Paradyne TNE1520-P Installation Instructions Manual page 6

Speed – Ports 1 and 2, Switches 1 and 2: TNE1520-P Only
The T1 lines each have 24 channels continually running at 64 kbps for a collective
bandwidth of 1,536 kbps. The timeslot configuration determines how many of the
channels for each port will actually receive data. Ports configured to operate as
fractional T1 lines require contiguous timeslots as indicated in the table below.
Port 1 Configuration Switches 1 and 2 on the TNE1520-P work together to provide four
timeslot/bandwidth options for the Port 1 T1 link. Port 2 Configuration Switches 1 and 2
on the TNE1520-P provide the timeslot/bandwidth options for the Port 2 T1 link. The
TNE1520-S determines timeslot and bandwidth configurations for the two T1 links via
communication with its partner T1 provider unit.
Table 3. T1 Speed Settings
Switch 1 Switch 2
down down
up down
down up
up up
Frame Type – Port 1 Only, Switch 3
Frame type is the T1 data encapsulation method. A frame consists of 193 bits (8-bit
samples of each of the 24 T1 data channels plus a synchronization bit) transmitted at a
rate of 8,000 frames per second (1,536 kbps) across the T1 line.
Extended Super Frame – Extended Super Frame (ESF) format, used in Wide Area
Networks (WANs), assembles data into 24-frame transmission clusters and
integrates the following:
— Facilities Data Link: Facilities Data Link (FDL) provides in-service monitoring
and diagnostics.
— Cyclic Redundancy Check: Cyclic Redundancy Check (CRC) scrutinizes data
integrity and detects line errors.
Super Frame – Super Frame (SF) format assembles data into 12-frame
transmission clusters. SF does not utilize FDL or CRC.
Timeslots Bandwidth (kbps)
1–24
1–18
1–12
1–6
6
1,536
1,152
768
384