Typical cable characteristics, Replacement parts – GAI-Tronics 491-204 Mine Dial / Page Phone User Manual
Page 9
Pub. 42004-195E
Model 491-204 Mine Dial/Page Telephone
Page:
9 of 9
f:\standard ioms - current release\42004 instr. manuals\42004-195e.doc
04/10
Typical Cable Characteristics
The table below defines cable size with cable characteristics to achieve increased operating distance and
is dependant upon the type and quality of cable utilized, optimum cable line installation and PBX.
Cable Size
DC Resistance
Inductance
Capacitance
(conductor to conductor)
Maximum
Cable Length
No. 22 AWG
16.5 ohms per
1000 feet
Maximum 0.20
µH/foot
Maximum 35 pF/foot
15,750 feet
(~3 miles)
No. 18 AWG
7.1 ohms per
1000 feet
Maximum 0.20
µH/foot
Maximum 35 pF/foot
31,500 feet
(~6 miles)
No. 14 AWG
2.8 ohms per
1000 feet
Maximum 0.20
µH/foot
Maximum 35 pF/foot
63,000 feet
(~12 miles)
Replacement Parts
Part Number
Description
10415-101
Handset
Assembly
12502-101
Replacement Receiver Kit
12504-010
Keypad Replacement Kit - Models 491-103, 491-104, and 491-204
12506-003
Speaker Replacement Kit
12567-001
Page
Switch
61507-009
Harness
Assembly/Subset
69491-002
Keypad Amplifier PCBA
69491-401
Speaker Amplifier PCBA
- 370-201, 372A Interface Amplifier Assembly (10 pages)
- 13314-001 and 13314-002 Div. 2 Hazardous Area Speaker Assembly using 13314 Driver (3 pages)
- 230-001 Pole-Mounting Kit (3 pages)
- Electro Sound Electro-Sound Communication System (9 pages)
- 13314-004 Div. 2 Hazardous Area 100-Volt Horn Driver (5 pages)
- XGM003A Gooseneck Microphone Kit (2 pages)
- XGM003A Gooseneck Microphone Kit (26 pages)
- XGM003A Gooseneck Microphone Kit (5 pages)
- 9974 Junction Box (5 pages)
- 232-001 Pole Mounting Kit (3 pages)
- 13411-001 and 13411-002 Replacement Voice Coil / Diaphragm Assemblies (5 pages)
- 726-101 Single Party Desktop Subset (5 pages)
- 726-101 Single Party Desktop Subset (4 pages)
- 478-002 Centra-Page Desktop Subset (6 pages)
- 239WM-002 Slim Wall-Mount Stanchions (5 pages)
- 239WM-002 Slim Wall-Mount Stanchions (6 pages)
- 239WM-002 Slim Wall-Mount Stanchions (4 pages)
- 239WM-002 Slim Wall-Mount Stanchions (4 pages)
- 210-001 Corridor Telephone (10 pages)
- 239WM-002 Slim Wall-Mount Stanchions (10 pages)
- Speaker / Horn Installation for GAI-Tronics Communication System (8 pages)
- 700 Series 120 V AC Page/Party Systems (10 pages)
- 700 Series 24 V DC Page/Party Systems (14 pages)
- 703-002 Multi-Party 24 V DC Amplifier Enclosures (13 pages)
- 703A Indoor Multi-Party 115 V AC Amplifier Enclosure (8 pages)
- 703A Indoor Multi-Party 115 V AC Amplifier Enclosure (3 pages)
- 723-003 24 V DC Remote Handset/Speaker Amplifier (7 pages)
- 723-001 Remote Handset / Speaker Amplifier (3 pages)
- 237-001 Plug-in Power Supply for Telephones (3 pages)
- 733-002 Single Party 24 V DC Amplifier Enclosure (13 pages)
- 7855-001 Explosion-proof Handset Stations (13 pages)
- 7855-002 24 V DC Explosion-proof Page/Party Handset Stations (14 pages)
- 670-001 Explosion-proof Page/Party Speaker Station (9 pages)
- 670-002 24 V DC Explosion-proof Page/Party Speaker Station (10 pages)
- 13351 Integral Loudspeakers (5 pages)
- 305-001 Line Balance Assembly (3 pages)
- 272-001 Intrinsically-Safe Telephones (13 pages)
- 713-102 24 V DC Page/Party Remote Speaker Amplifier (5 pages)
- 263-000 Isolation Barrier Unit (I.S. Phone) (14 pages)
- 774-001 Portable Station Enclosure (Page/Party) (5 pages)
- 234SBA 234SBA Stanchion Broadcast Assembly (12 pages)
- 773-001 Outdoor Jack Station (Page/Party) (3 pages)
- 491 Series Mine Dial / Page Phone Interface Cabinet (23 pages)
- 268-001 Intrinsically-Safe Telephone Rack-Mount System (14 pages)