Asterisk Support Elastix Support Knowledge Base Security

Keeping the Bots at bay out and allowing your friends in

Recently we have seen an upsurge in Bots attacking Asterisk servers, Interestingly its not good old sipvicious anymore but a Windows program called sipcli and originating mainly from the US and Germany.

Normally our iptables firewalls are updated but for some reason these keep getting through, So we have now based rules on the User-Agent in iptables as well

Here are a few examples to get rid of many of the favourites

-A INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: friendly-scanner" --algo bm --to 65535 -j DROP
-A INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: sipcli" --algo bm --to 65535 -j DROP
-A INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: sipvicious" --algo bm --to 65535 -j DROP
-A INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: VaxSIPUserAgent" --algo bm --to 65535 -j DROP

Also its worth adding these ranges as little good will ever come from them

# Ponytelecom ranges

-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP 
-A INPUT -s -p udp -j DROP

For Freepbx format add following to /etc/firewall-4.rules

-A fpbxreject -s  -m udp -p udp -j DROP
-A fpbxreject -s   -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s  -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP
-A fpbxreject -s -p udp -j DROP

If you are still getting problems check out a sip trace and look for the contact part of the

Contact: <sip:100@xxx.www.rrr.zzz:5070>
Max-Forwards: 70
User-Agent: sipcli/v1.8                       <<<<<<<<<<<<<<<< here it is 
Content-Type: application/sdp
Below is a simple Bash script to create iptables entry for Linux. Create a script and paste the code in , if you just run it it created entries ready for Centos iptables id you run  ‘scriptname freepbx’ it created the entry for /etc/firewall-4.rules
SCANNERS='owenee Custom SIP gazllove pplsip sipcli sipvicious sip-scan sipsak sundayddr friendly-scanner iWar CSipSimple SIVuS Gulp sipv smap friendly-request VaxIPUserAgent VaxSIPUserAgent siparmyknife Test'
if [ "$SYS" != "freepbx" ]
echo This is for a $SYS system
echo Copy and paste below
PROTOS='udp tcp'
for scanner in $SCANNERS; do
for port in $PORTS; do
for proto in $PROTOS; do
if [ "$SYS" = "freepbx" ]
echo -A fpbxreject -p $proto -m $proto --dport $port -m string --string '"User-Agent:' $scanner'"' --algo bm --to 65535 -j DROP
echo -A INPUT -p $proto -m $proto --dport $port -m string --string '"User-Agent:' $scanner'"' --algo bm --to 65535 -j DROP

In this case just set as we have in iptables and it will catch all versions.

Hope this helps you as much as it has helped us

Also this idea can be reversed to only allow user agents (phones) you want to accept.

Here are a few examples of common soft and hardphones

-A ELASTIX_INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: Yealink" --algo bm --to 65535 -j ACCEPT
-A ELASTIX_INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: FPBX" --algo bm --to 65535 -j ACCEPT
-A ELASTIX_INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: Linphone" --algo bm --to 65535 -j ACCEPT
-A ELASTIX_INPUT  -p udp -m udp --dport 5060 -m string --string "User-Agent: DX800" --algo bm --to 65535 -j ACCEPT
-A ELASTIX_INPUT  -p udp -m udp --dport 5060 -m string --string "User-Agent: 3CX" --algo bm --to 65535 -j ACCEPT
-A ELASTIX_INPUT  -p udp -m udp --dport 5060 -m string --string "User-Agent: Grand" --algo bm --to 65535 -j ACCEPT

Again to find others just do a sip trace and note down the user agent.

This can also be extended to make you system more secure by only allowing in devices that register to you FQDN and not just ip address

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
# -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
#ssh moved from 22 to random port
-A INPUT -m state --state NEW -m tcp -p tcp --dport 65432 -j ACCEPT
#Web interface moved to new port.
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8765 -j ACCEPT
#drop sipvicious traffic
-A INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: sipvicious" --algo bm --to 65535 -j DROP
-A INPUT -i eth0 -p udp --dport 5060 -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -i eth0 -p udp --dport 4569 -m state --state ESTABLISHED,RELATED -j ACCEPT
#only allow Yealink phones
-A ELASTIX_INPUT -p udp -m udp --dport 5060 -m string --string "User-Agent: Yealink" --algo bm --to 65535 -j ACCEPT
#That register to your domain name directly
-A INPUT -i eth0 -p udp --dport 5060 -m string --string "REGISTER" --algo bm -j ACCEPT 
#only allow iax from known server
-A INPUT -s -p udp -m udp --dport 4569 -j ACCEPT
-A INPUT -i eth0 -p udp --dport 5060 -j DROP
-A INPUT -i eth0 -p udp --dport 10000:20000 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

The above example should keep you secure. (but things and methods change so keep your eye on the ball)

IPPBXs Products Services

Multi User Hosted PBX

Use the Internet to make calls – it’s simple, cost effective, and perfect for small businesses and call centres.

Voice over Internet telephony reduces telephony bills; connects mobile, remote and office workers; and gives a consolidated impression of your business – same number no matter where employees are located.

From 2 to 10 people wanting to stay in touch, Our feature-rich packages can offer a local or International number from which to operate – or you can bring your old number with you (number porting). There are also a wide range of add-ons that offer inclusive minutes. We can go through setting it up for you or you can do it yourself. To signup follow this link or call us on 01225580025

  • Multi User VoIP £8.00 per month
  • 4000 UK landline minutes £ 20.00 per month Lower amounts available
  • 4000 UK & International landline minutes £25.00 per month
  • 500 UK mobile minutes £30.00 per month

*Prices exclude VAT.

Key features

An online customer control panel allows you to manage your own account, and you can expand the system when ever you need to. All you need to get started is broadband, a router, and an adapter or a VoIP phone.

  • Make immediate savings: Free internal calls. Competitively priced calls and inclusive landline and mobile minutes package add-ons.
  • Quick and easy to set up: No difficult installations.
  • Excellent call quality: With no compromising on functionality.
  • Never be out of touch: Call forwarding available.
  • Keep your old number: Seamless transition with ‘number porting’.
  • Global presence: International numbers available.
  • Stay in control: Online customer administration, call logs and invoicing.
  • Voicemail and voicemail notification
  • Call forwarding to any number including mobiles
  • Online contacts directory, call logs and invoicing
  • Customised CLI (caller line identity)
  • Time of day routing



  • Set up £4.99
  • Monthly £8.00
  • Included phone number UK and International*
  • Concurrent calls per number 2
  • Internal extensions 10
  • Call packages FREE VoIP-to-VoIP
  • 999 Emergency Services access YES
  • Minimum contract length 12 months
  • Voicemail YES
  • Voicemail notification SMS or Email
  • Call forwarding YES
  • Codecs supported G729a, G711u, G711a
  • Online call logs and invoicing YES
  • Online contact directory YES
  • Customised CLI (caller line ID) YES
  • Time of day routing YES
  • Audio call conferencing YES
  • IVR/Auto-attendant YES
  • Music on hold YES
  • Hunt call groups YES
  • 4000 UK landline minutes add-on £20.00 per month
  • 4000 UK & Int. min. add-on £25.00 per month
  • 500 UK Mobile minutes add-on £30.00 per month
  • Additional Number^^ £3.00 per month
  • Personal Number** £10 setup, £10 per month

* Surcharges apply for International numbering.

^ Subject to fair use check at 4000 minutes per month.

^^ Can only point at a Gradwell VoIP number on the same account, they can act as a mainline phone number however they must take an existing route. Please note that they cannot be used to increase concurrent calls.

** Can only point directly at an extension number. You cannot direct these numbers towards hunt groups, call queues or any other type of functionality. Does not provide an additional line.

All phone services (inc Unlimited packages) are subject to Terms and Conditions and standard call charges. All prices exclude VAT. Range of hardware and accessories available.


Knowledge Base


The unit is referred to as the Network Termination Equipment (NTE) or RAD box.

It is used to ‘bond’ the multiple lines that are used on an EFM connection into one circuit. There are RJ45 Network ports on the rear that allow you to plug your own equipment such as routers in.

Front View

The front of the LA-210 includes LED lights that can indicate the state of the unit and the connection.


Rear view

The LA-210 has 4 RJ-45 network ports that the you can plug your own router into.


ls120led LED STATUS

Knowledge Base

VoIP – Per Call Bandwidth

These protocol header assumptions are used for the calculations:

  • 40 bytes for IP (20 bytes) / User Datagram Protocol (UDP) (8 bytes) / Real-Time Transport Protocol (RTP) (12 bytes) headers.
  • Compressed Real-Time Protocol (cRTP) reduces the IP/UDP/RTP headers to 2or 4bytes (cRTP is not available over Ethernet).
  • 6 bytes for Multilink Point-to-Point Protocol (MP) or Frame Relay Forum (FRF).12 Layer 2 (L2) header.
  • 1 byte for the end-of-frame flag on MP and Frame Relay frames.
  • 18 bytes for Ethernet L2 headers, including 4 bytes of Frame Check Sequence (FCS) or Cyclic Redundancy Check (CRC).

Note: This table only contains calculations for the default voice payload

Codec Information Bandwidth Calculations
Codec & Bit Rate (Kbps) Codec Sample Size (Bytes) Codec Sample Interval (ms) Mean Opinion Score (MOS) Voice Payload Size (Bytes) Voice Payload Size (ms) Packets Per Second (PPS) Bandwidth MP or FRF.12 (Kbps) Bandwidth w/cRTP MP or FRF.12 (Kbps) Bandwidth Ethernet (Kbps)
G.711 (64 Kbps) 80 Bytes 10 ms 4.1 160 Bytes 20 ms 50 82.8 Kbps 67.6 Kbps 87.2 Kbps
G.729 (8 Kbps) 10 Bytes 10 ms 3.92 20 Bytes 20 ms 50 26.8 Kbps 11.6 Kbps 31.2 Kbps
G.723.1 (6.3 Kbps) 24 Bytes 30 ms 3.9 24 Bytes 30 ms 33.3 18.9 Kbps 8.8 Kbps 21.9 Kbps
G.723.1 (5.3 Kbps) 20 Bytes 30 ms 3.8 20 Bytes 30 ms 33.3 17.9 Kbps 7.7 Kbps 20.8 Kbps
G.726 (32 Kbps) 20 Bytes 5 ms 3.85 80 Bytes 20 ms 50 50.8 Kbps 35.6 Kbps 55.2 Kbps
G.726 (24 Kbps) 15 Bytes 5 ms 60 Bytes 20 ms 50 42.8 Kbps 27.6 Kbps 47.2 Kbps
G.728 (16 Kbps) 10 Bytes 5 ms 3.61 60 Bytes 30 ms 33.3 28.5 Kbps 18.4 Kbps 31.5 Kbps
G722_64k(64 Kbps) 80 Bytes 10 ms 4.13 160 Bytes 20 ms 50 82.8 Kbps 67.6Kbps 87.2 Kbps
ilbc_mode_20(15.2Kbps) 38 Bytes 20 ms NA 38 Bytes 20 ms 50 34.0Kbps 18.8 Kbps 38.4Kbps
ilbc_mode_30(13.33Kbps) 50 Bytes 30 ms NA 50 Bytes 30 ms 33.3 25.867 Kbps 15.73Kbps 28.8 Kbps

Explanation of Terms

Codec Bit Rate (Kbps) Based on the codec, this is the number of bits per second that need to be transmitted to deliver a voice call. (codec bit rate = codec sample size / codec sample interval).
Codec Sample Size (Bytes) Based on the codec, this is the number of bytes captured by the Digital Signal Processor (DSP) at each codec sample interval. For example, the G.729 coder operates on sample intervals of 10 ms, corresponding to 10 bytes (80 bits) per sample at a bit rate of 8 Kbps. (codec bit rate = codec sample size / codec sample interval).
Codec Sample Interval (ms) This is the sample interval at which the codec operates. For example, the G.729 coder operates on sample intervals of 10 ms, corresponding to 10 bytes (80 bits) per sample at a bit rate of 8 Kbps. (codec bit rate = codec sample size / codec sample interval).
MOS MOS is a system of grading the voice quality of telephone connections. With MOS, a wide range of listeners judge the quality of a voice sample on a scale of one (bad) to five (excellent). The scores are averaged to provide the MOS for the codec.
Voice Payload Size (Bytes) The voice payload size represents the number of bytes (or bits) that are filled into a packet. The voice payload size must be a multiple of the codec sample size. For example, G.729 packets can use 10, 20, 30, 40, 50, or 60 bytes of voice payload size.
Voice Payload Size (ms) The voice payload size can also be represented in terms of the codec samples. For example, a G.729 voice payload size of 20 ms (two 10 ms codec samples) represents a voice payload of 20 bytes [ (20 bytes * 8) / (20 ms) = 8 Kbps ]
PPS PPS represents the number of packets that need to be transmitted every second in order to deliver the codec bit rate. For example, for a G.729 call with voice payload size per packet of 20 bytes (160 bits), 50 packets need to be transmitted every second [50 pps = (8 Kbps) / (160 bits per packet) ]


Bandwidth Calculation Formulas

These calculations are used:

  • Total packet size = (L2 header: MP or FRF.12 or Ethernet) + (IP/UDP/RTP header) + (voice payload size)
  • PPS = (codec bit rate) / (voice payload size)
  • Bandwidth = total packet size * PPS

Yealink T20P the new entry level IP phone

Yealink T20P is the entry level phone, of the Yealink VoIP desk phone range.

The Yealink T20P provides an entry level phone for the Yealink range of VoIP phones. The T20P boasts features beyond what you may expect from the lowest specification of the range. Ideal for use for the home or as a small office phone.

The T20P telephone offers power over ethernet (PoE), two SIP accounts, two line keys and a clear 2x 16 line LCD screen. A cost effective entry level enterprise IP phone with 2 lines.

Strong provisioning is in place for the Yealink range, making the models perfect for ITSP’s or large scale deployments.



  • 2 SIP Accounts
  • 2 Line, 2×16 LCD Display
  • 2 Programmable Keys
  • 5 Hard Function Keys
  • Power over Ethernet (PoE)
  • 3 Way Conference Calls
  • Speakerphone
  • Call Hold, Waiting and Transfer.
  • Wall mountable
  • Compatible with a range of corded headsets:


RRP £69.99 +vat , (Contact us for volume and Special pricing)

Blog Case Studies Knowledge Base

Simple CRM integration.

CRM’s have changed a lot since the days of ACT and Goldmine costing many thousands of pounds, for example a 3 user licence for Goldmine is $2700 and $430 a year, compare that to a SaaS solution, for example Capsule is $12 a month you can see why users are flocking to reasonably prices web solutions.
Capsule being web based is accessible anywhere you want on PC, Tablet or smartphone, it also integrates with other services such as LinkedIn, Twitter or if you wanted Facebook. It integrates with other SaaS products such as Kashflow and Mailchimp to name but a few allowing accounting direct mailing and contacts to all be linked.

capsule-logo-on-blackSo why did we suddenly show interest in these again. Well we were contacted by business who used another CRM package and wished to migrate to Capsule but wanted to be able to call direct from the application. This feature is not available at the moment with Capsule, But we have previously used a Firefox plugin called greasemonkey that can rewrite pages and convert numbers it recognises into clickable links. On investigation there is a similar product for Chrome called Tampermonkey and they are compatible scriptwise. With minor changes to our CyJax dialer script we got this working on elastix as well as a modified version for users of Gradwell‘s hosted VoIP solution. With this script now installed Capsule allows simple click dialing of contacts from the database.

On Asterisk we have automated the updating of the contacts history notes with details of the Call, The notes are linked to the Case or opportunity that you were working on if you dialled out from case notes. Also we can track incoming calls** so that they show up in Capsule, at the moment they show up as a task as you cannot create a History note with out an owner but this hopefully will change if the Capsule API is extended . This means no more trying to remember when you called someone its all there.

We have recently extended this to now log callback requests from callers who dont want to wait in a queue. This additional feature is important as it lets people keep track of the callback requests dialing them, assigning them to a contact and adding further detail.

** To Track incoming calls required changes to the freepbx module in Elastix so that a macro is called on answer, Details on setting this support and patching Elastix is available  here

The scripts are available for free download at you will see that these are only scripts for your browser, If you want the server script for your ippbx please contact us to discuss this.



The snow is coming – and don’t we all just love a snow day?

sledgingWell the school kids might, but for those of us with businesses to run, customers to service, and targets to achieve, the prospect of a heavy snowfall and not being able to reach the office can fill us with dread

The thought of a growing backlog of work can be stressful, but missed sales opportunities can spell disaster. In fact, in recent years, blizzard conditions have been said to cost the UK economy as much as £1.2 billion per day.

Fortunately help is at hand, with VoIP phone services, you can beat the weather by having extensions at home, routing calls to mobiles, using hunt groups and flexible voicemail (delivered to your mobile or email inbox).

You keep your normal business phone number, and what’s more, our business customers find that by switching to, they save their businesses money.

If you have any concerns at all about being cut off from your business during heavy weather, then I know that phone services will make your life easier, save you money, and prevent you from being cut off from your customers.

If any of the above could have an impact on your business then I would be very keen to discuss how we can help, and can reach me on 01225580025 for a no pressure chat about your options (whatever the weather).

For example over the cold snap in Jan 2013 we very quickly enabled a number that could be used by a large school so that parents could text in and the group of people receive the text content by email. This meant parents didnt have to call and wait to be answered or be able to send in an email. At school it meant that the message got to all the relevant people and not having someone huddled round one mobile phone and forwarding messages on.

Calls and Lines Connectivity

EFM Leased Lines

Highly reliable 20Mb symmetrical Internet from £350.00 per month

EFM Leased Lines (Ethernet in the First Mile) provides high speed, reliable internet connectivity for businesses who have outgrown traditional broadband, but where fibre base Ethernet services are still too expensive.EFM uses multiple copper pairs to deliver the service. These are bonded together to provide a combined service. By combining pairs you will receive a much more reliable service because if there is a fault with a single wire then the service will just slow down, rather than taking your business off line.In addition, unlike ADSL where the customer is typically responsible for reporting a fault, with EFM the service is proactively managed by the Gradwell operations centre and where a fault occurs, it is quickly spotted and resolved.Finally, if there is a copper wire fault in the BT Openreach network, EFM is provided with “Service Level 4” which aims to have an engineer resolve the fault within 6 hours.

To order EFM, you will need to contact our sales team. Orders are subject to survey and take between 25 to 90 days to be delivered. EFM is available in 1500 of the most popular UK telephone exchanges and you can be upto approximately 4km from the exchange.

To use EFM, BT Openreach will install a number of analogue copper pairs and associated wall sockets. In addition an EFM network adaptor will be installed, which provides you with an Ethernet socket. You will need to have a spare power socket available within 1M of the BT sockets.

Upgrading EFM

It is not possible to upgrade from 2 Pair EFM to 4 Pair EFM or vice versa. Should you wish to upgrade in the future, you would have to cease your line and reinstall.

We can allow some overlap of the circuits to ensure that you do not lose connectivity in these circumstances, but this may be limited to the number of pairs available as exchange capacity may have changed from the time the original order was placed to the time you wish to upgrade.

EFM Pricing

  • Gradwell EFM services are available on a 1 year or a 3 year contract
  • 3 year deal: 50% discount on installation fee
  • The first months line rental and installation fees are payable upon placing of order
Product 2 Pair EFM 4 Pair EFM
Bandwidth 2Mb to 10Mb 2Mb – 20Mb
Installation £1,200.00 – 1 year contract
50% discount – 3 year contract
£1,650.00 – 1 year contract
50% discount – 3 year contract
Rental £240.00 per month
£2,880.00 per year
£350.00 per month
£4,200.00 per year


All orders of EFM Leased Lines are subject to a contract, which can be downloaded here. Please return any signed contracts by either fax (01225 800 801) or by post to EFM Orders, 26 Cheltenham Street, Bath, BA2 3EX, We can handle all this for you checking teh paperwork and tracking the order.


Cancellation time Cost
 From confirmation of installation date to 5 days before installation 75% of install fee
 From 4 days to 1 day before installation 95% of install fee
From installation to RFS (Ready for Service, approx 10 days) 100% of install fee, plus 100% of year 1 fees


Reason Cost
Visit charge (if not covered by service contract) Various – please refer
to Openreach pricing
Time related charges during installation (if not covered by service contract) Various – please refer
to Openreach pricing
 Excess construction charge (alternate location/additional infrastructure) Various – please refer
to Openreach pricing
 Time related charges during fault repair (if not covered service contract) £80.00 per hour
Special fault investigation (e.g. customer request for an engineer when not needed) £150.00
Aborted visit (e.g. customer not able to grant engineer access) £150.00
All prices are excluding VAT.

Indicative speeds

Like ADSL, the speed an EFM circuit will run at will depend on your distance from the exchange. However, with EFM we can guarantee the minimum speed you will receive1. In our trials, we found that most customers receive a faster speed service than we can guarantee.

EFM is also a symmetrical service – meaning that both the upload and the download speed are the same. This is great if you are making Internet Telephony calls, using video, or sending / uploading large files to the internet.

Distance from local exchange EFM 2 Pair EFM 4 Pair
0m-100m   10Mb 20Mb
 200m – 500m  8Mb 16Mb
 600m – 800m  7Mb 15Mb
 900m – 1100m  7Mb 14Mb
 1200m – 2100m  6Mb 14Mb
 2200m – 2300m  6Mb 13Mb
 2400m  6Mb 12Mb
 2500m  5Mb 12Mb
 2600m – 2700m  5Mb 11Mb
 2800m – 2900m  4Mb 10Mb
 3000m – 3100m  4Mb 9Mb
 3200m  3Mb 8Mb
 3300m  –  8Mb
 3400m  –  7Mb
 3500m – 3600m  –  6Mb
 3700m  –  5Mb
 3800m  – 4Mb
 3900m  –  3Mb
 4000m+  –
 1 If for some reason we are unable to deliver the service at the minimum guaranteed speed, you will have the option to cancel for a full refund, or continue with the slower service.

Redfone FoneBRIDGE

The foneBRIDGE is a T1/E1 PRI-to-Ethernet Bridge. It is an integrated black box appliance designed to streamline installation and enable redundant design of open source telephony based VoIP systems such as Asterisk®, Elastix, Trixbox, FreeSwitch and others.


Failover and HA Enabled
• Flexible Configuration
• Highly reliable design
• Simple Install
• Form factor independent
• Single, Dual, Quad and Octal Port models


• T1/E1 PRI Trunk termination
• Legacy PBX-to-Asterisk integration
• Simple, single server installs
• Complex, HA Asterisk clusters
• Channel Bank connectivity
• Mixed telephony environments (T1 and E1)
• Blade Servers where PCI slots are not available

Download Datasheet here

Price excluding VAT:

  • Non ec Single e1 £430
  • Non ec Dual e1 £850
  • Non ec Quad e1 £1200
  • ec Single e1 £640
  • ec Dual e1 £1200
  • ec Quad e1 £1700
*ec = Hardware echo cancelation
Calls and Lines Connectivity

Fibreline Broadband

Fibreline is a dedicated fibre optic internet connection, with speeds of up to 100Mbps, direct to your business premises. Delivered from the exchange, directly into your business premises, Fibreline provides a superfast business-grade internet connection, giving you the speeds your operations require when you need.

Dedicated connection from exchange to business

Opting for Fibreline at your business premises gives you a dedicated superfast connection to the internet.

Fibreline delivers fibre straight through from the exchange to your business premises. This means that the distance from the exchange is not a problem. Your data travels at the speed of light on a dedicated fibre optic circuit, so there is no opportunity to lose speed through distance from the exchange.

Why is it better than FTTC?

Whereas FTTC (Fibre to the Cabinet) uses constrained hybrid fibre optic cable and existing copper solution from the street cabinet using old copper infrastructure as many other providers, means your connection is subject to frequent changes by engineers of various suppliers.

As Fibreline is a dedicated, private line of fibre optic cable, your internet connection isn’t affected by other providers making changes.