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| 1. | 
Model # DP5022-SD | | 5000 Series Digital Business Telephone with 4-line LCD and 10 Programmable Buttons provide Advanced Digital Speakerphone and intuitive buttons and features designed for ease of use....Read More
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$249.97
|  Detail Box
In Stock |
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| 2. | 
Model # CHSUE672-PS | | Expansion Cabinet with BPSU672A Power Supply and Battery Charger. Provides up to 10 universal slots based on installed processor....Read More
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$328.97
| Detail Box |  Info Center
In Stock |
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| 3. | 
Model # RCOS | | One per RCOU. The RCOS attaches to the RCOU to provide 4 additional Loop Start CO / PBX / Centrex line circuits. Read More
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$59.99
ON SALE NOW!
| Detail Box
Regular Price: $149.99
You Save: $90.00 (60%)
In Stock |
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| 4. | 
Model # RCOU | | Provides 4 CO/PBX/Centrex loop start lines. Maximum 1 RCOU per DK40 system. 1 for each 4 Loop Start CO / PBX / Centrex lines on DK280/DK424 systems. Accepts RCOS. Read More
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$64.97
| Detail Box
In Stock |
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| 5. | 
Model # BDKU | | Used instead of PDKU2's. Provides 8 digital station ports for connection of 3000-series or 2000-series DKTs, DSS Console, DDCB, or CTX Attendant Console. This unit has connectors for an 8-circut subassembl...Read More
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$78.38
| Detail Box
In Stock |
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| 6. | 
Model # RSTU3A | | Provides 8 standard telephone station ports. 1 port per DTMF or rotary telephone, or peripheral device such as Voice Mail, Auto Attendant, fax, etc. 1 port per off-premises station, type OL13B line. Maximu...Read More
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$167.97
| Detail Box
In Stock |
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| 7. | 
Model # RDTU2 | | Provides 24 channels for T1 Service. Network connection requires an external CSU. Each RDTU requires 1 NDTU cable. Maximum 2 per RCTUBA/BB systems. Maximum 6 per RCTUC/D system. Read More
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$204.97
| Detail Box
In Stock |
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| 8. | 
Model # BDKS1A | | Provides 8 additional digital station ports. Mounts on BDKU1A. Read More
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$399.97
| Detail Box
In Stock |
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| 9. | 
Model # RPTU1 | | Provides 23 channels for ISDN PRI service on CTX670, CTX100 or DK424i, and 12 channels for DK40i (requires R4.3). Network connection using RPTU2A PRI interface requires an external CSU. Requires RPRI-CBL-KIT. Read More
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$616.97
ON SALE NOW!
| Detail Box
Regular Price: $952.50
You Save: $335.53 (35%)
In Stock |
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| 10. | 
Model # RDSU | | 1 per 4 digital station ports plus 2 standard station ports. Mounts in Expansion KSU. Maximum 2 RDSU per DK40 system. For DK40I/DK424/DK424I/CTX100/CTX670. Read More
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$86.97
| Detail Box
In Stock |
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| 11. | 
Model # RSTS | | Standard Phone Interface Subassembly (0x0x2)....Read More
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$109.97
| Detail Box
In Stock |
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| 12. | 
Model # BSIS1A | | Provides two RS-232 serial ports with modular jacks. Required for SMDR or SMDI. Mounts on ACTU or BECU processor card. Includes 1 serial license. Additional serial port license required to activate seria...Read More
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$113.97
| Detail Box
In Stock |
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| 13. | 
Model # RDDU1 | | Provides 4 DID line circuits. Mounts in the Expansion KSU. Maximum 1 RDDU per DK40 system. 1 for each 4 DID lines on DK280/DK424/DK424i system. K4RCU3 required for DTMF operation on DK40 systems. RRC...Read More
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$119.97
ON SALE NOW!
| Detail Box
Mfg. List Price: $490.00
Regular Price: $199.97
You Save: $370.03 (76%)
In Stock |
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| 14. |
Model # RCIS1 | | 1 per RCIU. The RCIS installs piggy-back onto the RCIU to provide an additional 4 Caller ID circuits, totaling 8 per slot. CO lines are looped through the RCIS and into the RCOS. Read More
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$129.97
| Detail Box
In Stock |
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| 15. |
Model # REMU1 | | Provides 4 E&M tie line circuits (type 1 or 2, 2-wire or 4-wire). Maximum 1 REMU per DK40 system (mounts in expansion KSU). Immediate Start or Wink Start. K4RCU3 required for DTMF operation in DK40/DK40i...Read More
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$139.97
| Detail Box
In Stock |
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| 16. | 
Model # BIOU1A | | Provides four-zone paging, three MOH inputs with volume control, four control relays, background music (BGM) mute, and a 600 ohm or 3-watt amplifier page output. Maximum 2 BIOU per CTX670/100 system. Read More
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$179.97
| Detail Box
In Stock |
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| 17. | 
Model # RCIU2 | | 1 RCIU2 for each 4 loop start lines (used in conjunction with an RCOU/RCOS) or ground start lines (used in conjunction with an RGLU) to provide Caller ID. The RCIU2 accepts the RCIS subassembly. CO line...Read More
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$239.97
ON SALE NOW!
| Detail Box
Regular Price: $289.99
You Save: $50.02 (17%)
In Stock |
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| 18. |
Model # RCMS1 | | Attaches to the RMCU to provide 2 CAMA trunk circuits. Maximum 2 RCMS subassemblies per RMCU card. Requires Release 4.3 software. Read More
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$285.00
| Detail Box
In Stock |
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| 19. |
Model # RMCU1 | | Requires 1 or 2 RMCS subasssemblies to provide 2 or 4 CAMA trunk circuits. The RMCU has connectors for 2 RCMS subassemblies. Requires Release 4.3 software or higher software. Read More
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$300.00
| Detail Box
In Stock |
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| 20. |
Model # RBUS1 | | Attaches to the RBUU to provide 2 additional BRI U interfaces that can be used for station-side ISDN connections only. Requires Release 4.3 or higher and 1 Ferrite Core for each BRI line cononected t...Read More
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$310.00
| Detail Box
In Stock |
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