Troubleshooting guide

Section 7, User Interface Guide - DLP-730, Provision DS3/DS2 Network
61186003L1-1D 7-115
• Select 3, FEAC, to allow the M13 MUX to respond only to remote loopback requests
received over the DS3 FEAC channel. This mode is only valid when using C-BIT framing.
In this mode, DS2 C-Bit loopbacks are ignored.
• Select 4, C-BIT, to allow the M13 MUX to respond only to remote loopback requests
received over DS2 C bits. This mode is available when operating in either C-BIT or M13
framing. In this mode, FEAC loopbacks received when operating in C-BIT framing are
ignored.
13. From the Networking Provisioning menu, select DS3 XCV THRESHOLD.
14. Enter a value from 1 to 5 to set the desired Excessive Code Violations (XCV) threshold,
and press
ENTER.
• Select 1 to Disable. Code violations do not cause the MUX modules to switch.
• Select 2 for 1E-3. The MUX modules switch if more than one out of every 1,000 bits
received on the DS3 signal contains a code violation.
• Select 3 for 1E-4. The MUX modules switch if more than one out of every 10,000 bits
received on the DS3 signal contains a code violation.
• Select 4 for 1E-5. The MUX modules switch if more than one out of every 100,000 bits
received on the DS3 signal contains a code violation.
• Select 5 for 1E-6. The MUX modules switch if more than one out of every 1,000,000 bits
received on the DS3 signal contains a code violation.
15. From the Networking Provisioning menu, select IP FORWARDING PROTOCOL.
This setting controls the protocol used to carry the IP data over the DS3 overhead. Refer to
“UIG-540, SCU Utilities” for additional IP Forwarding information.
The available options for the Protocol setting are described in Table 7-5. Maximum
Transmission Unit size (MTU) is described in Table 7-6.
Table 7-5. IP Forwarding Protocol Mode Settings
Mode Description
ADTRAN With this setting, an ADTRAN proprietary protocol is utilized to carry the IP data.
This protocol is compatible with all ADTRAN MX2820 and MX2800 systems that
support IP forwarding. This is the preferred setting when an ADTRAN product is con
-
nected to each end of the DS3 facility.
PPP The PPP protocol is included to provide compatibility with certain non-ADTRAN mul-
tiplexer products which use the PPP protocol to carry IP data across the DS3 over-
head. This option should not be selected unless the device connected at the far end of
the DS3 facility supports this protocol.