Specifications

IPmux-11 Installation and Operation Manual Chapter 4 Diagnostics and Troubleshooting
Diagnostic Tests 4-15
Table 4-4. Bundle Connection Parameters (Cont.)
Parameter Description
Recommendations:
Check network devices and try increasing jitter buffer configuration.
Check system’s clocking configuration
Make sure the same amount of TS for bundle is configured on each side of the IPmux-11 application,
and that the “TDM bytes in frame” parameter is identical in both IPmux-11 units.
4.3 Diagnostic Tests
Diagnostic Loopbacks
Diagnostic capabilities of IPmux-11 include external and internal loopbacks.
External Loopback
IPmux-11 can be set to 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 4-10).
This mode can also be achieved by a T1 FDL line loopback command.
IPmux-11
E1/T1 FramerPHY
E1/T1
PBX
Figure 4-10. IPmux-11 External Loopback
Internal Loopback
The E1/T1 module can be set to an internal loop 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 4-11).
IPmux-11
E1/T1 FramerPHY
PBX
IP/Ethernet
Network
Figure 4-11. IPmux-11 Internal Loopback