[1] Such circuits are the usual kind between telephony carriers, both wired and wireless, and typically by OC1[citation needed] optical connections.
Type 734 has a larger center conductor and insulator for lower losses for a given distance.
The BNC connectors are also very important as are the crimping and cable stripping tools used to install them.
Trompeter, Cannon, Amphenol, Kings, and Canare make some of the most reliable 75 ohm connectors known.
RG-6 or even inexpensive RG-59 cable may work temporarily when properly terminated, though it does not meet telephony technical standards.