Alcatel MainStreet 2902, Manual

Page: 181 / 344

17 — DNIC and 2B1Q modules
2902 MainStreet Technical Practices 17-13
May 2002 90-2906-01
Procedure 17-9 To configure a master or slave multidrop device
where pp is 1 or 9, and c is A or B
* Default
17.11 Super-rate configuration for DNIC or 2B1Q modules
A super-rate circuit occupies more than one contiguous DS0 channel on a primary
rate link. Each module position represents two DS0 channels, or 128 kb/s of
bandwidth. A super-rate speed of 128 kb/s is available to a DNIC module connected
to 2600 MainStreet series DTUs that support super-rate speeds, or a 2B1Q module
connected to 2700 MainStreet series DTUs that support super-rate speeds. All DNIC
and 2B1Q super-rate connections require two contiguous primary rate channels.
The 2902 MainStreet system performs delay equalization through resources on the
Control card.
Super-rate circuits on a DNIC or 2B1Q module are subject to the following
limitations.
•
Super-rate speeds can be configured for DTU port A, port B, or both. However,
only one port may be cross-connected at any one time. If one port is configured
for a super-rate connection and you try to connect the other, the system displays
an error message.
•
If the circuit is already connected, the interface speed and transport bandwidth
cannot be changed.
•
Protection switching for super-rate circuits is not supported.
•
Tandem super-rate connections (connections between two primary rate modules)
are not supported on the 2902 MainStreet system.
For information on connecting super-rate circuits, see section 23.3. To disconnect a
super-rate circuit, see section 23.6.
Configuration overview
To configure a circuit for super-rate:
1 Configure the circuit for transparent rate adaption.
2 Set the transport bandwidth.
SLAVE DISABLE* MASTER
CONFIG — CIRCUIT — < pp-c >
↵
— FUNCTION — I/F_MODE — MULTIDROP
SK000501