User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform Chapter 3
E1 Voice Configuration
3-21
First perform voice configuration following the configuration procedur e of Beijing-s ide
router specified in section 3.4.2 step by step, and then configure DDR dialing in the
corresponding port of ISDN PRI interface. Please refer to the relevant DDR sections for
details.
2) Parameter configuration of Shanghai-side router
Configure DDR dialing in the port corresponding to Beijing-side router. Please refer to
the relevant DDR sections for details.
3) Parameter configuration of Shenzhen-side router
Please perform voice configuration according to parameter c onfiguration of
Shenzhen-side router specified in section 3.4.2.
3.5 Fault Diagnosis and Troubleshooting of E1 Voice
Fault 1: Failure in establishing connection when switch-side subscriber calls ro uter-side
subscriber
Troubleshooting: please follow the following steps:
z First, use show running command to check that all the TSs are used when
configuring signaling. Please make sure that the TSs the exchan ge uses is the
same as the TSs configured for the router. Connection cannot be establis hed, if
the TSs that the exchange uses for outgoing calls are not use d in the configuration
of the router.
z If there is no dial tone in the call duration, please check that the exchange has sent
the outgoing trunk office code to the router and that office code and access
number are configured for the telephone number on the router. Generally,
connection cannot be established, if the exchange also sends the outgoing trunk
office code and the telephone number on the router-side does not add the office
code or is not configured with access number. You can either delete t he outgoing
trunk office code in the exchange-side configuration, or configure acces s num ber
on router-side.
Fault 2: Using R2 signaling, the router fails to establish connection with subscribers on
the exchange-side.
Troubleshooting: please follow the following steps:
First, use show running command to check that the trunk mode of the router
corresponds with that of the exchange configuration. In other words, if the exchange-
side is outgoing trunk, the router-side should be incoming trunk or bi-directional trunk ; if
the exchange-side is incoming trunk, the router-side should be out-go ing trunk or bi-
directional trunk. If the trunk mode of the router-side is incoming trunk, the subscribers
on router-side can only call in, and cannot call out.