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T1
T1
RDTU3A Call Data Information
Strata CTX I&M 06/04 8-11
Notes
• There are some cases when the RDTU will not receive requests from the central processor unit
(CPU), such as the time waiting for wink signal. When the RDTU attempts to move to a non-
receiving state, the RDTU sends commands to the CPU to stop sending requests. The CPU
stops sending requests until the RDTU cancels the stop. “DDT1” indicates that the RDTU is in
a non-receiving state.
• Dial pulse digits are communicated using A/B bits, so the RDTU can detect and send out from
the monitor port. DTMF digits cannot monitored because they pass through the speech path.
Indicators
When the conditions described in the “Timing” column of the table below occur, the information
in the “Indication” column appears on-screen.
Table 8-8 RDTU3 Indications
Indication
Type
Indication Timing
Alarm
information
ALARM:YAON/OFF BAON/OFF FSLON/OFF
YA = Yellow Alarm
BA = Blue Alarm
FSL = Frame Sync Loss
Occurs when the T1
line alarm state
changes.
When all Alarms are
OFF state, RDTU3A
gets frame sync.
UNIT MODE: FFMxx SCHxx TSxx RPDxxxx TPDxxxx ZCSxx
FFM = Frame format mode
01 = D4 mode 10 = ESF mode
SCH = Sync operation CHannel
01 = Primary CLK extraction channel
10 = Secondary CLK extraction channel
TS = Voice channel number
01 = 8 PCM ch 10 = 16 PCM ch 11 = 24 PCM ch
RPD = Receive digital PAD setting
0001/0010 = +3dB 0011 = 0dB 0100 = -3dB
0101 = -6dB 0110 = -9dB 0111 = -12dB
_______1000 = -15dB
TPD = Transmit digital PAD
0001/0010 = +3dB 0011 = 0dB 0100 = -3dB
0101 = -6dB 0110 = -9dB 0111 = -12dB
1000 = -15dB
ZCS = Zero Code Suppression mode
01 = PZC (Not used) 10 = B8ZS
11 = AMI with ZCS
If you change the card
in programming, the
above indication
information displays.
Channel Trunk
Typ e
Information
CH MODEx-y:Az Az Az Az Az Az
x-y = channel number 0-5/6-11/12-17/18-23
Az = Channel mode
A8 = CO Loop A9 = CO Ground
AA = TIE Immediate AB = TIE Wink
AC = DID Immediate AD = DID Wink
If you change the
trunk type in
programming, the
above data displays.