Section 365-262-205
9
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Note
20a.
For 3652–62: E-lead conditions: (Both E, E2)
BUSY: Leads E & EB, E2 & EB2 shorted
IDLE: Leads E & EB, E2 & EB2 open
For Types I & III trunk, connect Z to Z2 (EB & EB2 grounded)
For Type II trunk, connect Z to Z3 (E/E2 & EB/EB2 dry contact)
Tandem Mode: Busy, Ground; Idle, open
20b.
For 3652–68: E-lead conditions:
BUSY: Leads E & EB shorted
IDLE: Leads E & EB open
For Types I & III trunk, connect Z to Z2 (EB grounded)
For Type II trunk, connect Z to Z3 (E & EB dry contact)
Tandem Mode: Busy, Ground; Idle, open
21a.
For 3652–62: Options P and W are used to select the proper idle out/busy out sequence of the E-leads (M-leads for tandem mode) when
Carrier Group Alarm (CGA) is activated due to an alarm condition in the channel bank.
E-Lead Sequence
Option Condition
E-lead idled out immediately upon CGA.
Connect P TO P3
E-lead busied out immediately upon CGA.
Connect P TO P2
E-lead idled out immediately upon CGA and busied out after 2.5 sec.
Connect P TO P1
E2-lead idled out immediately upon CGA.
Connect W TO W3
E2-lead busied out immediately upon CGA.
Connect W TO W2
E2-lead idled out immediately upon CGA. Busy 2.5 seconds later.
Connect W TO W1
21b.
For 3652–68: Option P is used to select the proper idle out/busy out sequence of the E-lead (M-lead for tandem mode) when Carrier
Group Alarm (CGA) is activated due to an alarm condition in the channel bank.
E-Lead Sequence
Option Condition
E-lead idled out immediately upon CGA.
Connect P TO P3
E-lead busied out immediately upon CGA.
Connect P TO P2
E-lead idled out immediately upon CGA and busied out after 2.5 sec.
Connect P TO P1
22.
Switch S2 provides E-and M-lead reversal.
M-LEAD TO PIN 45 (J3 RING)
S2 NORM
E-LEAD TO PIN 4 (J3 TIP)
S2 NORM
23a.
For 3652–62: When the channel unit is removed from its mounting slot, the E-lead (Pin 4) and the E2-lead (Pin 2) are grounded through
a shorting contact in the backplane connector. A busy condition is transmitted to both far-end E-leads.
23b.
For 3652–68: When the channel unit is removed from its mounting slot, the E-lead (Pin 4) is grounded through a shorting contact in the
backplane connector. A busy condition is transmitted to the far-end E-lead.
24.
For 3652–62: A busy condition may be sent to the far-end E2- lead for test purposes by connecting option N to N1. This disconnects the
office M2-lead and busies the far-end E2-lead. Connect option N to N2 for normal operation.
25.
For 3652–68: Trunk process relay is activated immediately due to an alarm condition in the channel bank. Two seconds later it is deacti-
vated for 70 milliseconds and again activated. During the activated mode, leads designated as 1 and 2 are shorted:
Lead 2 Ground: Close Y
Lead 2 Open: Open Y
26.
For 3652–68: When the channel unit is removed from its mounting slot, the lead designated as 1 (Pin 2) is grounded through a shorting
contact in the card connector.
4.3.5.
E2-Lead Signaling (Receive)
The information received via the carrier facility appears on the RDATA lead. A logic 1 detected by the DECODER
circuit on the B highway will cause the E2 RELAY to operate, looping the E2-lead to the EB-lead. A logic 0 on the
B highway will cause the E2 RELAY to release, applying an open condition on the E2-lead.
4.3.6.
PLR Signaling (Transmit)
In PLR signaling, an E&M channel unit and a PLR channel unit are operated back-to-back to link two carrier facili-
ties. When in tandem mode, an off-hook condition (ground or loop) on the E-lead of the PLR is applied to the m-
lead DETECTOR circuit via the NORM/BUSY switch. This causes a logic 1 state to be transmitted on both A and
B highways for the 3652–68 (only the A highway on the 3652–62) by the ENCODER circuit with the outgoing bit
