Specifications

Chapter 6 Diagnostics and Troubleshooting Installation and Operation Manual
6-18 Testing IPmux-24 IPmux-24 Ver. 1.5
Running Diagnostic Loopbacks
External Loopback
IPmux-24 can be set to start an external loopback to test the connection
between the E1/T1 port and the PBX. In this mode, data coming from the PBX is
both looped back to the PBX and transmitted forward to the IP network
(see
Figure 6-11 ).
External loopback cannot be activated on the TDM links with transmit clock
source configured to adaptive.
Figure 6-11. External Loopback
Internal Loopback
The E1/T1 module can be set to start an internal loopback to test the connection
between the E1/T1 port and the IP network. In this mode, data coming from the
IP network is both looped back to the IP network and transmitted forward to the
PBX connected to the E1/T1 port (see
Figure 6-12 ).
Figure 6-12. Internal Loopback
³ To run a loopback:
1. From the Diagnostics menu (
Figure 6-5 ), select Loopback.
The Loopback menu is displayed (see
Figure 6-13 ).
2. From the Loopback menu, type F to select the E1/T1 link that you intend to
test.
3. From the Loopback menu, select Loopback state, and choose loopback that
you intend to run (Internal or External).
Note