Telenetics RM16M - Versatile Rack Mounting Chassis, Installation And Operation Manual

Page: 9 / 49

Page 9
Back Panel Interface Connectors
All DTE, Telco and power connections are made at the back panel of
the Data Shelf.
The DTE connectors can be:
v
Individual 25-pin connectors

one for each PC card (standard)
v
Two 50-pin mass termination connectors (optional)
v
Wire-wrap pins (optional)
The Telco connectors can be:
v
Individual 8-pin modular jacks

one for each PC card (standard)
v
Two 50-pin termination connectors (optional)
v
Wire-wrap pins (optional)
The telephone-line connectors are identified by the telephone
company Universal Service Ordering Code (USOC) and must be
specified when ordering standard jack arrangements from Telenetics.
The various jack arrangements ensure that the signal level received at
the telephone company central office does not exceed – 12 dBm. The
Data Shelf has been registered with the FCC per the requirements of
Part 68 of the FCC rules for:
1. Programmable Mode

the local telephone company will install a
resistor internal to the jack (USOC RJ455 or RJ41S).
2. Permissive Mode

the individual modem cards are
preprogrammed for a maximum transmit level of –9 dBm (USOC
RJ11C or RJ16X).
Figures 1-3 through 1-5 show examples of Data Shelf back panels.
NOTE: For more information about the power connections, refer
to “Electrical Installation” on page 16.