Filter
Top Products
LBI-39224
3-43
T1/E1 Channel Assignment
T1/E1 logical channels are assigned starting with channel 1, these are
the channels used to transmit voice, data, and image signals from one
system node to another. E1 channel 16 is used for signaling if signaling
is enabled. (See "Signaling Type" under T1/E1 Digital Site
Configuration above.) Subrate ports for user data are assigned channels
adjacent/after logical channels according to the table below.
Asynchronous (async) ports, up to 5, are assigned first and then
synchronous (sync) ports are assigned.
Table 2 Subrate Port Assignments for Analog/Modem Mode
Free Channels (Per Card) Subrate Port Auto-configuration*
0 no subrate ports available
1 port 1 = async
ports 2 - 8 = not available
2 port 1 = async
ports 2 - 5 = sync
ports 6 - 8 = not available
3 ports 1 & 2 = async
ports 3 - 5 = sync
ports 6 - 8 = not available
4 ports 1 - 3 = async
ports 4 & 5 = not available
ports 6 - 8 = sync
5 ports 1 - 4 = async
port 5 = not available
ports 6 - 8 = sync
>5 ports 1 - 5 = async
ports 6 - 8 = sync
* "sync" = subrate port set for synchronous operation
"async" = subrate port set for asynchronous operation
Subrate Port Channel Assignment
Asynchronous subrate ports require an individual channel assignment
for each port, however, up to five synchronous subrate ports can be
packed in one T1/E1 channel using DS0B subrate multiplexing. Based
on hardware considerations at the T1/E1 Interface Card, sync ports 1 - 5
and 6 - 8 would be packed in pre-assigned DS0B "sub-channels" as
shown below.