For protection of 56/64K Model 552-ST: For protection of ISDN TAs and NTUs.
CSU/DSU products.
Pins Protected: Pins 1, 2, 7, 8;
Protection Mode: Common Mode Pins 1, 2, 7, 8 to
shielding braid; Differential Mode Pins 1, 2, 7, 8
Most orders placed before 4pm (Monday - Friday) are dispatched from our warehouse the same day subject to stock availability.
For live stock availability please click live chat below and one of expert sales team will check current stock level for you.
Betterbox do not have a minimum order value or minimum order quantity and are happy to support our customers with any quantity requirement.
On most products for added peace of mind
Money back guarantee
On your first order (Terms and Conditions apply. Please call)
Thank you for the swift response and excellent Customer Service. (Procurement Officer)
Would like to say thank you so much for all your help with this order. Very much appreciated. (Stores Officer)
Thanks for all your help. I really appreciate your high level of Customer attention. (Purchasing Executive)
