參數(shù)資料
型號(hào): T9000
英文描述: ISDN Network Termination Node (NTN) Device
中文描述: ISDN網(wǎng)絡(luò)終端節(jié)點(diǎn)(新界北)設(shè)備
文件頁數(shù): 78/126頁
文件大?。?/td> 2127K
代理商: T9000
78
Lucent Technologies Inc.
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
T9000
10 GCI+ Interface Module
(continued)
10.6 GCI+ Loopbacks
DFR (G_L_LBK) and DFR (G_R_LBK) register bits control the loopback mode of the GCI interface.
When the DFR (G_L_LBK) register bit is set, downstream B1/B2 channel is fed back to the upstream B1/B2
channel.
When the DFR (G_R_LBK) register bit is set, upstream B1/B2 channel is fed back to the downstream B1/B2
channel.
Both loopbacks may be set at the same time. Loopbacks are transparent, except in the case when both are active
at the same time. Note that loopbacks only operate over data channels; no other channels will be looped back.
5-6724 (F)
Figure 19. GCI Loopback Logic
0
1
0
1
0
1
0
1
REMOTE LOOPBACK
LOCAL LOOPBACK
GDRIVER
DD_I
DU_I
G_L_LBK
DATA CHANNEL
G_R_LBK
DD_OE
DD
DU
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