Lucent Technologies SLC ConnectReach User & Service Manual page 49

Product Description
Physical and Functional Description
Interfaces (Continued)
Voice interfaces
(continued)
Data interfaces
It is also possible for blocks of contiguous DS0 time slots to be routed to the
secondary T1/DSX-1 port. A single block of voice time slots may be specified for
mapping to the secondary T1/DSX-1 port. The SPQ440 or SPQ443 channel unit
will be specified to handle these time slots so that the SLC-2000 HDT will transmit
the standard extended superframe (ESF) signaling format. The ESF signaling
format is required since the PBX connected to the secondary T1/DSX-1 line will
be expecting it.
The SLC ConnectReach system can also emulate an SPQ452 data channel unit.
Unlike the SPQ452 channel unit, however, there are no digital data services
(DDS) or sub-64 kb/s interfaces on the SLC ConnectReach system. Data may
either be routed to the Ethernet port using the built-in internal router or be mapped
to time slots on the secondary T1/DSX-1 line. Additionally, some combination of
these two paths is also possible. If data is mapped to the secondary T1/DSX-1
line, a router must be attached to that line either directly or by means of a DS0
add/drop unit. Data transmitted on the secondary T1/DSX-1 line is in the clear
channel format.
Even though the SPQ452 channel unit is a dual port unit, the SLC ConnectReach
system allows up to four DS0 signal time slots to be mapped to data for every
SPQ452 channel unit emulated.
If data speeds above 64 kb/s are required, contiguous DS0 signals can be used to
provide a higher speed channel in multiples of 64 kb/s.
363-208-050
Issue 4 June 2002 2-7