CHAPTER 3 NDA-24296
Page 502
Revision 1.0
PA-4ILCH
ISDN Line Circuit
4. Lamp Indications

The contents of lamp indication on this circuit card are shown below.

Note: Establishment of synchronization on U Reference Point may require 30 seconds or more.
LAMP NAME COLOR MEANING
OPE Green Lights when the card is in normal operation.
NOPE Red Lights when the card is in make-busy state.
BLn2 n=0~3
Green Lights when B2 channel of line #n is communicating.
Flashing Flashes during make-busy state (60 IPM).
Off During idle state.
BLn1 n=0~3
Green Lights when B1 channel of the line #n is communicating.
Flashing Flashes during make-busy state (60 IPM).
Off During idle state.
LYRn n=0~3
Green Lights when layer 2 link of the line #n is established.
Flashing
Fla shes wh en s y nchr oniza ti o n is e stabli s h ed on La yer 1 o f S Re f e rence Point (60
IPM). Note
Fla shes wh en s y nchr on i zation i s e s tabli shed on Layer 1 of U Re f erence Point (120
IPM). Note
Off Synchronization is not established on either Layer 1 or Layer 2.
BERnn=0~3
Red Two or more CRC errors occur per second and the condition lasts for 10 seconds.
Off One or no CRC error occurs per second.