Inter-Tel GMX-48 INSTALLATION & MAINTENANCE Manual
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INSTALLATION Issue 2, May 1990 INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE FIGURE 3-5. STANDARD STATION CABLE TERMINATIONS ON THE STATION BLOCK AMPHENOL CABI F PAIR KCB & EXP* iv!M 26 1 27 2 28 3 CKT 1 + 30VDC CKTlTIP CKT 1 GND CKT 1 RING CKT 1 PRIMARY PATH CKT 1 GND” CKT 1 PRIMARY PATH CKT 1 GND” CKT 1 AUXILIARY PATH CKT 1 GND” CKT 1 AUXILIARY PATH CKT 1 GND” 29 4 30 5 31 6 W - BL BL - W w-o 0 - w W-G G - w W - BR BR- W w - S s-w R - BL BL - R CKT 2 + 3oVDc CKT2TIP CKT 2 GND CKT 2 RING CKT 2 PRIMARY PATH CKT 2 GND” CKT 2 PRIMARY PATH CKT 2 GND” CKT 2 AUXILIARY PATH CKT 2 GND” CKT 2 AUXILIARY PATH CKT 2 GND’* 32 R - 0 CKT 3 + 30VDC CKT3TIP 7 0 - R CKT 3 GND CKT 3 RING 33 R - G CKT 3 PRIMARY PATH CKT 3 GND” 8 G - R CKT 3 PRIMARY PATH CKT 3 GND’* 34 R - BR CKT 3 AUXILIARY PATH CKT 3 GND” 9 BR - R CKT 3 AUXILIARY PATH CKT 3 GND” 35 R - s CKT 4 + 30VDC CKT4TIP 10 S - R CKT 4 GND CKT 4 RING 36 BK - BL CKT 4 PRIMARY PATH CKT 4 GND” 11 BL - BK CKT 4 PRIMARY PATH CKT 4 GND” 37 BK- 0 CKI- 4 AUXILIARY PATH CKT 4 GND** 12 0 - BK CKT 4 AUXILIARY PATH CKT 4 GND” 38 BK- G CKT 5 + 30VDC CKr5TIP 13 G - BK CKT 5 GND CKT 5 RING 39 BK - BR CKT 5 PRIMARY PATH CKT 5 GND” 14 BR - BK CKT 5 PRIMARY PATH CKT 5 GND’* 40 BK- S CKT 5 AUXILIARY PATH CKT 5 GND** 15 S - BK CKT 5 AUXILIARY PATH CKT 5 GND” 41 16 42 17 43 18 44 19 45 20. 46 21 Y - BL BL - Y Y - 0 0 - Y Y - G G - Y Y - BR BR- Y Y - s s - Y V - BL BL - V CKT 6 + 3OVDC CKT6TIP CKT 6 GND CKT 6 RING CKT 6 PRIMARY PATH CKT 6 GND” CKT 6 PRIMARY PATH CKT 6 GND” CKT 6 AUXILIARY PATH CKT 6 GND” CKT 6 AUXILIARY PATH CKT 6 GND** cKT7 +3oVDc GND’* CKT 7 GND GND” CKT 7 PRIMARY PATH GND” CKT 7 PRIMARY PATH GND” CKT 7 AUXILIARY PATH GND” CKT 7 AUXILIARY PATH GND” 41 v - 0 CKT 8 + 30VDC GND” 22 0 - v CKT 8 GND GND” 48 v - G CKT 8 PRIMARY PATH + 3OVDC** 23 G - v CKT 8 PRIMARY PATH + 30VDC RET* * 49 V - BR CKT 8 AUXILIARY PATH GND” 24 BR- V CKT 8 AUXILIARY PATH GND” . 50 V - s NOT USED GND” 25 s - v NOT USED GND” * For propei keyset operation, all three pairs (power/ground, primary, and auxiliary) are required. ** Reserved for future + 3OVDC and GND applications. Page 3-12
INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE INSTALLATION Issue 2, May 1990 FIGURE 3-6. STANDARD TERMINATION OF UNUSED KEYSET CIRCUITS KCB OR EXP 1.1 1 I I I-- 1.1 I + 30VDCfi , .2 -- BRIDGING CLIPS Strap ground to pri- mary pair for unused keyset circuits 66Ml-50-TYPE BLOCK (PART OF MDF) NOTE: To later install a station instrument on an unused keyset circuit that has been termi- nated as shown above, first remove the termination strap. Page 3-13
INSTALLATION INTER-TEL PRACTICES Issue 2, May 1990 GMX-48 INSTALLATION & MAINTENANCE D. SECONDARY VOICE PATH INSTALLATION 4.13 If desired, the system can be configured to al- low 24-line keyset users to receive off-hook voice an- nounce (OHVA) calls and/or to use the simultaneous voice/data communication feature. To accomplish this, the keyset is installed on an odd-numbered sta- tion circuit (e.g., 1.1, 1.3, 1.5, etc.). Then, the follow- ing even-numbered circuit (1.2, 1.4, 1.6, etc.) is used to create a secondary voice path. NOTE: To simply place OHVA calls (from both 1Zline and 24-line keysets) or to use thestandard data communication feature (24-line keysets only), no spe- cial secondary voice path installation is necessary. However, for data communication (whether standard or simultaneous voice/data), 24-line keysets must be equipped with optional Data Port Modules. 12-line keysets cannot have Data Port Modules installed. 4.14 Although secondary voice path-equipped key- sets are installed with three-pair cable as usual, the configuration at the station block is somewhat differ- ent than the standard configuration as outlined on pages 3-9 to 3-13. In standard installations, the KSU uses the first pair for power and ground, the second pair for the primary voice path, and the third pair for auxiliary transmissions between the keyset and the KSU. (NOTE: All three pairs are required.)To create a secondary voice path, the auxiliary pair is not used; instead, the primary pair from the following even- numbered circuit is used in its place. Refer to Figures 3-7 and 3-8 on the following pages for secondary voice path terminations. 4.15 Because the primary pair of the even-num- bered circuit is used to create a secondary voice path for the preceding odd-numbered circuit, the even- numbered circuit cannot have a station instrument in- stalled on it. 4.16 If desired (and, if cabled correctly), each mod- ule can have a combination of keysets with secondary voice paths and keysets without secondary voice paths. 4.17 Follow these procedures for each secondary voice path installation: (1) Ensure that the station cables have been con- nected to the STN blocks on the MDF as out- lined on page 3-9. NOTE: Secondary voice path-equipped key- sets can only be installed on odd-numbered station circuits. (2) Using one-pair cable (or cross-connect cable), connect the primary pair of the even-num- bered station circuit to the auxiliary pair of the preceding odd-numbered station circuit. Con- nections are made on the right side of the block. (Refer to Figures 3-7 and 3-8 on the fol- lowing pages.) (3) Terminate the auxiliary pair of the even-num- bered circuit to ground as shown in Figure 3-7 on the next page. Terminations must be made on the lefr side of the block. This procedure prevents the system from trying to send system data transmissions over the auxiliary pair. (4) After performing the loop resistance tests (as described on page 3-17), attach bridging clips only in the positions indicated in Figure 3-7. The third pair of the odd-numbered circuit and the first and third pair of the even-numbered circuit will not have bridging clips installed. 4.18 Later, when the KSU is installed, each second- ary voice path keyset must have its corresponding KCB or EXP circuit strap set in the OHVA position. If a secondary voice path is not installed, the strap must be in the NORM position. (See Figure 3-16 on page 3-31 for strap locations.) A&o, each secondary voice path circuit must be designated as such in data- base programming. (Refer to PROGRAMMING, page S-49, for details.) Page 3-14
INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE INSTALLATION Issue 2, May 1990 FIGURE 3-7. STATION CABLE TERMINATIONS FOR SECONDARY VOICE PATH KEYSETS BRIDGING CLIPS TO BE INSTALLED MDF STATION BLOCK / STATION AMPHENOL CONNECTOR I STRAP UNUSED AUX PAIR TO GROUND NOTE: For proper keyset operation, all three pairs (power/ground, primary, and secondary) are required. Page 3-15
INSTALLATION INTER-TEL PRACTICES Issue 2, May 1990 GMX.48 INSTALLATION & MAINTENANCE FIGURE 3-8. STN BLOCK TERMINATIONS FOR SECONDARY VOICE PATH KEYSETS AMPHENOL CABLE PAIR KCB OR EXP 26 W - BL CKT 1 + 3oVDc 1 BL - W CKT 1 GND 27 w-o CKT 1 PRIMARY PATH 2 0 - w ‘XT 1 PRIMARY PATH 28 W - G NOT USED 3 G - W NOT USED 29 W - BR NOT USED 4 BR- W NOT USED 30 w-s CKT 1 SECONDARY PATH 5 S-W CKT 1 SECONDARY PATH 31 R - BL NOT USED 6 BL - R NOT USED 32 R - 0 CKT 3 + 3oVDc 7 0 - R CKl- 3 GND 33 R - G CKT 3 PRIMARY PATH 8 G - R CKT 3 PRIMARY PATH 34 R - BR NOT USED 9 BR- R NOT USED 35 R - S NOT USED 10 S - R NOT USED 36 BK - BL CKT 3 SECONDARY PATH 11 BL - BK CKT 3 SECONDARY PATH 37 BK- 0 NOT USED 12 0 - BK NOT USED 38 BK- G CKT 5 + 3oVDc 13 G - BK CKT 5 GND 39 BK - BR CKT 5 PRIMARY PATH 14 BR - BK CKT 5 PRIMARY PATH 40 BK- S NOT USED 15 S - BK NOT USED 41 Y - BL NOT USED 16 BL - Y NOT USED 42 Y - 0 CKT 5 SECONDARY PATH 17 0 - Y CKT 5 SECONDARY PATH 43 Y - G NOT USED 18 G - Y NOT USED 44 Y - BR CKT 7 + 3oVDc 19 BR - Y CKT 7 GND 45 Y - s CKT 7 PRIMARY PATH 20 s - Y CKT 7 PRIMARY PATH 46 V - BL NOT USED 21 BL - V NOT USED 47 v - 0 NOT USED 22 0 - v NOT USED 48 V - G CKT 7 SECONDARY PATH 23 G - V CKT 7 SECONDARY PATH 49 V - BR NOT USED 24 BR- V NOT USED 50 V - s NOT USED 25 s-v NOT USED NOTE: For proper keyset operation, all three pairs (power/ground, primary, and secondary) are required. Page 3-16
INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE INSTALLATION Issue 2, May 1990 E. STATION LOOP RESISTANCE TEST 4.19 Perform the loop resistance test for each sta- tion cable individually. (1) (2) (3) Ensure that bridging clips have not been in- stalled on the STN blocks and that the station instrument is not connected to the modular jack assembly. Repeat this test for each station cable. Place a short across the RED and GREEN wires on the modular jack assembly. (4) (9 (6) Remove the short after the test is complete. Install bridging clips on the STN blocks to complete the cable connections. At the MDF, measure the resistance across the NOTE: Do not install bridging clips on unused WHlTE/BLUE and BLUE/WHITE wires on keyset circuits that have been terminated to the right side of the STN block. The reading ground (as shown in Figure 3-6 on page 3-13). should not exceed the following limits (for For secondary voice path-equipped circuits, 24AWG wire) listed in the table below (ohm refer to Figure 3-7 on page 3-15 for proper values are the loop measurements; feet/meter bridging clip locations. Also, do not install values are the maximum one-way measure- bridging clips on the APM ground pairs (see ments from the KSU). Figure 3-4 on page 3-11). NOTE: Excessive and/or improperly made connections increase the resistance of a cable, which reduces the allowable cable run length. TYPE OF INSTRUMENT 24.Line Keysets (standard or display) 24.Line Keysets with Data Port Modules 12-Line Keysets DSS/BLF Units SLIs (AC or DC) Single-Line DTMF Sets (AC or DC) Playback Devices (AC or DC) LOOP LIMITS 65 ohms/1260 ft. (384 m.) 50 ohms/970 ft. (295 m.) 65 ohms/1260 ft. (384 m.) 65 ohms/1260 ft. (384 m.) 450 ohms/8750 ft. (2667 m.) 175 ohms/3400 ft. (1036 m.) 175 ohms/3400 ft. (1036 m.) Page 3-17
INSTALLATION Issue 2, May 1990 ‘. INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE F. CONNECTING OPTIONAL OFF-PREMISES Information on operating and adjusting the repeater STATIONS unit is included with the product. 4.20 To connect off-premises single-line stations to the system, use AC ringer-equipped SLIs or single- line DTMF sets. 4.26 Install the off-premises stations as follows (re- fer to Figure 3-9 on page 3-20): 4.21 Off-premises stations require an external High Voltage Ringing Adapter (HVRA) Unit, a 48VDC power supply, a ring generator, a 66Ml-50-type ter- minal block, and cabling. (Refer to page 2-14 for equipment requirements.) (1) Mount the HVRA Unit(s) on the MDF back- board. I a. Disassemble the HVRA Unit by removing the four base screws. b. 4.22 The HVRA Unit provides isolation from the telephone company OPX line(s) and converts the DC ringing used in the system to the AC ringing used by the off-premises stations. Each HVRA Unit allows two off-premises stations to access the single-line fea- tures. Multiple HVRA Units may be installed, if de- sired. Insert two mounting screws through the holes in the top of the HVRA Unit and screw the HVRA Unit top to the MDF backboard. (Some units do not have these holes and drilling is required.) C. Reassemble the HVRA Unit on the MDF backboard. 4.23 As many as six off-premises stations can con- nected to each APM. Each off-premises station cir- cuit on the APM must have the AC/DC strap set for DC ringing to allow an external HVRA to be in- stalled. (NOTE: AC ringing will damage the HVRA.) Set the strap for each off-premises station circuit in the DC position before installing the APM. (Figure 3-18 on page 3-36 shows the circuit straps.) (2) Mount a 66Ml-50-type terminal block on the MDF backboard near the HVRA Unit. (3) Connect the HVRA Unit to the MDF back- board as follows: NOTE: The FCC requires that an external HVRA Unit be installed when connecting an off-premises station. The APM onboard HVRA (AC setting) may not be used. Using enough 25-pair cable to run from the HVRA Unit to the MDF location, attach a 50-pin female amphenol-type connector to one end of the cable. Label the connector “HVRA”. Terminate the other end of the 25-pair cable on the Zefl side of the HVRA block. 4.24 In certain off-premises applications, voice vol- ume levels may not be acceptable. This degradation in voice volume is due to the natural voice frequency range limitations of the telephone company or cus- tomer-provided line. To increase the voice frequency range, installation of a 2-wire, negative impedance re- peater unit is recommended. (Refer to page 2-14 for recommendations and specifications.) Attach the connector on the cable to the male connector on the HVRA Unit. (4) Mount the power supply and ring generator on the MDF backboard. (5) Connect the power supply and ring generator to the right side of the HVRA connecting block. Refer to Figure 3-9 on page 3-20. 4.25 The repeater unit is installed at the MDF be- tween the HVRA Unit and the cabling to the off- premises single-line station. For proper installation with the GMX-48 System, the following are con- nected to the appropriate “pins” on the repeater unit (refer to the manufacturer’s instructions for proper pin locations): -Battery (-24 to -56VDC), Ground, System Tip, System Ring, OPX Tip, and OPX Ring. (6) Attach a length of 10AWG wire to the -48VDC return terminal (+ side) on the pow- er supply. Connect the other end to the grounding terminal on the MDF backboard (refer to Figure 3-9, aitd see the grounding re- quirements on page 3-26). (7) Use cross-connect cable(s) to connect the APM block to the HVRA block as follows: Page 3-18 ’
INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE INSTALLATION Issue 2, May 1990 a. b. Terminate one end of the cross-connect cable on the right side of the APM block on the pins associated with the off-premises station’s circuit. Terminate the other end of the cross-con- nect cable on the right side of the HVRA block on the W/BL or R/BL pairs (depend- ing on the HVRA circuit being used). NOTE: Be sure tip and ring connections are made as shown in Figure 3-9. Revers- ing tip and ring on the AF’M block causes the off-premises station to ring continu- ously. (8) Terminate the telephone company OPX line(s) or customer-provided line(s) on the right side of the HVRA block. ’ NOTE: Be sure that tip and ring connections are made as shown in Figure 3-9. Reversing tip and ring on the OPX line inhibits the station from ringing. (9) Install bridging clips on the HVRA and APM blocks to complete the connection. Page 3-19
INSTALLATION Issue 2, May 1990 ‘. INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE FIGURE 3-9. HVRA CONNECTION TO THE MDF HVRA TERMINAL BLOCK OPX (7) LINE FROM APM TERMINAL BLOCK ---- _--- ---- UNIT -1 HVRA u _--- ---- ---- ---- ---- ---- ---- ---- ---- ---- Page 3-20
INTER-TEL PRACTICES GMX-48 INSTALLATION & MAINTENANCE ‘.. INSTALLATION Issue 2, May 1990 5. 5.1 TERMINATING C.O. LINES AT THE MDF The installation procedure used to terminate C.O. lines at the MDF is dependent on the type of termination used by the telephone company and how close it is to the MDF. The C.O. lines may be termi- nated on RJ-type jacks or on an RJ-type block. 5.2 Follow one of the three C.O. termination meth- ods (A, B, or C) outlined on the following pages. IMPORTANT NOTES: The first C.O. jack on the KSU Control Board (KCB) connects lines 1 and 2, while the second C.O. jack connects lines 3 and 4. The first C.O. jack on the first Expansion Module (EXP) con- nects lines 5 and 6, while the second C.O. jack connects lines 7 and 8. The first C.O. jack on the second EXP connects lines 9 and 10, and so on. Lines are normally connected in this sequence. For example, if three lines are installed, lines 1 and 2 would terminate on the first C.O. jack, and line 3 would terminate on the second C.O. jack. For additional lightning protection, install gas dis- charge tubes with silicon avalanche suppressors to ground on each C.O. and OPX line. This must be done external to the system. Each gas discharge tube is installed directly between the telephone company termination and the C.O. modular jack assemblies mounted next to the KSU. This pro- tection should give energy absorption and filter low-level surge potentials on the C.O./OPX lines. If C.O. termination method A (direct KSU con- nection) is used, gas discharge tubes cannot be in- stalled; use method B instead. Also, in areas with frequent occurrences of lightning, it is recom- mended that the cable between the telephone company termination and the gas discharge tubes be at least 75 feet long (the cable may be coiled up if desired). A. C.O. LINES TERMINATED ON RJ-TYPE JACKS NEAR THE MDF 5.3 Before using this procedure, read the IMPOR- TANTNOTES following paragraph 5.2. Plug one end of a two-pair mod-to-mod line cord into each tele- phone company RJ-type jack. The other end will later be plugged into a C.O. jack on the KSU. B. C.O. LINES TERMINATED ON RJ-TYPE JACKS AWAY FROM THE MDF 5.4 Before using this procedure, read the IMPOR- TANTNOTES following paragraph 5.2. Also, refer to Figure 3-10 on the next page for a diagram of the complete layout. . (1) Mount one four-conductor modular jack as- sembly next to each telephone company RJ- type jack. (2) For each modular jack assembly mounted in step 1, also mount a corresponding four-con- ductor modular jack assembly on the MDF backboard. (3) To connect the modular jack assemblies mounted in steps 1 and 2: a. Run two-pair cable between the corre- sponding modular jack assemblies. b. Wire each end of the two-pair cables onto their respective modular jack assemblies. Refer to Figure 3-11 on the next page for a diagram of the wiring. (4) Plug one end of a two-pair mod-to-mod line cord into each RJ-type jack and plug the other end into the corresponding modular jack as- sembly beside it. (5) At the MDF backboard, plug one end of a two- pair mod-to-mod line cord into each modular jack assembly. The other end will her be plugged into a C.O. jack on the KSU. Page 3-21