User manual

DynamixUM‐SNBUserManualVer1.00141
For Serial Interface model as CPE side, there are: Local Digital, remote line, remote payload, far-end line, far-end payload and
V.54.
If the device has been connected or under handshake, there will not are far-end line, far-end payload and V.54.There are no
diagnostic function on Ethernet interface model.
Stand alone NTU, no connection with other NTU:
E1/T1 interface
CO side
Serial interface
CO side
Local Digital Local Digital
Local Local
Remote line Remote line
Remote payload Remote payload
E1/T1 interface
CPE side
Serial interface
CPE side
Local Digital Local Digital
Remote line Remote line
Remote payload Remote payload
After connection both CO side and CPE side:
E1/T1 interface
CO side
Serial interface
CO side
Local Digital Local Digital
Local Local
Remote line Remote line
Remote payload Remote payload
Far-end line Far-end line
Far-end payload Far-end payload
V.54
E1/T1 interface
CPE side
Serial interface
CPE side
Local Digital Local Digital
Remote line Remote line
Remote payload Remote payload
Far-end line Far-end line
Far-end payload Far-end payload
V.54
About V.54 : An ITU standard (1976) for various loopback tests which can be incorporated into modems for testing the
telephone circuit and isolating transmission problems. Operating modes include local and remote digital loopback and local and
remote analog loopback.