
To the venue owner – an ERRCS system is an expense with no ROI.
To the Emergency Responder – an ERRCS system is a MUST – with life safety for
responders, AND the public, depending on it.
Comba Telecom is committed to providing highly affordable,
state of the art solutions so venue owners can ensure
that First Responders get the coverage they need and deserve,
while making the cost to the venue owner as low as possible.
Comba's New CriticalPoint 700MHz/800MHz NG (Next Generation) single or dual band channelized Fiber DAS was designed with public safety first responders in mind. Fully compliant with the IFC and NFPA (National Fire Protection Association), CriticalPoint's Fiber DAS system is comprised of a Master Unit (MU) and Remotes Units (RU) in either 0.5 Watt or 2 Watt models providing wireless coverage of millions of square feet in combination with fiber expansion hubs to support up to 32 Remote Units. Similar to our award-winning first generation CriticalPoint Fiber DAS system, the NG platform will also come in Class A or Class B and will be software configurable. What sets the NG platform apart from the previous generation:
- Greatly improved noise factors
- Faster ALC (automatic level control) response time that supports P25 phase 2 per timeslot
- Up to 64 channels per band on single band models; up to 96 channels shared across bands on dual band models (maximum of 64 on individual band) (Class A)
- Fully FCC compliant (<9dB Noise Figure) low gain mode
- A more powerful GUI and tools for commissioning, updating and maintaining the ERCES system
Additionally, the NG system includes a new battery backup unit (BBU), sold separately. The BBU will be offered in either a 30AH, 60AH or 100AH capacity to satisfy a wide range of requirements of local ordinances. The new BBU is powered by the same Lithium iron phosphate batteries (LiFePO4) found in our current Version 2 BBU, however the chassis is 30% smaller and 20% lighter.
Next Generation (NG) Fiber DAS
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Fiber DAS (NG)
Features: • Supports P25 P1/P2, digital and conventional analog communications simultaneously • Built-in cavity filtering to protect the unit from interference from FirstNet Band 14 and other neighbor bands • Support up to 32 Remote Units • Both Master Unit and Remote Units have the same output power for coverage • Up to 64 channels per band on single band models; up to 96 channels shared across bands on dual band models (maximum of 64 on individual band) (Class A) • Channelized (Class A) / Wideband Auto Level Control (ALC) supported • Downlink and Uplink squelch supported • NetProtectTM Uplink PA shutdown during no traffic periods to minimize noise being introduced to the network • Built-in mandatory isolation test to prevent system oscillation • Auto shutdown with alarm upon oscillation detection • Web based GUI for intelligent configuration, SNMP supported • Integrated Battery Charger Unit, Comba BBU V2 / BBU V3/NG supported • License based switching between Class A or Class B, Single band or Dual band, 0.5W or 2W configurations • NFPA / IFC / UL 2524 compliant dry contact alarms and built-in visual / audio annunciator • Additional external Comba Annunciator Panel supported Battery Backup Unit • Optional dedicated Battery Backup Solution for BDA V3/NG platform • Supports Lithium Iron Phosphate (LiFePO4) batteries • Supports 12 hours backup power with 30AH battery option • Supports 24 hours backup power with 60AH battery option • Supports 48 hours backup power with 100AH battery option • Provides connections for EPO (Emergency Power Off) switch • Provides AC convenience outlet inside BBU |
GALLERY |
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Master Unit |
Master Unit |
Master Unit |
Master Unit |
Battery Backup Unit |
Battery Backup Unit |
![]() Fiber Expansion Unit |
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Remote Unit |
Remote Unit |
Remote Unit |
Remote Unit |

Master Unit Part Numbers | Band | Class | DL PWR | Duplexer Configuration |
RX78V3-A3327P0-XX | 700/800MHz | Class A | 33dBm | XX=S1/S0/C0 |
RX07V3-A3327P0-XX | 700MHz | Class A | 33dBm | XX=S1/S0/C0 |
RX08V3-A3327P0-XX | 800MHz | Class A | 33dBm | XX=S1/S0/C0 |
RX78V3-A2727P0-XX | 700/800MHz | Class A | 27dBm | XX=S1/S0/C0 |
RX07V3-A2727P0-XX | 700MHz | Class A | 27dBm | XX=S1/S0/C0 |
RX08V3-A2727P0-XX | 800MHz | Class A | 27dBm | XX=S1/S0/C0 |
RX78V3-B3327P0-XX | 700/800MHz | Class B | 33dBm | XX=S1/S0/C0 |
RX07V3-B3327P0-XX | 700MHz | Class B | 33dBm | XX=S1/S0/C0 |
RX08V3-B3327P0-XX | 700MHz | Class B | 33dBm | XX=S1/S0/C0 |
RX78V3-B2727P0-XX | 700/800MHz | Class B | 27dBm | XX=S1/S0/C0 |
Remote Unit Part Numbers | Band | Class | DL PWR | Duplexer Configuration |
RH78V3-A3300P0-XX | 700/800MHz | Class A | 33dBm | XX=S1/S0/C0 |
RH07V3-A3300P0-XX | 700MHz | Class A | 33dBm | XX=S1/S0/C0 |
RH08V3-A3300P0-XX | 800MHz | Class A | 33dBm | XX=S1/S0/C0 |
RH78V3-A2700P0-XX | 700/800MHz | Class A | 27dBm | XX=S1/S0/C0 |
RH07V3-A2700P0-XX | 700MHz | Class A | 27dBm | XX=S1/S0/C0 |
RH08V3-A2700P0-XX | 800MHz | Class A | 27dBm | XX=S1/S0/C0 |
RH78V3-B3300P0-XX | 700/800MHz | Class B | 33dBm | XX=S1/S0/C0 |
RH07V3-B3300P0-XX | 700MHz | Class B | 33dBm | XX=S1/S0/C0 |
RH08V3-B3300P0-XX | 700MHz | Class B | 33dBm | XX=S1/S0/C0 |
RH78V3-B2700P0-XX | 700/800MHz | Class B | 27dBm | XX=S1/S0/C0 |
BBU Part Numbers | Battery Type | Capacity | Backup Hours |
BBUV3-LFP48030 | Lithium iron phosphate | 30AH | >12H for 110W |
BBUV3-LFP48060 | Lithium iron phosphate | 60AH | >24H for 110W, 12H for 220W |
BBUV3-LFP48100 | Lithium iron phosphate | 100AH | >48H for 110W, 24H for 220W |
License Part Numbers | Configuration | |
RH78V3-L-2733AASS | 27dBm to 33dBm upgrade license | 27dBm to 33dBm upgrade license, for Single Band, Class A units |
RH78V3-L-2733AADD | 27dBm to 33dBm upgrade license, for Dual Band, Class A units | |
RH78V3-L-2733BBSS | 27dBm to 33dBm upgrade license, for Single Band, Class B units | |
RH78V3-L-2733BBDD | 27dBm to 33dBm upgrade license, for Dual Band, Class B units | |
RH78V3-L-3333AASD | Single Band to Dual Band upgrade license | Single band to Dual Band upgrade license, for 33dBm, Class A units |
RH78V3-L-3333BBSD | Single band to Dual Band upgrade license, for 33dBm, Class B units | |
RH78V3-L-2727AASD | Single band to Dual Band upgrade license, for 27dBm, Class A units | |
Not Available | Single band to Dual Band upgrade license, for 27dBm, Class B units | |
RH78V3-L-3333BASS | Class B to Class A upgrade license | Class B to Class A upgrade license, for 33dBm, Single Band units |
RH78V3-L-3333BADD | Class B to Class A upgrade license, for 33dBm, Dual Band units | |
RH78V3-L-2727BASS | Class B to Class A upgrade license, for 27dBm, Single Band units | |
RH78V3-L-2727BADD | Class B to Class A upgrade license, for 27dBm, Dual Band units |
This provides Comba with much lower cost – and in addition, internal manufacturing also allows us to maintain a higher level of quality control and better control over lead times.
In addition, Comba's design team puts forth great efforts to ensure that there is no "over design" of any part of the CriticalPoint products, that could result in unnecessary extra weight or cost.
First, there is a mandatory isolation test that must produce satisfactory results prior to being able to commission the BDA.
Secondly – in the event that something changes the isolation (and causes oscillation) while the BDA is in use, the CriticalPoint BDA will shut down and issue an alarm.
Comba tests and certifies it's products through a Nationally Recognized Test Lab (NRTL) to meet the strict UL requirement standards. Click to view Comba's UL Standards Testing and Product Certification process pdf.
How does this work: our BDA amplifies and passes RF (radio frequency) – RF can carry analog traffic, or it can carry digital packetized traffic. As stated, our BDA is simply amplifying and passing the RF - we do not read, manipulate, or modify, nor really even "see" or know, what the traffic content is.
A way to look at this: consider the BDA and the antenna infrastructure as plumbing in a home or building – all the plumbing does is carry water. The water can be hot water or cold water - or could be potable or non-potable water – the plumbing doesn't care. And in a similar fashion, our BDA does not care what the traffic content over the RF is comprised of.
So how can analog and digital, which are different, be carried simultaneously? The end devices (base station and mobile devices) operate on either analog or digital – meaning that an analog device won't even see the digital traffic, and the digital devices won't even see the analog traffic. So – both types can be mixed over the same RF path with no chance of one interfering with the other.
To minimize or eliminate any call quality issues resulting from using these very narrow channel bandwidths, Comba has released updated firmware for our Class A BDA devices that allows for channel bandwidths of 75KHz. Utilizing a 75KHz channel bandwidth will result in group delay figure of 15usec maximum – which is well within the tolerances required for excellent call quality on P25 Phase II networks. This updated firmware is available directly from Comba and is available on Comba's portal which you can access here: Firmware Download
These kits are available directly from Comba – following is a link to the specification sheet for the kit; the specification sheet also includes the part number and other information necessary to order the kit. Link: BIAS-T KIT FOR NON-TRUNKED RADIO SYSTEMS
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Chrome will now download the generated Report.