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61225001L1-5D

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The NTU provides framing on the E1 port as
described in G.704 (sections 2.3 and 5) and G.706
(section 4) and G.736.  In this mode, the data arriving
at the SHDSL interface need not contain any G.704
framing and the NTU generates the framing.  One or
more services can be routed into time slots 1-31.

CRC-4 multiframe may be enabled or disabled.  The
default is disabled.  The NTU routes one or more
services from the SHDSL payload into time slots
1-31, as well as routing time slot 0.  In this mode
G.704 framing is present in the data arriving on the
SHDSL interface, and this is passed transparently to
the G.703 interface.

NOTE

Not all time slots are necessarily routed between
the SHDSL and G.703 interface – some may be
routed from the SHDSL to the Nx64K interface.
See the 

CRC-4 Multiframe

 subsection.

The NTU monitors the G.704 framing to detect errors
(and thus drive the NTU LEDs) and to determine the
value of the TS0 spare bits.  The NTU transfers all
SHDSL payload time slots transparently through the
G.703 port without framing or monitoring.  In this
mode the port operates as a 2 Mbit/s G.703 interface
without any G.704 framing.  This implies that the
whole SHDSL payload comprises a single service.

The following alarm conditions can be monitored on
the G.703/G.704 interface (if applicable to the current
configuration):

1. AIS (Alarm Indication Signal)

2. BER (Excessive Bit Error Rate)

3. LOMFA (Loss of Multi-Frame Alignment)

4. LOF (Loss of Frame)

5. LOS (Loss of Signal)

6. RAI (Remote Alarm Indication)

7. Slip

When the NTU is configured for an unframed service
the only alarm available is LOS.  Consequential
actions can only be undertaken if G.704 framing is
either delivered by the remote unit or is being
generated on the NTU.  If framing is being generated
by the LT then the LT is responsible for these actions.

While any of the alarm states LOS, AIS, LOF,
LOMFA and BER are detected, the following
consequential actions will occur:

1. The remote alarm indication (bit 3 of the TS0

B- word) will be set as described in the G.704,
G.726 and G.706;

2. The G.703/G.704 alarm LED will be on,

3. AIS will be transmitted toward the network in all

corresponding data time slots.

NOTE

RAI assertion by the NTU can be disabled (the
default state) under the G.703 Options Screen by
the Customer RAI generation option.

When remote alarm indication is detected, the alarm
condition will be displayed on the front panel.

Summary of Contents for Express 6530

Page 1: ...03 V 35 or X 21 interfaces and can be provisioned to support simultaneous G 703 and Nx64 services The SHDSL interface is designed to operate from 192 kbps to 2 304 Mbps in 64 kbps increments or from 3...

Page 2: ...n o c s i e c i v r e S R E B 3 E 0 1 R E B H A O L S I A S O L y l l a m r o n g n i t a r e p o t o n s i e c a f r e t n i d n a d e r u g i f n o c e c i v r e S K 4 6 x N f f O n e e r G d e R d...

Page 3: ...only occur if enabled via the management interface The Local Loop Err Inj Remote Loop and BERT buttons will initiate terminate tests and the corresponding LEDs indicate the status of tests on this por...

Page 4: ...i t c e n n o C o N 8 7 6 The 120 ohm balanced G 703 port uses a RJ 45 connector with the pinouts defined in Table 4 The G 703 port supports a 2048 Kbps port using a 120 ohm balanced interface that co...

Page 5: ...D e v i e c e R 2 D X T a t a D t i m s n a r T 3 R T D o t d e t c e n n o c y l l a n r e t n I y d a e R l a n i m r e T a t a D R S D d n a D C D 4 D N G d n u o r G l a n g i S 5 R S D D C D o t...

Page 6: ...O T N 1 4 1 k c a b p o o L l a c o L O T L 2 4 1 r o t a c i d n I t s e T M O R F N N Table 7 V 35 Pin Connections r e b m u N t i u c r i C e m a N t i u c r i C E C D m o r F o T B A t u o n i P...

Page 7: ...WARNING Risk of Electric Shock When Using a 2 Wire AC Power Connection the Green Yellow Earth Ground Wire Must Be Attached to the P6 2 Wire Quick Connect Post DB 15 IEC 320 E L N STRAP MAP FACTORY DE...

Page 8: ...Nx64K ETC 1 Internal 3 G 703 RX Clock 2 SHDSL Options 1 Unit Options 3 G 703 Options 5 Test Options 4 Nx64K Options NTU LTU 1 Unit Mode 2 Cross Connect Map 3 LT Mode Clock Source 4 Circuit ID 5 Date...

Page 9: ...e framing will be locally generated if 32 is entered in the G 703 TS0 slot only If 32 is entered in the G 703 TS0 and the SHDSL TS0 then the framing will be passed transparently between the G 703 and...

Page 10: ...n a service having the same delay An example is illustrated in Figure 7 All unused time slots contain a configurable bit pattern that is set via the management interface The default bit pattern is all...

Page 11: ...32 N A TS8 1 TS20 1 TS9 1 TS21 1 TS33 N A TS9 1 TS21 1 TS10 1 TS22 1 TS34 N A TS10 1 TS22 1 TS11 1 TS23 1 TS35 N A TS11 1 TS23 1 Timeslot Assignments Commands 0 Idle A Apply New Map G Full G 703 Servi...

Page 12: ...SHDSL port and the Customer direction is always away from the SHDSL port Figure 10 Full Nx64K 2 Mbps Service Circuit ID 01 Jan 00 23 41 06 Unit Mode NT Provisioning Type Local Cross Connect Map SHDSL...

Page 13: ...statistics and restarts the BERT In addition to the commands the following statistical information is provided Bit Error Rate Total number of bit errors divided by the total number of bits in the curr...

Page 14: ...TU and provides a loopback at the LTU in the customer direction Figure 17 AIS signal is injected into the network side Figure 16 Local Customer Nontransparent Loopback NTU Tx AIS LTU Figure 17 Remote...

Page 15: ...Control Leads C141 LL On Initiates a Local Customer Loopback per the Nx64K port Loopback Type Option setting C141 LL Off C140 RL On Initiates a Remote Network Loopback per the remote unit Nx64K port...

Page 16: ...When less than 32 time slots are configured on the G 703 port the NTU bases the CRC 4 detection generation on filling the unused time slots with a fixed pattern configurable via the management interfa...

Page 17: ...it s G 703 interface without any G 704 framing This implies that the whole SHDSL payload comprises a single service The following alarm conditions can be monitored on the G 703 G 704 interface if appl...

Page 18: ...1 Bit Rate 2 048 Mbps Connector RJ 45 120 ohm Balanced Interface Framing G 703 CCS CRC 4 enable disable Unframed Craft Port Bit Rate 2 4 kbps to 38 4 kbps Connector DB 9 Female V 28 Agency Approvals K...

Page 19: ...3 8000 voice 256 963 6300 fax 256 963 8200 fax back international adtran com Asia Pacific Hong Kong 852 2824 8283 voice 852 2824 8928 fax sales asia adtran com Asia Pacific Melbourne Australia 613 965...

Page 20: ...20 61225001L1 5D...

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