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DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
Administering ATM-PNC and ATM-CES
5-10Administering DEFINITY ECS
5
Trunk groups
At least one trunk group is typically created for each remote switch with these
attributes (see Screen 5-8
):
■ Group Type
field
is isdn
■ Carrier medium
field
is atm
■ Dial Access?
field is always
n
■ TN2305/TN2306 may have Trunk Access Codes (TAC), but these are for
reporting purposes only and cannot be dialed.
■ CDR records for ATM trunk calls are maintained.
NOTE:
Release 7 introduced 3-digit port numbers for administering a CES
trunk, and CMS cannot read the old 2-digit numbers. Release 8 CMS
software can read both the 2- and 3-digit port numbers.
■ A trunk group may include ports from more than one of the ATM circuit
packs in the system. This enables same module preference, the feature
that gives preference to outgoing trunks on the same port network as the
originator.
■ ATM trunk groups can only contain ports on ATM boards, and ports on
ATM boards cannot be assigned to non-ATM trunk groups.
ATM-CES trunk board
When administered as a trunk board, the TN2305/TN2306 can have up to 8 ATM
signaling groups with up to 30 members per signaling group over an
OC-3/STM-1 connection. Although the ATM board does not have physical ports,
Table 5-7. DEFINITY ECS trunk capacities by model
Capacity c, csi, si r
Maximum trunks per trunk group 99 255
Maximum number of trunk groups 99 666
Maximum number of trunks in the system 400 4000
Continued on next page