already complies with fcc part 68 rules, this is a relatively simple proces s.
xecom XE0046 copyright, xecom 1998 while xecom, inc. has made every effort to ensure that the information presented here is accurate, xecom will not be liable for any damages arising from errors or omission of fact. xecom reserves the right to modify specifications and/or prices without notice. product mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies. terms of sale devices sold by xecom are covered by the warranty provisions appearing in its terms of sale only. xecom makes no warranty, express, statutory, implied, or by description regarding the information set forth herein, or regarding the freedom of the described devices from patent infringement. xecom makes no warranty of merchantability or fitness for any purposes. xecom reserves the right to discontinue production and change specifications and prices at any time and without notice. this product is intended for use in normal commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing and authorization by xecom for such application. xecom assumes no responsibility for the use of any circuitry other than circuitry embodied in a xecom product. no other circuits, patents, or licenses are implied. life support policy xecom's products are not authorized for use as critical components in life support devices or systems. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions provided in the labeling, can be reasonably expected to result in significant injury to the user. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause failure of the life support device or system, or to affect its safety or effectiveness. xecom incorporated 374 turquoise street, milpitas, ca 95035 ph:408 -945 -66 40 fax: 408 - 942-1346 e-mail info@xecom.com
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