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Several Cisco WAN SwitchProbe devices—those that connect to the WAN link between a Cisco router with an integrated CSU/DSU and the WAN demarcation point—require a T1/E1 WAN tap to monitor the network.
The T1/E1 WAN tap is a passive, pass-through, active repeating tap that monitors T1 or E1 network activity. This document provides instructions for connecting the T1/E1 WAN tap to a SwitchProbe device.
The T1/E1 WAN tap kit consists of the following items:
Figure 1 shows the front panel of the T1/E1 WAN tap. The front panel of the tap contains one DB-25 port.
Figure 2 shows the rear panel of the T1/E1 WAN tap. The rear panel contains four RJ-48c ports—labeled IN and OUT, and four Bantam ports—labeled Monitor TX and Monitor RX.
Connecting the WAN SwitchProbe device to a network segment is a two-stage process:
To connect a T1/E1 WAN tap to the SwitchProbe device, see Figure 3 and follow these steps:
Step 2 Connect the DB-26M (male) end of the 15-foot cable to one of the SwitchProbe device WAN interfaces (26-pin female connector).
Step 3 To monitor a T1 line, set the DIP switch (on the right front of the tap) to T1.
To monitor an E1 line, set the DIP switch to E1.
Step 4 To monitor RJ-48c connections, set the DIP switch to RJ.
To monitor Bantam connections, set the DIP switch to Bantam.
Because routers have many different types of connectors, there are many ways you can connect a tap to a network segment.
The following sections describe four common scenarios for connecting the T1/E1 WAN tap to a network segment:
Figure 4 shows how to place the tap and SwitchProbe device between a router with a Data Service Unit (DSU) and a Channel Service Unit (CSU) connected to a WAN cloud.
The T1/E1 WAN tap kit consists of two RJ-48c cables (among other cables). To connect the tap to a router with a DSU and a CSU, see Figure 5 and follow these steps:
Step 2 Connect the other end of this cable to the router (with DSU).
Step 3 Connect one end of the second RJ-48c cable to the tap port labeled OUT.
Step 4 Connect the other end of this cable to the CSU.
Figure 6 shows how to place the tap and SwitchProbe device between a router (with DSU/CSU) and a T1 line connected to a WAN cloud.
The T1/E1 WAN tap kit consists of two RJ-48c cables (among other cables). To connect the tap to a router (with DSU/CSU) and a WAN cloud, see Figure 7 and follow these steps:
Step 2 Connect the other end of this cable to the router (with DSU/CSU).
Step 3 Connect one end of the second RJ-48c cable to the tap port labeled OUT.
Step 4 Connect the other end of this cable to the WAN cloud.
Figure 8 shows how to place the tap and SwitchProbe device between a router (with G.703-coax) and an E1 line connected to a WAN cloud.
The T1/E1 WAN tap kit consists of two RJ-48c-to-dual-BNC cables (among other cables). To connect the tap to a router (with G.703-coax) and a WAN cloud, see Figure 9 and follow these steps:
Step 2 Connect the other end of this cable (with dual BNC connectors) to a T-connector (between router and WAN cloud).
Step 3 Connect the end of the second cable (with RJ-48c connector) to the tap port labeled OUT.
Step 4 Connect the other end of this cable (with dual BNC connectors) to the T-connector (between router and WAN cloud).
Figure 10 shows how to place the tap and SwitchProbe device between a router (where the CSU has Bantam jacks) and a T1/E1 line connected to a WAN cloud.
The T1/E1 WAN tap kit consists of Bantam jack cables (among other cables). To connect the tap to a router (where the CSU has Bantam jacks) and a WAN cloud, see Figure 11 and follow these steps:
Step 2 Connect the other end of this cable (with Bantam jacks) to the router (with CSU having Bantam jacks).
Step 3 Connect the end of the second cable (without Bantam jacks) to the tap port labeled OUT.
Step 4 Connect the other end of this cable (with Bantam jacks) to the router (where the CSU has Bantam jacks).
Depending on the CSU model, not all Bantam-to-Bantam connections will be successful. As an alternate, use the tap-to-router cabling method, using an RJ-48-to-Bantam cable as illustrated in Figure 12.
The T1/E1 WAN tap kit consists of RJ-48-to-Bantam jack cables (among other cables). To connect the tap to a router (where the CSU has Bantam jacks) and a WAN cloud, see Figure 12 and follow these steps:
Step 2 Connect the end of the cable (with RJ-48 connector) to the tap port
labeled IN.
Step 3 Connect the other end of this cable (with Bantam jacks) to the router (where the CSU has Bantam jacks).
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Posted: Thu Jul 25 04:49:41 PDT 2002
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