IP phone systems with Issabel, Asterisk or Cisco, connecting branches and external lines.
An old phone system, the cost of calls between branches and limited features.
An IP phone system, external lines and branches connected, and voice quality tuned with QoS.
We pin down the number of extensions, lines and branches.
Internal and inter-branch calls run over the network at no carrier cost, and features such as an auto attendant, call queues, call recording and Follow Me are available.
Yes. Analog lines, E1 or SIP trunks are connected to the phone system.
Yes. With trunks between the phone systems, calls between branches work like internal calls.
Delivered on site for companies, factories, offices and shops across Mazandaran, Iran, and remotely for clients abroad. On-site cities include:
Write a few lines about your current setup and what you need; after a review I will propose the approach and an estimate.
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Calls that drop after a few seconds, one-way audio or phones that keep losing registration: a troubleshooting routine for IP phones, from cabling and PoE to the phone system and NAT.
· 4 min read
Two offices, two Issabel servers and two MikroTik routers: with an encrypted EoIP tunnel and a SIP trunk, the extensions in both offices talk as if on one phone system. Building the tunnel, addressing and routing, the firewall, the Issabel trunk and outbound routes, testing and fixing common errors, step by step.
· 8 min read
When you are away from your desk, Follow Me routes calls to your extension on to your mobile or other extensions. Learn what it is for, how to set it up step by step and the most common mistakes in Issabel.
· 4 min read
With a Ring Group, several extensions share one number and the call reaches whoever is free. Learn the ring strategies, a step-by-step set-up and how it differs from a queue.
· 4 min read
DISA lets you call the phone system from outside, enter a PIN and dial like an internal extension. Read the step-by-step set-up and, more importantly, the security points of DISA in Issabel.
· 4 min read
With an IAX2 trunk between two Issabel servers, extensions at head office and the branch talk to each other for free, as if on one phone system. See both sides of the set-up, the routes, the firewall and troubleshooting step by step.
· 4 min read