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ITU There are 5339 products.
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ITU-T Q.463
ITU-T Q.463 Signalling between the outgoing international R2 register and an incoming R2 register in a national exchange in the destination country
$25.00In Stock -
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ITU-T Q.471
ITU-T Q.471 Termination of interregister signalling; At the last incoming R2 register situated in the exchange to which the called subscriber is connected
$25.00In Stock -
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