CANOGA PERKINS 2461 E1 Modem - Manual (Page 15)

EdgeAccess Universal Chassis System
2461 Modem User Manual 1-7
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.