Specifications

Chapter 1 Introduction Installation and Operation Manual
1-6 Functional Description Optimux-34 Ver. 2.81
1.3 Functional Description
E3 Link Interface
Optimux-34 can be ordered with an E3 electrical or a fiber optic link interface.
The electrical interface provides short-range transmission according to ITU-T
G.703 via the coaxial cable infrastructure. The optical interface is used to extend
the transmission range to 110 km (68 miles), enhance transmission security and
achieve immunity against electrical interference.
User Ethernet Port
The 10/100BaseT module supports two queues for handling priority with 2:1
weighted fair priority scheme as follows:
• Tagged frames with tagged fields 4-7 are ingressed into the high priority queue.
• Tagged frames with tagged fields 0-3 are ingressed into the low priority queue.
The user Ethernet port has a fault propagation option, which causes the LAN link to
fall in case a signal loss, a frame loss, or an AIS is detected in the active E3 link.
The User Ethernet port supports the IEEE 802.3x flow control and backpressure
features, as well as automatic MDI/MDIX crossover.
Optimux-34 is supplied with a 10/100BaseT Ethernet that can be activated at any
time by purchasing, downloading, and installing a user-installable software key.
E1/Ethernet Granularity
E1 and Ethernet share bandwidth resources in Optimux-34. The following table
lists the possible options available when combining E1 and Ethernet services.
Table 1-2. E1 and Ethernet Combinations
Available E1 ports Ethernet Capacity
[Mbps]
16 0
12 8
8 16
4 24
0 32
In order to establish connection between the Ethernet USER ports of two
Optimux-34 units, it is necessary to disable an appropriate number of E1 ports
according to the required connection bandwidth of the Ethernet link starting from
the first E1 port. To enable the Ethernet USER port, you must disable the first E1
ports, 1 to X. (1-4, 1-8, 1-12 or 1-16) according to the required bandwidth.
Note