Network interfaces

Network interfaces
Code Description
A1 Type A Tie Trunk type I signalling
A2 Type A Tie Trunk type II signalling
B1 Type B Tie Trunk type II signalling
B2 Type B Tie Trunk type II signalling
CT Type C Tie Trunk
DI1 Digital Interface
DI2 Digital Interface with signaling bits
DI3 Digital Interface containing encode analogue
DSC Digital Subrate Channels
GS Ground Start
HEI Handset with CS-03 Exempted Interface (HAC / ROLR)
IST ISDN S/T Reference
ISTA ISDN S/T reference with encoded analogue
IUB ISDN U reference Basic Rate Access
IUP ISDN U reference Primary Rate Access
LS Loop Start
MC Metallic Channels
OPP Off Premises Station Proprietary
OPS Off Premises Station
PL Private Line (lease line)
RB Reverse Battery
RL Release Link Trunk
WH Wireless Handset only (HAC / ROLR)
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