RS8953B Datasheet, PDF (50/173 Pages) Conexant Systems, Inc – High-Bit-Rate Digital Subscriber Line (HDSL) channel unit

3.0 Circuit Descriptions
3.4 Loopbacks
Table 3-1. PCM And HDSL Loopbacks
Loopback
Command Register
PP_LOOP
HP_LOOP
PH_LOOP
PH_LOOP
PH_LOOP
HH_LOOP
HH_LOOP
HH_LOOP
CMD_2; addr 0xE6
CMD_2; addr 0xE6
RCMD_2; addr 0x61
RCMD_2; addr 0x81
RCMD_2; addr 0xA1
TCMD_2; addr 0x07
TCMD_2; addr 0x27
TCMD_2; addr 0x47
RS8953B/8953SPB
HDSL Channel Unit
Test Direction
Receive
Transmit
Receive
Receive
Receive
Transmit
Transmit
Transmit
Loopback Description
PCM Loopback on PCM Side
HDSL Loopback on PCM Side
PCM Loopback on HDSL Channel 1
PCM Loopback on HDSL Channel 2
PCM Loopback on HDSL Channel 3
HDSL Loopback on HDSL Channel 1
HDSL Loopback on HDSL Channel 2
HDSL Loopback on HDSL Channel 3
3-18
Conexant
N8953BDSB