Dial Backup Considerations - Paradyne COMSPHERE 3610 Operator's Manual

COMSPHERE 3600 Series Data Service Units
ADp
241
242
243
244
245
246
247
248
Tributary Network Address
Tributary network addresses are user-definable, but
care must be taken to ensure that a unique address is
assigned. If two tributaries are assigned the same network
address, neither the control DSU or the NMS will be able
to communicate with either device.
The network address of a tributary DSU is assigned by
the user as any number within the range of 1 to 255 for
ADp and 1 to 79 for DPII. The tributary DBM, if present,
is automatically assigned a network address equal to its
DSU's user-assigned address plus 1.
NMS communications using ADp and DPII
protocols are directed to a tributary via a link-level
network address in the form control channel/control
address/tributary address. For example, a control
DSU with address 157 can have tributaries with
addresses in the range 1/157/1 to 1/157/79 using
DPII protocol and 1/157/1 to 1/157/255 using ADp
(See Figure 1-5).
DCP communications from a control are directed to
a tributary by specifying the tributary's address.
1-22
Conversion Table for DMC Addresses
Conversion from ADp Addresses to DMC
DMC Carr Slot
3c20 8 17
3c40 8 18
3c60 8 19
3d00 8 20
3d20 8 21
3d40 8 22
3d60 8 23
3e00 8 24
Table 1-7
(5 of 5)
ADp DMC
249 3e20
250 3e40
251 3e60
252 3f00
253 3f20
254 3f40
255 3f60

Dial Backup Considerations

For ADp and DPII protocols, the tributary DBM is
diagnostically a tributary of the control DSU, not of the
control DBM. When there is no dial connection, the
control DSU routes diagnostic messages to the tributary
DBM over the DDS circuit through the tributary DSU.
When the DDS is active and there is no backup call,
diagnostic messages are routed over the DDS
circuit. If configured for disruptive diagnostics, this
may cause data errors that may require
retransmission of data.
On point-to-point circuits, when the DDS is active
and there is a dialed connection in Standby mode,
the DSU uses the dialed circuit for diagnostic
traffic.
When the DDS circuit is down and a dialed backup
call is operating, diagnostic continuity is
maintained. The control DSU reroutes the
diagnostic information over the dialed circuit.
In DMC protocol, the tributary DBM is addressed via
the control DBM using line and drop designations.
Control and tributary DSUs must be configured on one
line; DBMs should be configured on a separate line.
Remote commands may cause data errors that may require
retransmission of data.
July 1999
Carr Slot
8 25
8 26
8 27
8 28
8 29
8 30
8 31
3610-A2-GB91-90