Panasonic HYBRID IP-PBX KX-TDA50 - Manual (Page 26)

1.4 Specifications
26 Installation Manual
Extension Connection Cable SLT 1-pair wire (T, R)
DPT 1-pair wire (D1, D2) or
2-pair wire (T, R, D1, D2)
APT 2-pair wire (T, R, D1, D2)
PT-interface CS 1-pair wire (D1, D2)
DSS Console and Add-on Key Module 1-pair wire (D1, D2)
Dimension 275 mm (W) × 376 mm (H) × 117 mm (D)
(10-4/5 in × 14-4/5 in × 4-3/5 in)
Weight (when fully mounted) Under 3.5 kg (7.72 lb)