Installation manual

11
Model 3920 Plus 4-Wire/2-Wire Leased-Line Connection
Use the following procedures to connect a Model 3920Plus to the leased-line network interface:
1. Insert the 8-position, 8-conductor modular plug into the jack labeled LEASED (Figure 3).
2. Insert the other end of the modular cord into the leased-line network interface.
3. If the Model 3920Plus has a backup line, follow the steps listed in the Model 3920Plus Backup-Line
Connection section.
Dial Connection
The telephone company provides the line termination jacks for the permissive service you request. 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 telephone company assumes
that the line loss is 3 dB and no compensation is provided for additional losses. A Permissive mode telephone line
is usually terminated with a USOC RJ11C jack.
Model 3920 Plus Dial Backup Connection
For the Model 3920Plus, use the following procedures to connect the modem to the dial network interface:
1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL (Figure 3).
2. Insert the other end of the modular cord into the dial network interface.
Model 3920 Plus Leased Backup Connection
For the Model 3920Plus, use the following procedures to connect the modem to the 2-wire leased backup network
interface:
1. Insert the 8-position, 8-conductor modular plug into the jack labeled DIAL (Figure 1).
2. Insert the other end of the modular cord into the leased-line network interface.
Network Management System Connection
For the Model 3920Plus, use the following procedures to connect the modem to the network management system
interface:
1. Insert the sub-miniature, 4-conductor modular plug of the 3600 Hubbing Device into the jack labeled
NMS (Figure 3). Refer to Document Number, 3610-A2-GZ45, 3600 Hubbing Device Feature Number
3600-F3-300, Installation Instructions, for a description of the 3600 Hubbing Device. Installation for the
3920Plus is the same as for the 3610 DSU.
2. Connect the 3600 Hubbing Device to the network management system.