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11

2. Press the  

  key until Factory comes into view, then press the F1 key to display the factory preset

configurations.

3. Press the  

  key until the appropriate factory preset appears on the LCD, and press the corresponding

function key to select your choice. (For certain factory presets you will also need to choose the
appropriate mode.)

4. Choose Function appears and displays the Edit and Save functions.

5. Press the F3 key (Save) to save the new factory preset configuration to one of three configuration areas,

Active (Saved), Customer 1, or Customer 2.

(These three configuration areas are nonvolatile memory locations. Active (Saved) contains the most
recently saved changes to any configuration options. In the event of power loss, the modem retrieves these
configuration options. Customer 1 and Customer 2 are user-defined configuration areas.)

The LCD now displays Sav EditArea to.

6. Press the  

  key until the appropriate configuration area appears on the LCD, then press the

corresponding function key to select your choice. (Saving configuration options to the Active (Saved)
configuration area automatically saves them to the Active (Operating) configuration area.) The LCD
displays Command Complete.

7. The modem is now configured with the selected factory template. Press the  

  key to return to the

Top-Level menu.

Using AT Commands

When using AT commands, the following criteria must be met:

Make sure the asynchronous DTE’s communication software is configured for 10-bit character format (for
example, 8 data bits, no parity, and 1 stop bit).

Make sure the DTE cable is attached to the DTE connector on the rear of the 391x Series modem and to the
correct serial communications port on the asynchronous DTE.

Configure the modem for Async Dial as described earlier in Using the DCP. To verify that the modem is
connected and functioning properly, enter the following:

TYPE:

AT

PRESS:

Return (Enter)

The screen displays OK.

If the modem does not return OK, refer to Appendix B, Troubleshooting, in Document No. 3910-A2-GN32.

NOTE

If the factory preset configuration is something other than Async
Dial, you do not have AT command control. To regain AT command
control, select, via the DCP, the Async Dial factory preset
configuration as described earlier in 

Using the DCP.

Summary of Contents for COMSPHERE 3910

Page 1: ...o be used in conjunction with the COMSPHERE 3900 Series Modems Models 3910 and 3911 Point to Point Multipoint Installation and Operation Manual Document No 3910 A2 GN32 Warranty Sales and Service Info...

Page 2: ...General purpose cables are provided with this product Special cables which may be required by the regulatory inspection authority for the installation site are the responsibility of the customer 7 Whe...

Page 3: ...3 Notices...

Page 4: ...ided to the telephone company 2 An FCC compliant telephone cord and modular plug is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiring...

Page 5: ...rporation commission for information Canada NOTICE TO THE USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORK The Canadian Department of Communications label identifies certified equipment This ce...

Page 6: ...ation on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100 If your equipment is in need of repair r...

Page 7: ...le NIM for modems installed in Slots 1 8 and one NIM for modems installed in Slots 9 16 required for dial line applications For installation of the COMSPHERE 3000 Series Carrier into a cabinet refer t...

Page 8: ...or the DTE interface Connecting Model 3910 Modems with Supplied Cables Figure 1 shows how Model 3910 modems are connected to certain TELCO jack types using the appropriate cables 8 POSITION 8 CONDUCTO...

Page 9: ...st Advance coordination with the telephone company is suggested when connecting the modem to telephone dial lines PSTN In the Permissive mode the modem s transmit output level is fixed at 9 dBm The te...

Page 10: ...f the LCD Although a failure has occurred the modem will attempt to operate This allows you to activate a more thorough self test using the Test branch For a better understanding of the Test branch re...

Page 11: ...ng configuration options to the Active Saved configuration area automatically saves them to the Active Operating configuration area The LCD displays Command Complete 7 The modem is now configured with...

Page 12: ...o use AT commands after saving a factory configuration Other selections remove AT command control The only way to return to AT command control is through the DCP as described earlier in Using the DCP...

Page 13: ...signed for installation in a COMSPHERE 3000 Series Carrier which supplies both the operating power and the leased and or dial network connections For correct power DTE dial line leased line and networ...

Page 14: ...up self test in which all faceplate LEDs light Return to the rear of the carrier and tighten the rear connector plate Figure 2 Installing a Model 3911 Modem If the modem is to communicate with an ins...

Page 15: ...t 6 Once you have determined that the modem is installed properly and completed its power up self test rotate the circuit pack lock until it covers the faceplate latch Figure 3 and tighten the retenti...

Page 16: ...y to power down the carrier to remove and replace a Model 3911 modem Perform the following steps 1 Rotate the circuit pack lock until the release tab is exposed 2 Press down on the release tab and pul...

Page 17: ...x Frame Size RdcdAsyncBufSiz Test DTE RL CT140 DTE LL CT141 Test Timeout Rcv Remote Loop V54 Address V54 Device Type Misc StrapsWhenDisc Speaker Control Speaker Volume Access frm Remt RemAccssPasswrd...

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