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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Screen reference
602DS1 Circuit Pack
17
TN464C (and later release) circuit packs have an option switch that must be
set to match the entry in the Bit Rate field.
Line Coding
This field selects the type of line coding used on this facility. The setting in this
field must match the setting on the far-end of the link, or you must have an
intervening CSU to convert the line coding protocols. Voice calls will work even if
line coding does not match, but a single data call will bring down the DS1 facility.
For the TTC 2Mb CMI Trunk circuit pack, this is a display-only field showing
cmi (coded mark inversion).
The following information is for reference. Talk with your network service
provider or your Lucent representative to find the appropriate protocol for your
application.
!
CAUTION:
If you change this field, you must busy out the DS1 circuit pack. You must
also change the following screens: Route-Pattern, Access Endpoint, PRI
Endpoint, Signaling-Group, and Trunk-Group.
NOTE:
When the DS1 circuit pack is used for ISDN service, the ISDN D-channel
data is inverted when
ami-basic or ami-zcs is entered and not inverted
when
b8zs or hdb3 is entered.
Valid entries Usage
1.544
Use for T-1 service.
2.048
Use for E-1 service.
Valid entries Usage
b8zs
(bipolar eight
zero substitution)
Enter b8zs for T-1 facilities that support voice and/or data
traffic. Enter
b8zs if you need a 64K clear channel.
ami-zcs (alternate
mark inversion -
zero code
suppression)
Enter
ami-zcs only for T-1 facilities that carry voice
traffic: it is not recommended for digital-data applications.
If you anticipate upgrading this facility to ISDN, use b8zs
line coding if possible.