NPTLCON03

NPTLCON03 is a protocol converter: a small standalone unit that translates between two interface types so equipment that was never designed to talk to each other can be joined up.

This one bridges Ethernet and a 64 kbit/s G.703 co-directional circuit, which is a very specific and very long-lived requirement. G.703 at 64 kbit/s is the interface used for low-speed control and telemetry circuits in utilities, rail signalling, SCADA and legacy telecoms, and the equipment at the far end of those circuits frequently cannot be changed: it is embedded in a substation or a signalling installation with its own approval regime. A converter like this is what lets a modern Ethernet-based transport network carry that circuit without replacing the thing at the end of it. Co-directional means the data and its timing travel together in the same direction on the same pair, as distinct from contra-directional where the clock comes from the other end. The two are not interchangeable and the distinction is easy to miss when ordering, because both are described as G.703 64 kbit/s.

It takes a minus 48 V DC supply, so it expects to live in a telecoms environment rather than beside a mains socket. On a site without DC that means a small rectifier, which is worth remembering because a converter is a low-value item that can quietly require a power arrangement to be sorted out.

The RTN 950 is a Huawei microwave platform, and its lifecycle status is genuinely unclear. Huawei’s RTN line as a whole is still an active product family, but the position of this particular model could not be established: Huawei’s lifecycle database sits behind a login and model-level end-of-sale and end-of-support dates are not published openly.

So this page will not tell you the platform is current and will not tell you it is finished, because neither can be checked from outside. If that distinction matters to your purchase, and on microwave it often does because licensed-band links tend to live for a decade, ask us to confirm it with Huawei before you commit.

Two things worth saying about converters generally. They are usually deployed in pairs and the two ends may be different part numbers, so confirm both. And they add a point of failure and a little delay to a circuit that may be timing-sensitive, which on signalling and telemetry circuits occasionally matters. Tell us exactly what is at each end, including the timing arrangement, and we will confirm the pair you need.

Green Code Technologies supplies Huawei transmission equipment together with the racks, power, cabling and installation parts that go with it. We are a supplier of Huawei alongside HPE, Dell, Cisco, Samsung and Netgear, and we would rather confirm a part against Huawei’s own documentation than sell you the wrong one, which on RTN 950 equipment is worth doing. Send us the site, the power available there and what the node has to contain and we will come back with a straight answer.