CANOGA PERKINS 2270 Fiber Optic Modem - Manual (Page 54)

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Canoga Perkins
Jumpers Local Modem Remote Modem
Alt B Alt A Normal Mode *1 Alternate Mode *2 Normal Mode *1 Alternate Mode *2
OFF OFF Bi-Directional *3 Interface Only *4 Optical Only *5 Bi-Directional *6
OFF ON Interface Only *4 Bi-Directional *3 Optical Only *5 Bi-Directional *6
ON OFF Bi-Directional *3 Interface Only *4 Sys Test Only *7 Sys Test Only *7
ON ON Interface Only *4 Bi-Directional *3 Optical at Local End *8 Optical at Local End *8
*1 Alternate Loopback Mode switch (Front Panel position 8) set to Normal (Open).
*2 Alternate Loopback Mode switch (Front Panel position 8) set to Alternate (Closed).
*3 Setting Loop switch on local modem to Loc causes local modem to enter loopback as in Figure 5-2.
Local modem's Loop On indicator = ON.
Setting Loop switch on local modem to OFF returns it to normal operation.
*4 Setting Loop switch on local modem to Loc causes local modem to enter loopback as in Figure 5-3.
Local modem's Loop On indicator = ON.
Setting Loop switch on local modem to OFF returns it to normal operation.
*5 Step #1 Setting Loop switch on local modem to Rem causes modems to enter System Test Mode as in Figure 5-1.
Local modem's Loop On indicator = ON, Data Rx = Blinking.
Remote modem's Loop On indicator = ON, Data Rx = Blinking.
Step #2 Setting Loop switch on local modem to OFF causes the remote modem to enter loopback as in Figure 5-4.
Local modem's Loop On indicator = ON.
Remote modem's Loop On indicator = Blinking.
Step #3 Setting Loop switch on local modem to Rem causes both interfaces to loopback.
Local modem's Loop On indicator = Blinking.
Remote modem's Data Rx = Blinking.
Step #4 Setting Loop switch on local modem to OFF returns it to normal operation.
*6 Step #1 Setting Loop switch on local modem to Rem causes the modems to enter System Test Mode as in Figure
5-1.
Local modem's Loop On indicator = ON, Data Rx = Blinking.
Remote modem's Loop On indicator = ON, Data Rx = Blinking.
Step #2 Setting Loop switch on local modem to OFF causes remote modem to enter loopback as in Figure 5-5.
Local modem's Loop On indicator = ON.
Remote modem's Loop On indicator = Blinking.
Step #3 Setting Loop switch on local modem to Rem causes both interfaces to loopback.
Local modem's Loop On indicator = Blinking.
Remote modem's Data Rx indicator = Blinking.
Step #4 Setting Loop switch on local modem to OFF returns it to normal operation.
*7 Step #1 Setting Loop switch on local modem to Rem causes modems to enter System Test Mode as in Figure 5-1.
Local modem's Loop On indicator = ON, Data Rx = Blinking.
Remote modem's Loop On indicator = ON, Data Rx = Blinking.
Step #2 Setting Loop switch on local modem to OFF returns it to normal operation.
*8 Step #1 Setting Loop switch on local modem to Rem causes the local modem to enter loopback as in Figure 5-6.
Step #2 Setting Loop switch on local modem to OFF returns it to normal operation.
Table 5-A. Loopback Options