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$329.26 - $329.26

The ADTRAN DSU III AR is a technologically advanced, high performance data service unit/channel service unit. This unit provides a reliable interface between the digital data service (DDS) or 4-wire Switched 56 (SW56) network and the customer's data terminal equipment (DTE). The unit is an all-rate ... Read more

$246.21 - $451.03

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$44.97 - $228.96

Product Features: Interface: Serial RS-232; Enclosure: External ... Read more

$413.64 - $413.64

ADTRAN, Inc. designs, develops, and manufactures ADvanced TRANsmission products for high-speed digital communications. ADTRAN commitment to total customer satisfaction requires continually developing and improving products to meet changing needs while maintaining the highest level of quality. That's... Read more

$157.99 - $175.82

Product Features: Interface: RJ-11; Transmission Line: Analog; Type: Voice Interface Card ... Read more

$225.95 - $329.26

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$497.99 - $563.31

The ADTRAN ISDN Service Unit (ISU) 128 connects data terminal equipment (DTE) to the ISDN network. The ISU 128 is a full-featured single port terminal adapter that allows cost-effective high-speed data transmission at rates up to 128 kbps. ... Read more

$74.99 - $74.99

Product Features: Interface: Expansion Slot; Enclosure: Internal; Type: Voice Interface Card ... Read more

$449.00 - $449.00

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$530.75 - $530.75

NetVanta 7100 T1/PRI Voice Interface Module provides one RBS T1 or one PRI (5E, DMS100, or National) interface for termination of TDM voice trunks and includes DBU port. ... Read more

$239.95 - $329.26

The ADTRAN DSU III AR is a technologically advanced, high performance data service unit/channel service unit. This unit provides a reliable interface between the digital data service (DDS) or 4-wire Switched 56 (SW56) network and the customer's data terminal equipment (DTE). The unit is an all-rate ... Read more

$418.99 - $489.20

provides four analog rj-11 trunk (fxo) ports for termination of pstn circuits. supports loop-start and ground-start and captures caller id name/number using fsk. ... Read more

$329.26 - $329.26

ATLAS 550 Modules Network Interface Module fits into one of the bottom two network slots, which are smaller than the top four user slots, on the back of the ATLAS 550. Ports on network modules are individually configurable for network or user termination. ... Read more

$1305.55 - $1370.53

Product Features: ISDN Terminal Interface: PRI; Transmission Line: ISDN ... Read more

$1872.64 - $1872.64

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$578.00 - $578.00

The NetVanta Series of internetworking products are designed for cost-effective Internet access, corporate Frame Relay, point-to-point connectivity, and Virtual Private Networks (VPN). These modular platforms offer a complete turnkey solution for IP access routing, WAN connectivity. ... Read more

$170.95 - $170.95

Product Features: Downstream Speed: 1.544 Kbps; Platform: PC; ISDN Terminal Interface: PRI; Transmission Line: ISDN; Type: ISDN Terminal Adapter ... Read more

$306.80 - $389.00

The ADTRAN T1 ESF CSU is a full-featured T1 Channel Service Unit used to connect T1 data terminal equipment (DTE) such as a PBX, switch or channel bank to T1 facilities. Capable of interfacing to both B8ZS or AMI circuits, the T1 ESF CSU can convert signal formats or line code to integrate older equ... Read more

$773.57 - $819.85

The Adtran Total Access 1500 Dual T1 Line Interface Unit (LIU) is a common module plug-in unit that connects the channel bank to a T1 line at the DSX-1 level. All data formatting and line encoding, as well as backplane timing and control, are performed by the ACT LIU. The LIU can be provisioned loca... Read more

$620.33 - $620.33