Ambit U10C034, Руководство пользователя

Страница: 88 / 90

U10C034 Telephony Version v1.4 June 2008
88
conflict. Refer to the manufacturer’ documentation or you cable service provider for
further assistance.
•
Verify that TCP/IP is the default protocol for your network interface card (NIC)
•
Power cycle the cable modem by removing the power adapter from the electrical outlet and
plugging it back in. Wait several minutes for the cable modem to re-establish
communications with your cable service provider.
•
Your Ethernet cable may be damaged. Try another cable.
Q: All of the LEDs on the front of my modem look correct, but I cannot access the Internet.
A:
•
If the POWER, DS, US, Online and Link LEDs are solidly lit, the cable modem is working
properly. Try restarting the computer so that is could re-establish a connection with the
cable modem.
•
Power cycle the cable modem by removing the power adapter from the electrical outlet and
plugging it back in. Wait several minutes for the cable modem to re-establish
communications with your cable service provider.
•
If your PC is connected to a hub or gateway, try connecting the PC directly into the cable
modem.
•
If you are using a cable splitter, try removing the splitter and connect the cable modem
directly to the cable wall outlet. Wait several minutes for the cable modem to re-establish
communications with your cable service provider.
•
Your Ethernet or coaxial cable may be damaged. Try using another cable.
•
If none of these suggestions work, contact your cable service provider for further assistance.
6.5 Digital Loopback Support
The model can support digital loopback support by two connection MGCP/NCS modes,
"network loopback," and “network continuity”
. If the mode is set to "network loopback," the audio signals
received from the connection will be echoed back on the same connection. The "network loopback"
mode SHOULD simply operate as an RTP packet reflector. The "network continuity test" mode is
used for continuity checking across the IP network. An endpoint-type specific signal is sent to the
endpoints over the IP network, and the endpoint is then supposed to echo the signal over the IP
network after passing it through the gateway's internal equipment to verify proper operation. The
signal MUST go through internal decoding and re-encoding prior to being passed back. For analog
access lines, the signal will be an audio signal, and the signal MUST NOT be passed on to a
telephone connected to the analog access line, regardless of the current hook-state of that handset,
i.e., on-hook or off-hook.
New and existing connections for the endpoint MUST NOT be affected by connections placed in
"network loopback" or "network continuity test" mode. However, local resource constraints may
limit the number of new connections that can be made.
The detail procedure should be described in CMS user’s manual.