Avaya S8700 Maintenance Manual page 1387

DS1-FAC (DS1 Facility)
Bit Rate
This field is used to select domestic T1 operation or international E1 operation for
all facilities in the TN1654 DS1 CONV complex. The field is set to 1.544 Mbps for
T1 operation and 2.048 Mbps for E1 operation.
(This field appears on the fiber-link form only for TN1654 DS1 CONV circuit
packs.)
NOTE:
The TN1654 DS1 CONV circuit pack is also field configurable for T1 or E1
operation. All four DS1 facilities are configured to either T1 or E1 as a group
via an option switch located on the component side of the circuit pack. An
error will be logged and an alarm will be raised if there is a T1/E1
inconsistency between the administered bit rate and the board option switch
setting.
Idle Code
This field is used to set the idle code for all facilities on the TN1654 DS1 CONV
board. This field can accept any combination of ones (1) and zeros (0) with the
exception that the second left-most digit must be set to one (1) at all times.
(This field appears on the fiber-link form only for TN1654 DS1 CONV circuit
packs.)
CRC
This field determines if CRC is enabled for every facility on a TN1654 circuit pack.
The field is set to yes if a cyclic redundancy check (CRC) is to be performed on
transmissions that the board receives.
(CRC only applies to E1 operation. Thus, this field resides on the fiber-link form
only for TN1654 DS1 CONV circuit packs with a bit rate of 2.048 Mbps.)
555-233-143 Issue 1 May 2002 8-665