Specifications
Optimux-XLT1 Installation and Operation Manual  Chapter 2 Installation and Setup 
  Interfaces and Connections  2-11 
Table 2-4. Management, Alarm and Link Connectors 
Connector  Type  Used to connect 
POWER B  Standard 3-pin plug  Redundant power source (DC or AC plug), when the 
redundant power supply option is selected 
POWER A  Standard 3-prong plug  Main power source (DC or AC plug) 
CONTROL/MNG  25-pin D-type female  RS-232 ASCII terminal 
MNG-ETH RJ-45  MNG-ETH entrance 
ALARMS  9-pin D-type female  Optimux-XLT1 dry contacts of two alarm relays 
(major and minor) to a remote monitoring site 
LINK A, TX/RX  ST, SC or FC/PC  Main fiber-optic link 
LINK B, TX/RX  ST, SC or FC/PC  Redundant (backup) fiber-optic link 
For the pin assignment of the connectors, refer to the Interface Specification 
appendix. 
Channel Connections 
The Optimux-XLT1 has four groups of interface ports designated A to D on the 
front panel of the unit. 
Channel A is a fixed 10BaseT Ethernet port with an RJ-45 connector. The other 
groups of interface ports should be prepared according to the ordered channel 
modules (see the Channel Module Options table). Any combination of 10BaseT 
Ethernet, T1 balanced, Fast Ethernet and High Speed modules can be installed in 
Optimux-XLT1 slots B to D (see Figure 2-1). A vacant slot should be closed up 
using a blank panel. 
For T1 lines, the maximum allowable line length between the T1 ports and the 
user's equipment is 655 ft (200m) according to ANSI T1.102. The cable type and 
length should be selected accordingly. The length of a standard UTP cable to a 
10BaseT Ethernet or 10/100BaseT station is 100 meters (330 ft). 
The Interface Specification appendix provides the pin allocation for all the 
connectors. 
Connect the channel cables to connectors corresponding to the interface in use 
(see Figure 2-4, Figure 2-5 and Figure 2-6) as indicated in Table 2-5. 
Table 2-5. Cable to Interface Connections 
Interface Connector Type Note 
G.703 balanced  RJ-45  Channel numbers 1 to 4 for the 4T1/BAL modules, 1 
and 2 for the 2T1/BAL module 
Ethernet, Fast Ethernet  RJ-45 
Physical connection 
HS  SCSI 26-pin  To achieve the desired connector type, use the 
supplied adapter cable 
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