• Control section—generates control signals and the transmit clocks. This section also re-
generates the telephony clocks for the peripheral cabinets, and provides status information
for the main controller.
Specifications
Dual T1/E1 Framer
Description
The Dual T1/E1 Framer MMC is a digital trunk interface that supports the direct connection of
ISDN-PRI, T1/D4, QSIG, and MSDN/DPNSS trunks to the controller.
Table 8: Dual FIM Specifications
Specifications
Dual FIM variants
820 nm Multi-mode 1300 nm Multi-mode 1300 nm Single-mode
Part Number 50001248 50003695 50003696
Approximate maximum fiber
cable run length
1
1 km (0.62 miles) 3 km (1.9 miles) 14 km (8.7 miles)
Power consumption (Watts) 2.5 2.5 2.5
Number of fiber links per FIM 2 Tx, 2 Rx 2 Tx, 2 Rx 2 Tx, 2 Rx
Fiber connector type ST
2
ST
2
ST
2
Electrical interface for each
fiber link
3
8 serial ST links 8 serial ST links 8 serial ST links
Optical wavelength (nm) 820 1300 1300
Optical budget
4
6 db 16 db 9 db
Data rate (Mbps) 16.384 16.384 16.384
Bit rate after encoding
(Mbaud)
20.48 20.48 20.48
Fiber optic cable type 62.5/125 µm OR
50/125 µm
multimode
62.5/125 µm
multimode or
50/125 µm
multimode
9/125 µm
singlemode
Notes:
1. The run length is the one-way length of fiber optic cable between nodes.
2. ST is a registered trademark of AT&T.
3. Some channels of the electrical interface are not available.
4. The optical budget is the allowable loss through fiber optic cable, splices, and connectors. The optical
budget applies to the run length.
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