Comtech EF Data SDM-9600 - Manual (Page 46)

SDM-9600 with SDM-9606 Blades Hardware Installation Guide
4-8 Memotec Inc.
4.4 Hardware Strapping for E1 Ports
The E1/T1 interfaces on the SDM-9606 blade can be strapped for E1-75 operation
(see next section).
NOTE: No hardware strapping is required for NT/TE mode on these
interfaces. All E1/T1 interfaces are strapped at the factory as NT.
If you need a TE connection, attach a crossover cable to the inter-
face.
For details about the E1/T1 ports, refer to “E1/T1 Digital Interfaces” on page 5-
15 .
4.4.1 Strapping for E1-75 Operation
An E1-75 connection is accomplished by installing an adaptor on the E1/T1 port
(see “Supporting E1-75 on an E1/T1 Port” on page 5-16 ). The following adaptor
is available: RJ-48 to E1-75 dual BNC (Part No. AG2CA0001).
No other hardware strapping is required.
To set an E1/T1 port to E1-75, connect an adaptor for E1-75 operations onto the
digital port using an RJ-48 to E1-75 dual BNC adaptor cable (Part No.
AG2CA0001, see “Adaptor Cable” on page 5-17 )
NOTE: Without an adaptor, the E1 port will not operate at 75 ohms.
CAUTION:
The RJ-48 to E1-75 dual BNC adaptor cable and attached
BNC cables require strain relief to ensure that they do not loosen from
the digital port:
-If the unit is mounted in a rack, you must secure the cables to a side
rail using tie-wraps, or support the weight of the cables on a tray
-If the unit is on a table, you must support the weight of the cables on
the table.
The digital port can desynchronize and the unit reset if the full weight of the BNC
cables is unsupported.