HI Amar,
Your choice is indeed a good option. The SPA-8XT3/E3 cards would require a SPA Interface Processor card on which this SPA card needs to sit on. You can use either a ASR-1000-SIP10 or a ASR-1000-SIP40. The cables that can be used are CAB-T3E3-DINBNC-F, CAB-T3E3-DINBNC-M & CAB-T3E3_DINDIN-F.
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Thanks & Regards,
Vignesh R P