4
September
2004
TIM1-A2-GZ40-00
Verifying the TIM1500 Switch Settings
The TIM1500 has a bank of eight switches at the rear of the module (opposite the
faceplate). Switches are numbered from left to right, 1–8. All eight switches should
be in the default up (ON) position. Switches 1 and 4–8 are not used.
NOTE: TIM1500s with printed circuit boards (PCBs) at revision level 810-0000AA
have eight switch banks. For PCBs with eight switch banks, the following sections
(
Switch 2
and
Switch 3
) refer to switches in the switch bank labeled SW 7. All
switches on the other seven switch banks should be in the default up (ON)
position. PCBs at any revision level other than 810-0000AA have only one switch
bank.
Switch 2
CAUTION: Switch 2 indicates to the Multiplexer Uplink Module (MUM) in the same
chassis that the module is a T1 inverse multiplexer. The switch must be in the up
(ON) position. The TIM1500 will not link up if Switch 2 is in the down position.
Switch 3
Switch 3 indicates to the MUM whether the TIM1500 will be acting as a T1
provider or a T1 subscriber. The default up (ON) position specifies that the
TIM1500 acts as a provider. In most cases, this is the desired setting. The
TIM1500 can, however, be configured to act as a T1 subscriber, if so desired, by
placing Switch 3 in the down (Off) position.
NOTE: You cannot set speed or timing configurations on a TIM1500 in subscriber
mode. These settings will be determined via each port's communication with its
respective partner T1 provider.
Provider Mode Subscriber Mode