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Offered in 4 port design, this range of Allo Cards is accessible with full or half height metal bracket. These 3rd generation cards have been designed by using standard grade PCBs and other components. This collection of Asterisk hardware has 63 gram weight and 12.7 x 6 x 1.8 cm diameter. These support ISDN PRI protocol and are capable of handling multiple calls in any large business organization to establish reliable communication network. Excellent voice quality and application of hardware controlled Eco Cancellation Module are some other unique features of these Allo Cards. Quality of these products has been verified on the basis of their performance, audio quality of established communication network, diameter, type of raw materials used and service life.