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Cisco AS5800 Universal Access Server Dial Shelf Card Guide
78-7097-03 0A
Chapter 6 CT1/CE1 Trunk Card
Configuring Split Dial Shelves
Configuration Scenarios
The following configuration scenarios apply for environments using T3 CAS, T3 PRI, and E1 PRI:
T3 CAS
Option 1: Straight three T3 environment—two T3/ one T3 split
Router shelf 1, two T3s—dial-shelf backplane-ds0 2ct3cas
Router shelf 2, one T3—dial-shelf backplane-ds0 1ct3cas
This setting combination provides 1344 DS0s (four or five UPCs) to one router shelf and 672 DS0s (two
or three UPCs) to the other for a total of 2016 possible analog calls terminated. This leaves 276 spare
ports on the router shelf 1 side, and a shortage of 24 ports on the router shelf 2 side. One DMM card
could be used to provide an additional 24 ports and spares for the router shelf 2 of the split.
Option 2: 3 T3—with 1 T3 demuxed into T1s plus an extra 1 T1 service in addition to the 3 T3s
Router shelf 1, one T3 plus two T1s—dial-shelf backplane-ds0 part2ct1ct3cas
Router shelf 2, one T3 plus one T1—dial-shelf backplane-ds0 part1ct1ct3cas
This setting combination provides 1152 DS0s (four UPCs) to one router shelf and 888 DS0s (three
UPCs) to the other for a total of 2040 possible analog calls terminated. This leaves 144 spare ports on
the router shelf 1 side, and 84 spare ports on the router shelf 2 side. This leaves one empty slot, but does
not require any DMMs to be added. The router shelf load in this configuration is more even than in
option 1.
T3 PRI
Option 3: 3 CT3 environment—Straight two CT3/one CT3 split
Router shelf 1, two T3s—dial-shelf backplane-ds0 2ct3isdn
Router shelf 2, one T3—dial-shelf backplane-ds0 part1ct1ct3isdn_b
This setting combination provides 1288 DS0s (four UPCs) to one router shelf and 644 DS0s (two UPCs)
to the other for a total of 1932 analog calls terminated. This leaves only eight spare ports on the
router shelf 1 side, and four spare ports on the router shelf 2 side. This also leaves three empty slots so
one DMM per side can be added to provide spare modems if required. The router shelf load in this
configuration is somewhat uneven: one router shelf is heavily loaded, the other is at half capacity.