CANOGA PERKINS 2461 E1 Modem - Manual (Page 17)

EdgeAccess Universal Chassis System
1.5 2461 Modem Operating At T1 Rate
While the 2461 modem is an E1 modem, it can also function in T1 mode. This can be
accomplished by changing a switch position on the Main Module. For Rack mount modems,
remove the modem from the chassis, and locate the T1/E1 switch on the board. Then, change the
switch to T1.
For a stand alone modem, the switch is accessible by removing the ELIM or OLIM, reaching
inside between the ELIM and the OLIM, and toggling the switch.
Figure 8. T1/E1 switch on a stand alone modem
1.6 Applications
The modem's general purpose is to extend the reach of a pair of E1 signals over fiber optic cables,
as shown below:
E1
Signal,
Router,
PBX,
etc. E1
Signal,
Router,
PBX,
etc.
Figure 9. The 2461 modem extends an E1 signal over fiber optic cables
• Payloads pass through without regard to codes or frames.
• In Redundant applications, continuous Bit Error Rate Testing on the inactive modem is
performed.
Applications include:
• Carrier Applications
• Campus Voice Applications
• Campus Data Applications
See Figure 10.
2461 Modem User Manual 1-7