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MAY 1998

MX873A

Miniature Local Mux-12

CUSTOMER SUPPORT INFORMATION

Order

toll-free

in the U.S.: Call

877-877-BBOX

(outside U.S. call

724-746-5500

)

FREE technical support 24 hours a day, 7 days a week: Call

724-746-5500

or fax

724-746-0746

Mailing address:

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site:

www.blackbox.com

• E-mail:

[email protected]

INPUT

9V-DC

TEST

POWER

SYNC LOSS

REM LOC

Содержание MX873A

Страница 1: ...77 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15...

Страница 2: ...is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever m...

Страница 3: ...o lavabo s tano mojado o cerca de una alberca etc 6 El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato el ctrico debe ser mont...

Страница 4: ...los contactos y recept culos donde salen del aparato 14 El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deber...

Страница 5: ...4 MINIATURE LOCAL MUX 12 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners...

Страница 6: ...1 1 Sub Channels 7 1 2 Main Channel 8 1 3 General 8 2 Introduction 10 2 1 General 10 2 2 Functional Description 10 2 3 Applications 11 3 Installation 14 3 1 General 14 3 2 Physical Installation 14 3...

Страница 7: ...20 4 2 Indicators 20 4 3 Operating Procedure 20 4 3 1 Powering On the Unit 20 4 3 2 Operation 21 4 3 3 Powering Off the Unit 21 4 4 Operational Field Strapping Changes 21 5 Diagnostics 22 5 1 Remote...

Страница 8: ...232 CCITT V 24 Connectors 12 RJ 45 female Number of Sub channels 12 Distortion See Table 1 1 User may select six sub channel operation for reduced distortion by internal strapping Table 1 1 Performan...

Страница 9: ...utput Format Balanced bipolar transformer isolated Output Level 6 V ptp on 100 ohms Input Resistance 110 ohms Connectors 1 RJ 45 female 1 3 General Indicators Power Local Sync Loss Remote Sync Loss Ta...

Страница 10: ...ATURE LOCAL MUX 12 Temperature 32 to 122 F 0 to 50 C Humidity Up to 95 noncondensing Power Consumption Input 110 VAC Output 200 mA 9 VDC Size 1 3 H x 4 5 W x 7 4 D 3 4 x 11 4 x 18 7 cm Weight 10 7 oz...

Страница 11: ...Description The Mux 12 has 12 sub channels that are connected by RJ 45 connectors accessible from the top panel The unit can be strapped for 6 or 12 sub channels according to the desired application...

Страница 12: ...rates Sub channel Distortion Distortion bit rate kbps 6 channel mode 12 channel mode 19 2 12 5 25 9 6 6 3 12 5 4 8 3 2 6 3 2 4 1 6 3 2 1 2 0 8 1 6 2 3 Applications The primary application of the Mux 1...

Страница 13: ...Mux 12 units may be installed in a ring type configuration as shown in Figure 2 2 At each site the unconnected channels must be bypassed by shorting TX pin to RX pin of the relevant sub channel s conn...

Страница 14: ...13 MINIATURE LOCAL MUX 12 Figure 2 2 Typical ring installation Host Terminals Terminals Miniature Local Mux 12 Miniature Local Mux 12 Miniature Local Mux 12...

Страница 15: ...o assure normal operation 3 2 Physical Installation The Mux 12 comes completely assembled and is designed to be secured to a bench or wall using screws 3 3 Site Preparation The Mux 12 is installed wit...

Страница 16: ...through the mounting brackets located at both sides of the unit 5 Connect 9 to 12 VDC from a wall mounted AC adapter into the DC jack of the Mux The POWER LED should be lit Other LEDs may be lit as we...

Страница 17: ...of 9 to 12 VDC capable of supplying at least 300 mA A miniature wall mount power supply can be used to provide the required power The power supply is connected to the Mux by a cable ending with a mini...

Страница 18: ...ar to Send Connected to RTS 107 CC 6 Data Set Ready A positive level from the Mux except when either a sync loss occurs or remote loopback is performed 109 CF 4 Receive Line A positive level Signal De...

Страница 19: ...18 MINIATURE LOCAL MUX 12 Figure 3 1 RJ 45 socket female external view 1 8...

Страница 20: ...19 MINIATURE LOCAL MUX 12 Figure 3 2 RJ 45 plug male clip at rear 1 8...

Страница 21: ...e Figure 4 1 Their functions are described in Table 4 1 Table 4 1 Indicator functions Indicator Function Power ON when unit is powered Test ON when remote Mux is performing a loopback Local Sync Loss...

Страница 22: ...ly unattended except when occasional monitoring of LED indicators is required 4 3 3 POWERING OFF THE UNIT To power off the Mux simply remove the power adapter from the AC source 4 4 Operational Field...

Страница 23: ...ngle port Mux s digital circuitry as well as both local and remote analog interfaces the main channel link and the Mux 12 s digital receiver section NOTE When either local or remote loopback test is p...

Страница 24: ...l front panel a Check that power is supplied to the unit indicators are off b Replace unit The fault is probably in the unit s power supply circuits Local SYNC LOSS and or a Check the main channel s c...

Страница 25: ...ch end of the Mux case 2 Each bracket has a pair of flanges that slide into the Mux case slots Figure A 1 Top view of mounting bracket 3 To attach the brackets hold the Mux case facing upward Slide th...

Страница 26: ...25 MINIATURE LOCAL MUX 12 Figure A 2 Before mounting the brackets Figure A 3 After mounting the brackets...

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