4RF Aprisa XE User Manual page 165

Cross Connections | 163
T1 ESF - PTS mode
T1 ESF - PTS mode provides 24 timeslots to transport traffic using the G.704 24 frame Extended Super
Frame without demultiplexing the signalling.
Pass Thru Signalling provides cross connection of the entire framed T1 timeslot between T1 ports
(including the inherent robbed bit signalling). This is the most efficient method of transporting a framed
T1 over the radio link as no additional radio link capacity is required to transport the signalling because
the CAS is not demultiplexed.
To maintain multi frame alignment between two framed T1 ports, a FPS (Frame Pattern Sync) bit is
required to be cross connected between the two framed T1 ports. This FPS bit requires an additional
8 kbit/s of radio link capacity.
The FDL (Facility Data Link) can be cross connected between the two framed T1 ports if required. This FDL
bit requires an additional 8 kbit/s of radio link capacity.
The timeslot table left column is used to map timeslot bits but the timeslot table right column for CAS bits
(ABCD) is not used.
T1 ESF - PTS mode is used when access to the signalling bits is not required but are transported between
T1s, for example:
Drop and Insert connections between 24 frame Extended Super Framed T1s or data interfaces