Avaya G860, Installing And Operating

Page: 174 / 214

174 Installation & Operation Manual
Avaya G860 Media Gateway
Table 39: Troubleshooting Faults in the Media Gateway
Problem Possible Cause(s) What to do Refer to
The configured
MAC addresses for
the board are
wrong. Check the MAC address on the
board and make sure that they are
the same as listed in the
configuration.
If the MAC address in the
configuration is not the same as on
the board, LOCK the board,
configure the correct MAC
addresses and then UNLOCK the
board.
Pinging to a global
IP address
sometimes does
not return a
response. The Network has
loops inside. Because switch boards disable their
spanning tree functionality, external
switches can create loops in the
network. In this case, the packets
may sometimes get lost.
Make sure that external
switches/routers have the “spanning
tree” feature enabled.
When an ES
board is switched-
over, there is no
connection to the
SC. Each ES board is
connected to a
separate external
router, and the
routers are not
connected by
VRRP protocol. When one switch stops working, all
external networks must go through
the other external router. This is
possible only if the external routers
are connected and are using VRRP
protocol.
The switchover
from a failed TPM
board to the
redundant TPM
board is not
working. The state of the
Redundant TPM
board is not
ENABLED and
UNLOCKED. The Redundant TPM board must be
working and its status must be
correctly set in order to allow the
switchover.
Possible Voice Problems
G.711 voice
quality is bad
(clicks) Silence
compression not
compatible (when
working with
different Gateway
other than Avaya
Gateway) Disable it and check if quality is
better.
Check that packet period in remote
side is 20 msec.
ƒ
Packet size not
compatible (with
G.711)
Check that the correct
μ
-law or A-law
compression is in use
No voice There is no match
in codecs Change codec definition.