E&m switch settings -12, Interface, Table 13-5 – Cabletron Systems 1800 User Manual

Page 210

13-12

SmartSwitch 1800 4. 0 User G uide, Rev 01

The E&M types are described in

Appendix C

Interface

specifies (in conjunction with

Telephony Interface Type

) the type of interface that will

be used by the Voice channel. Valid selections are listed below:

Telephony Interface Type Interface

OPX

(FXO)

Loop Start

SLT

(FXS)

Loop Start

E&M

4W E&M, 4W E&M TE, 2W E&M, 2W E&M TE

AC15

AC15A or AC15C

Loop Start

and

OPX

operating modes provide characteristics similar to those of a

central office.

Loop Start

and

SLT

operating modes provide characteristics similar to

those of a standard telephone set.

4W E&M

is the normal setting for a PBX E&M tie-line interface that uses one pair of

wires for the incoming voice signal and another pair of wires for the outgoing voice
signal.

2W E&M

is for an E&M tie line that uses a single pair of wires for both the

incoming and outgoing voice signal.

AC15A

AC15C

are 4-wire signaling systems used by PBXs to communicate with

each other and other PBX-like communications equipment

2W E&M

and

4W E&M

can be configured in these modes, via the switches on the front

of the SmartSwitch:

●

2W E&M

4W E&M

IS (Immediate Start), the industry standards for E&M oper-

ation.

●

2W E&M

4W E&M

DD (Delay Dial), which will cause the SmartSwitch will

expect an attached PBX to raise its M-lead to request a dial register. The Smart-
Switch will respond as follows: 1) toggle the E-lead, 2) send a dial register to
the PBX, 3) return the E-lead to its original state, and 4) wait for dial digits from
the PBX (no dial tone is transmitted to the PBX).

●

2W E&M

4W E&M

WS (Wink Start), which will cause the SmartSwitch will

expect an attached PBX to raise its M-lead to request a dial register. The Smart-
Switch will respond by sending a dial register to the PBX. When the PBX indi-
cates it is ready for dial digits (no dial tone is transmitted to the PBX), the
SmartSwitch will toggle the E-lead. When the E-lead returns to its original state,
the PBX will transmit dial digits to the SmartSwitch.

2W E&M TE

4W E&M TE

(Timed E&M) are specified, you can specify a delay at

which the E-Lead follows the M-Lead (See

TE Timer

below).

Table 13-5 E&M Switch Settings

E&M
Type

Voice Port 2

Sw. 8

Sw. 7

Sw. 6

Sw. 5

Voice Port 1

Sw. 4

Sw. 3

Sw. 2

Sw. 1

Down