Showing 1825 - 1872 of 2250 products

Mitel Mitel 9109-610-001 SX-200 ML MCCIII Stratum 4 Card (Refurbished)

$51.99

Mitel Mitel 9109-610-102 SX-200 EL MCCIII Stratum 3 Card (Refurbished)

$195.00

Mitel Mitel 9109-610-002 SX-200 ML MCCIII Stratum 3 Card (Refurbished)

$195.00

Mitel Mitel 9109-110-001 SX-200 ML/EL ONS Class Line Card (12 CCT) (Refurbished)

$125.00

Mitel Mitel 9109-061-000 SX-200 Digital T1 Stratum 4 Clock Module (Refurbished)

$75.00

Mitel Mitel 9109-060-000 SX-200 Digital T1 Stratum 3 Clock Module (Refurbished)

$75.00

Mitel Mitel 9109-021-000 SX-200 Digital T1-DS1 Trunk Card (24 Channel) (Refurbished)

$55.00

Mitel Mitel 9109-031-000 SX-200 Digital DID Trunk Card (6 CCT) (Refurbished)

$41.97

Mitel Mitel 9109-025-000 SX-200 Digital Console DLIC Module (Refurbished)

$55.00

Mitel Mitel 9109-036-000 SX-200 Digital Main Control Card (Refurbished)

$52.99

Mitel Mitel 9400-100-301 SX-200 Light Peripheral FIM Carrier Card (Refurbished)

$75.00

Mitel Mitel 9109-040-000 SX-200 Digital OPS Line Card (6 CCT) (Refurbished)

$65.99

Mitel Mitel 9109-020-000 SX-200 Digital COV Line Card (6 CCT) (Refurbished)

$19.00

Mitel Mitel 9109-013-001 SX-200 Digital E&M Trunk Module (Refurbished)

$89.00

Mitel Mitel 9109-017-000 SX-200 Digital Bay Control Card (Refurbished)

$45.00

Mitel Mitel 9109-018-000 SX-200 Digital Music-On-Hold / Paging Module (Refurbished)

$48.98

Mitel Mitel 9109-016-000 SX-200 Digital DTMF Module (Refurbished)

$45.00

Mitel Mitel 9109-012-002 SX-200 Digital Line Card (12 CCT) (Refurbished)

$35.00

Mitel Mitel 9109-012-001 SX-200 Digital Line Card (12 CCT) (Refurbished)

$29.00

Mitel Mitel 9109-011-000 SX-200 Digital LS/GS Trunk Card (6 CCT) (Refurbished)

$48.88

Mitel Mitel 9109-012-000 SX-200 Digital Line Card (12 CCT) (Refurbished)

$35.00

Mitel Mitel 9109-006-000 SX-200 Digital Switch Matrix Card (Refurbished)

$59.00

Mitel Mitel 9109-002-003 SX-200 Digital 2 Meg Memory Module (Refurbished)

$119.00

Mitel Mitel 9109-005-000 SX-200 Digital Universal Card (Refurbished)

$49.00

Mitel Mitel 9109-002-005 SX-200 Digital 4 Meg Memory Module (Refurbished)

$199.00

Mitel Mitel 9109-004-000 SX-200 Digital DX Module (Refurbished)

$79.00

Mitel Mitel 9108-203-100 SX-200 Digital Peripheral Control Card (Refurbished)

$174.00

Mitel Mitel 9108-002-000 SX-200 Digital Interface Card (Refurbished)

$149.00

Mitel Mitel 9105-023-000 SX-100 Interconnect Board (Refurbished)

$225.00

Mitel Mitel 9104-041-001 SX-50 E&M Trunk Module (Refurbished)

$99.00

Mitel Mitel 9105-008-000 SX-100 Power Supply (Refurbished)

$475.00

Mitel Mitel 9104-044-001 SX-50 RMATS Module (Refurbished)

$54.95

Mitel Mitel 9104-042-001 SX-50 Music-On-Hold/Paging Module (Refurbished)

$36.95

Mitel Mitel 9104-040-000 SX-50 Universal Card (Refurbished)

$44.96

Mitel Mitel 9104-030-111 SX-50 DID/Trunk Card (8 CCT) (Refurbished)

$179.00

Mitel Mitel 9104-030-100 SX-50 LS/GS Trunk Card (4 CCT) (Refurbished)

$149.00

Mitel Mitel 9104-030-110 SX-50 DID/Trunk Card (4 CCT) (Refurbished)

$179.00

Mitel Mitel 9104-024-001 SX-50 DNIC Line Card (8 CCT) (Refurbished)

$399.00

Mitel Mitel 9104-021-001 SX-50 COV Line Card (8 CCT) (Refurbished)

$48.98

Mitel Mitel 9104-011-106 SX-50 Generic MS55 Firmware Module (Refurbished)

$525.00

Mitel Mitel 9104-020-101 SX-50 OPS Line Card (8 CCT) (Refurbished)

$299.00

Mitel Mitel 9104-020-100 SX-50 OPS Line Card (4 CCT) (Refurbished)

$169.00

Mitel Mitel 9104-020-003 SX-50 ONS Line Card (8 CCT) (Refurbished)

$47.98

Mitel Mitel 9104-011-105 SX-50 Generic MS54 Firmware Module (Refurbished)

$495.00

Mitel Mitel 9104-010-001 SX-50 Main Control Card 1 (Refurbished)

$175.00

Mitel Mitel 9104-001-000 SX-50 Power Supply (Refurbished)

$595.00

Mitel Mitel 9104-010-100 SX-50 Main Control Card 2 (Refurbished)

$395.00

Mitel Mitel 9104-011-104 SX-50 Generic MS53 Firmware Module (Refurbished)

$375.00

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2250 products

Connect Multi-Line Telephone Systems With A KSU Phone System

Multi-line telephone systems usually include phones, wire, jacks and other hardware, and a central control unit, which is a specialized computer often called a "KSU" (Key Service Unit).

The control unit distributes power to the phones and sends dial tones to them from the phone company's incoming lines. KSU's make the phones ring, generates touch-tones, connects phones together for intercom and paging features and also provides connections for accessories such as music-on-hold players, paging amplifiers, PCs and door intercoms, and contains circuitry for basic phone functions, plus memory for functions and features. A KSU provides a network of power and capabilities to keep your communication going.

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Connect Multi-Line Telephone Systems With A KSU Phone System