The OPTEL2 is used to extend a two wire telephone line using optical fibers. The OPTEL2-SL connects to a plain old telephone at one end of a link, and the OPTEL2-CO connects to a CO or PBX at the other end of the link. Connecting two OPTEL2-SLs together creates a dedicated voice link (order-wire). Either single or multimode fiber may be used interchangeably.
The OPTEL3 is used to extend a two wire telephone line using optical fibers. The OPTEL3-SL connects to a plain old telephone at one end of a link, and the OPTEL3-CO connects to a CO or PBX at the other end of the link. Connecting two OPTEL3-SLs together creates a dedicated voice link (order-wire). The OPTEL3 has the ability to carry RS232 data. Either single or multimode fiber may be used interchangeably.
The EM2-VR combines a bi-directional 2-wire or 4-wire voice signal with a full duplex RS232 data channel, and transmits it over a 64 kbps synchronous E0 or DS0 channel with a V.35 interface. At the remote end which may be another EM2-VR or an EM200-VR, these combined data/voice signals are separated, and output on their respective connectors. Note that when using a DS0 channel in a T1 carrier, there must be no “robbed bits”. The voice channel supports E&M signaling and a high quality voice which is compressed to 40 kbps. The RS232 channel is data format and speed transparent to rates of 19.2, 9.6, 4.8, 2.4, and1.2 Kbps and less.
The OM15E transmits an E1 telephony signal across a pair of optical fibers. At the far end, the electrical signal is regenerated by a second OM15E. Alarm contacts flag power supply or optical link failure. A second set of modems may be connected to the first in hot-standby mode when
redundancy is required. This very robust modem is MIL461 certified.
The OM15B transmits a T1 or E1 signal over a pair of fiber optic cables. At the far end, the signal is regenerated by a second OM15B. The modems offer a number of features including dry contact sensing and an RS-232 auxiliary channel.
