Verilink 2048 Installation Guide

®

TRANSPORT

2048 PMU/NTU

Configuration Guide

Part # 45-00031
Rev 1.00

Pattern Select

Pos Patt ern

0QRW
12
22
32
42
52

7

9
15
20
23

61 in 8
73 in 24
9 PROM

Download

®

TRANSPORT

LLB

TST

PLB

TST

ERR

TO

LOC

NET

MON

T

E

D

STATUSPMU/NTU

ACO

E

T

N

FAR

ACO SW

2048

3 4

2 5 6 7 8 9 10 11 12 13 14 1615

1

BV/CR/FE

LOS/LOF

AIS

REM ALM

LOC ALM

NET

FRM

MON

DTE

FRM

TO

DTE

7

8

6

9

5

0

4

1

2

3

PAT SEL

1

6

S

UPV

17

Front Panel Description

1 Status: The green LED ligh ts when the unit is powered and operation is normal. The re d LED lights if an alarm exc ee di ng thresholds is detected.
2 Alarm Cut Off: This yellow LED lights if the Alarm Cut Off switch is pla ce d in the left ‘ON’ position. It indicates that the alarm relay contacts are disabled.
3 ACO Switch: This switch controls the alarm relay circuitry. If the switch is placed in the left ‘ON’ position, this circuitry is deactivated.
4 BV/CR/FE: This LED lights 1 second for each second that has an occurrence of bipolar violations, cyclic redundancy check errors, or frame bit errors.
5 LOS/LOF: Thi s LED bli nks wi th l oss of signal (LOS) from the network or DTE. It light s const an tly when a loss of frame (LOF) condition is detected.
6 AIS: This LED light s if an unframed all ones condition (alarm indicatio n signal) is detected from the network or equipment.
7 Remote Alarm: This LED lights constantl y when a remote (yellow) alarm signal is received from the far end.
8 Local Alarm: T h i s LE D lights when a local alarm exceeding al arm thresholds exist s . It remains lit until the Alarm Reset Timer pe riod ends.

9 LLB: This LE D lights continuously whe n the network interface is in a line loopback. It flashes when the DTE interface is in a line loopback.
10 PLB: This LED lights continuously when the ne twork interface is in a payload loopback.
11 TST: This LED lights continuously during a far or local test. It flashes when loop codes are transmitted at the start of a ‘far’ test and when unloop codes are

transmitted at the end of a ‘far’ te st.

12 ERR: This LED lights for 1 second when BE RT pattern errors are received during a ‘Far’ test.
13 Test Switch: This switch is used for local testing. If transmi tt ing IB L C, the test LED blinks. If transmit ti ng a test pattern, it lights con ti nuously.
14 Test Jacks: These jacks prov ide access to the T1 li ne on the DTE side – th e top 2 jacks break c onnection to the DTE and make connection to the unit in the direc ti on

of the network, the midd l e 2 ports monitor the signal s passing through the unit, and the bottom 2 ports br eak connection to the unit and make connection to the DTE.

15 Activity LEDs: These 2 small, recessed LEDs are provided to indicate supervisory and NMS port activity.
16 SUPV: This 6-pin supervisory jack provides di re ct ter minal access for PMU control and to gathe r status/facility performan ce dat a.
17 Pattern Select: This rotary swit ch det er mi ne s the BERT pattern sent by the unit when the test switch (Item 14) is in the ‘FAR’ position. Refer to th e ta ble above.

Specifications

Network Interface

Line Rate: 2.048 Mb/s, ± 50 ppm, P CM -30
Multi -frame Type: CAS and/or CRC4, or none
Line Code: AMI or HDB3
Connection: 120 ¾ balanced or 75 ¾ unbal.
Backplane: DB15, Twin-axial, and BNC
Output Signal: 75¾ mark 2.37 V, space 0±0.237 V

(per G.703) 120 ¾ Mark 3 V, Space 0 ± 0.3 V
Line Build Out: 0, - 7. 5, -1 5 dB switch settings
Input Signal: 75 ¾ mark 2.37V, space 0 ±0.237V

(per G.703) 120 ¾ Mark 3 V, Space 0 ± 0.3 V

attenuated by 0 to -27 dB (ALBO)
Jitter Attenuation: per CCITT G.823
AIS: Unframed or framed all ones, or

(user selectable) line loopback
Overvoltage: 1000 V minimum protection

Equipment

Line Rate: 2.048 Mb/s, ± 50 ppm, P CM -30
Multi-frame Type: CAS and/or CRC4, or none

Interface

Line Code: AMI or HDB3
Output Signal: 75¾ mark 2.3 7 V, space 0±0. 237 V

(per G.703) 120 ¾ Mark 3 V, Space 0 ± 0.3 V
Pulse Width: 244 ns, nominal
DTE Input Signal: 75¾ mark 2.37V, space 0 ±0.237V

(per G.703) 120 ¾ Mark 3 V, Space 0 ± 0.3 V

attenuated by 0- 6 dB @ 1024 kHz
Connection: 120 ¾ balanced or 75 ¾ unbalanced
Backplane: DB15, Twin-axial, and BNC
AIS: Unframed or framed all ones, LLB
Overvoltage: 1000 V minimum protection

Diagnostics

Line Loopback: Signal regeneration only
Payload Loopback: Signal regenerated with new frame

synchronization and CRC4
BERT: 63, 511, 2047 , 2

23

, QRW, and ALT

2

15

(default), 220,

BERT Activation: Front panel switch, user selection of

patterns via command. Pattern sync

/ bit errors reported via command.

Loopback Control: Inband loop up, 00001 for Ý 5 sec

Inband loop down, 001 for Ý 5 sec
User enable/dis able, Manual loop
back switch, FDL loopback comnd.

PTT and EM8000 Full ESF performance monitori ng

through 6-pin RJ11 termi nal port,
and via FDL in sele cted national bi t

Alarms

Contacts: Normally Open or Normally Closed

(screw terminal connection)
Activation: Programmable
Reporting: Through TxPORT EM8000
Cut Off: Manual, 2-position switch

Local

Power

-48 VDC (± 10%), 75 mA max (screw terminal)

Mechanical

Mounting: Wall, horizontal or vertical rac k
Dimensions: 1.75" W, 6.0" H, 11.75" D
Weight: 1 pound

2048 PMU Rear Panel (with DB15)

J

4

8

P

E

T

Q

1

6

1

IN

15

9

USER

Equipment/Network Connection

Pin EQPT DB15 NET DB15

1 Data In Data Out
2 Frame Ground Frame Ground
3 Data Out Data In
4 Frame Ground Frame Ground
9 Data In Data Out

11 Data Out Data In

Switch SW2

5

6

4

3

8

2

179

0

Switch S1:

PTT should provide the proper setting. Check the box which corresponds
to your LBO setting. If unsure of the exact setting, then slide to 0 dB.

Sets the output signal level (LBO) of transmitted data. The

Pin EQP T RJ48 NET RJ48

1 Data Out Data In
2 Data Out Data In

3/6 Not Used Not Used

4 Data In Data Out
5 Data In Data Out

7/8 Chassis Gnd Chassis Gnd

Switch S4

18765432

S1

6

1

IN

OUT

OUT

PTT

Pin NMS In /Out NMS Out

1 Not Used Not Used
2 Signal Gnd Signal Gnd
3 Data Out Data Out
4 Data In Not Used
5 Signal Gnd Signal Gnd
6 Not Used Not Used

Circuit Board View

Switch S5

18765432

P

1

9

1

User/PTT Connection

Switch S6

18765432

Switch S2:

Tx/Rx pair for either normal stand-alone
use or for chassis nest mount use.

This switch swaps the DTE

NORM RACK

2

E

T

N

8

15

Power/

6

Power/Alarm

Pin Function

1 48 VDC Return
2 Signal Ground
3 -48 VDC
4 Frame Ground
5 Alarm Contact
6 Alarm Common

Switch S7

18765432

S2

Alarm

75 ¾ Jumper Configuration

Front

J5
J6

J7
J8

Equipment

Network

J18

NO NC

J14

J15

J16

Rear

J4

J12J13

Alarm Relay: Pin 5 on the
P ower/Alarm terminal strip is
configured to operate either in
a normally open (NO) or a
normally closed (NC) mode as
determined by Jumper J18.

120 ¾ Jumper Configuration

Front

J5
J6

J7
J8

Equipment

J4

-15 -7.5 0

NOTE: F or futur e refer enc e, all DIP switches ar e
provided with upper and lower boxes to check
according to the particular user selec tion. F actory
default settings are shown underlined

.

NOTE: On all switches, the ‘Up’ or ‘1’ position is
OPEN and the ‘Dn’ or ‘0’ position is CLOSED.

Configuration Switch S4

7

Dn Up

Spares

Pos 1 Pos 2 Configuration Mode

Dn Dn Boot from switches
Dn Up Download from manager
Up Dn Boot from RAM
Up Up Boot from ROM

Address Switch S7

MSB LSB

64

32

16

8

4

2

1

7

Dn Up

8654321

128

8654321

Configuration Switch S5

Dn Up

Sets the BERT data polarity to a ‘1’ or ‘0’.

S5-1:

- 1 Up - 0 (inverted)

Down

IBLC - Enables the inband 5-bit loop up

S5-2:

code and 3-bit loop down code detection.

Down

- Enabled Up - Disabled

Matches the PMU to the line framing used.

S5-3:

- CAS Up - CCS

Down

Sets the network line code for the E1 signal.

S5-4:

- HDB3 Up - AMI

Down

Enables the CRC4 framing format.

S5-5:

- Enabled Up - Disabled

Down

Pos 6 Pos 7 AIS/Keep Alive Selection

Dn Dn AIS is unframed all ones
Dn Up AIS is framed all ones
Up Dn Line Loopback (LLB)

Enables CRC4 Insert on the network side.

S5-8:

- Disabled Up - Enabled

Down

Switch SW2

Pos Nat’l Bit

11
22
33
44
55

8654321

7

Supervisory Port

(front pan el)

1/6 Not Used

2 Signal Ground
3 Data Out
4 Data In
5 Signal Ground

Configuration Switch S6

Supervisory

Supervisory

User NMS

User NMS

PTT NMS

Dn Up

1.2

2.4

kb/s

kb/s

kb/s

SUPV - 1

User - 3

PTT - 5

Nat’l - 7
Bit - 8

Dn Dn Up Up

- 2

Dn Up Dn Up
Dn Dn Up Up

- 4

Dn Up Dn Up
Dn Dn Up Up

- 6

Dn Up Dn Up

Dn (0) = Pass Up (1) = Select

Select Dn (0) or Up (1) for nat’l
bit if S6-7 is set to ‘Select’

9.6

J13

J14

J15

J16

J12

Network

J18

NO NC

PTT NMS

National bit

National bit

TRANSPORT

Rear

®

TxPORT

127 Jetplex Circle

8654321

7

19.2
kb/s

Madison, Alabama 35758

Customer Service

800-926-0085, ext. 227

Product Technical Support

(8 a.m. to 5 p.m. Central)

800-285-2755 or

205-772-3770

Emergency After Hours

Support: 800-285-2755

INET: [e-mail]