
XRT84L38
362
OCTAL T1/E1/J1 FRAMER
REV. 1.0.1
Figure 118
below is a timing diagram of the TxOH_n input pin.
11.4.3.4
Insert Signaling Data from TxSer_n Pin
Depends on applications, the Terminal Equipment can embed signaling information into the E1 PCM data and
then send the data to the XRT84L38 framer device. In this case, the user should configure the framer not to
insert any signaling data. The input E1 PCM data will then be directed to the Transmit LIU Interface without any
modifications.
11.4.3.5
Enable Channel Associated Signaling and Signaling Data Source Control
The Transmit Signaling Control Register (TSCR) of each channel selects source of signaling data to be
inserted into the outgoing E1 frame and enables Channel Associated signaling. As we mentioned before, the
signaling data can be inserted from Transmit Signaling Control Registers (TSCR) of each timeslot, from the
TxSig_n input pin, from the TxOH_n input pin or from the TxSer_n input pin. The Transmit Signaling Data
Source Select [1:0] bits of the Transmit Signaling Control Register (TSCR) determines from which sources the
signaling data is inserted from.
The table below shows configurations of the Transmit Signaling Data Source Select [1:0] bits of the Transmit
Signaling Control Register (TSCR).
TRANSMIT SIGNALING CONTROL REGISTER (TSCR) (INDIRECT ADDRESS = 0XN2H, 0X40H - 0X57H)
F
IGURE
118. T
IMING
D
IAGRAM
OF
THE
T
X
OH_
N
I
NPUT
B
IT
N
UMBER
B
IT
N
AME
B
IT
T
YPE
B
IT
D
ESCRIPTION
1-0
Transmit Signaling
Source Select
R/W
00 - None of the signaling data, the CAS Multi-frame alignment pattern, the
X bit or the CAS Multi-frame Yellow Alarm bit Y is inserted into the outgo-
ing E1 PCM data by the framer. However, the user can embed the signal-
ing data, the CAS Multi-frame alignment pattern, the X bit or the CAS
Multi-frame Yellow Alarm bit Y into E1 PCM data before routing the PCM
data into the framer.
01 - The signaling data, the CAS Multi-frame alignment pattern, the X bit or
the CAS Multi-frame Yellow Alarm bit Y is inserted into the outgoing E1
PCM data from TSCR register of each timeslot.
10 - If the XRT84L38 framer is operating in E1 2.048Mbit/s mode and if the
TxFR2048 bit of the Transmit Interface Control Register (TICR) is set to
zero:
The signaling data, the CAS Multi-frame alignment pattern, the X bit or the
CAS Multi-frame Yellow Alarm bit Y is inserted into the outgoing E1 PCM
data from the TxOH_n input pin.
If the XRT84L38 framer is operating in E1 2.048Mbit/s mode and if the
TxFR2048 bit of the Transmit Interface Control Register (TICR) is set to
one:
The signaling data, the CAS Multi-frame alignment pattern, the X bit or the
CAS Multi-frame Yellow Alarm bit Y is inserted into the outgoing E1 PCM
data from the TxSig_n input pin.
11 - No signaling data or the CAS Multi-frame alignment pattern is inserted
into the input E1 PCM data by the framer. However, the user can embed
signaling data into E1 PCM data before routing the PCM data into the
framer.
The X bit is inserted into the outgoing E1 PCM data from TSCR register.
The CAS Multi-frame Yellow Alarm Y bit is generated by the XRT84L38
framer depends on operating condition of the E1 link.