IBM System/34 Maintenance Manual page 499

31-473 Timing Option and Test/Operate Jumpers
. Clear to Send Jumpers
I
I
Basic Timing Options
C 0
A
G H
J P
M N N N
K
a
L N
N N
B·A 1 K2 (line 1)
B·A2K2 (line 2)
• R • • T •
Switched Timing
(echo clamp)
B·A 1 H3 (line 1)
B·A2H3 (line 2)
J
1
4
I
Feature Timing Options
A, B 8.5 ms
A,D 25 ms
B,C 75 ms
C,D
147 ms
L
75 ms SNBU
M 147 ms SNBU
Carrier Detect Jumpers
G, H - Needed for every option
Remaining Jumpers
(SNBU timing)
B·A 1 K3 (line 1)
B·A2K3 (line 2)
I
J
K
p
Q
R
S
Echo LL Clear To
Modem Suppressors?
Send (ms)
6,7
4WLL-SNBU
-
8.5
2
25
5,7
-
8.5
2
4WLL-SNBU
25
2WLL-SNBU NO 75
3
147
YES 75
3
147
2WLL-SNBU
-
75
3
147
Switched
-
Network
CADUCEE
-
25
2WLL
4WLL
SNBU
SNBU
2~wire
nonswitched line
4-wire nonswitched line
With SNBU
Without SNBU .
-
4·wire
2·wire
Short carrier detect, no echo clamp
56 or 123 ms carrier detect, no
echo clamp
50 ms echo clamp (100 ms if not
strapped)
No echo clamp during nonswitched
line operation
SNBU/Switched
Timing Options
Network Clear
To Send (ms)
Strapping
A, B, G, H, J, P
A, 0, G, H, J, P
75' A, B, G, H,
J,
L, R, S
147 A, B G, H,
J,
M S
75' A,
0,
G, H,
J,
L, R, S
147
A,
DIG, H .• J,
1\11,
S
B,C,G,H,K,Q
COG
~.K,
Q
B,C,G,H,K,P
CDGHKP
75' B,C,G,H,K, L,R
147 B, C, G, H, K, M, R
147 CDGHKM
75
3
B, C, G, H, K, R, T4
147
C, 0, G, H, K, T4
A,
0,
G, H,
J,
P
1
Permissible only if SNBU operation is in the local area.
2
Used only on multipoint tributary modems when 'new sync' is used at the control station.
3
Used only on short lines, where turnaround is critical and the communications facility characteristics are suitable (minimum echo).
4
This jumper is installed if any modem in the network does not have the switched network sequence engineering change.
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5
For all except a multipoint tributary modem, the continuous carrier board jumper must be installed (see 31·200 or FSL page AC395).
6 For all except a multipoint tributary modem, the communication adapter card must be set for continuous carrier (see 31·200).
~~'
71f New Sync is required (multipoint control modems only), see paragraph 31-472 for required T2 card jumpers and 01 A·A2 board jumpers.
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40
31-473