ISDN settings in the Module menu will determine how each installed module operates at a particular site. This allows you to copy programs between codecs installed at different locations and separately configure site-specific settings for how each ISDN module should connect. Other answering-related settings are available in the Answering menu via Settings > Answering > [Select ISDN Config].
1.Press the the SETTINGS button, then navigate to Modules and press the
button.
Important Note: You can also configure your ISDN module by pressing the HOME |
2.Navigate to the module you want to configure and press the button. Note: Module 1 is on the left when looking at the codec rear panel.
Important Note: ISDN Sync should be displayed when an ISDN line is connected to the codec. This appears regardless of whether you have configured the ‘ISDN Line Type’ correctly. |
3.Navigate to Accept and press the button. This menu is a call filter to allow or deny voice or data calls according to your preferences. The default setting allows both Voice & Data. Select your preferred option and press the
button.
Important Note: G.711 is the default algorithm for incoming connections when Voice Only is selected. There are two G.711 algorithms and the one used by the codec depends on the country setting in the codec. The µ-law algorithm is used in the USA, Japan and Canada, whereas the A-law algorithm is used in other countries. |
4.Navigate to Network and press the button. Select the Network Type corresponding to the region in which you are using the codec, then press the
button.
Networks |
Select |
US-Nat |
If switch type is National ISDN-1 and 2 |
US-AT&T |
If switch Type is AT&T 5ESS |
EU-ETSI |
If Switch Type is ETSI (UK, Europe, Australia and most other countries) |
JPN-NTT |
If you are in the Japan and your network is NTT |
5.Navigate to Line Type and press the button. Ask your Telco whether your ISDN line is Point-to-Point or Point-to-Multipoint. By default select Point-to-Multipoint, unless your switch type is point-to-point, your Telco says the line is point-to-point, or you are connected to a PABX system. Most PABX systems are point-to-point. Next, press the
button.
6.If you are in the US enter DN and SPID numbers as required, or in other regions enter DN or MSN numbers as required. Navigate to each DN, SPID or MSN and press the button before entering each number, then press the
button to store each number.
8.Navigate up to Apply Settings and press the button to apply all module settings.
Important Notes:
Directory Numbers and Multiple Subscriber Numbers Directory Numbers (DN) in North America and Multiple Subscriber Numbers (MSN) in the rest of the world are simply phone numbers associated with an ISDN B channel, like lines listed in a typical phone directory. Your Telco will normally supply 2 DN/MSN numbers for each pair of B channels. However, these numbers may or may not be associated with a specific B channel.
Often broadcasters prefer to predict which B channel will answer an incoming call to ensure audio routing is consistent. However, if a DN or MSN number is not entered in the codec and multiple B channels are available, the codec may use any channel to answer an incoming call. To ensure calls are routed consistently, enter a DN/MSN number (without the country or area code) as the DN/MSN for a B channel, then only that corresponding B channel will answer an incoming call to that number. Programming DN/MSN numbers for each B channel allows the codec to ignore calls without matching DN/MSN numbers. This is the best way to answer calls from codecs in a predictable manner.
SPID Numbers in North America ISDN relies on an initialization procedure for associating Service Profiles with specific terminating equipment (e.g. your audio codec) rather than lines. In the US Telcos assign a Service Profile ID (SPID) number which assists in identifying different ISDN services across the network. Your Telco must provide a SPID for each B channel you order when connecting over US-Nat or US-AT&T networks in the US. A SPID is not required when using the AT&T PTP protocol.
Typically, each ISDN BRI service in the US will have two SPIDs and these must be entered correctly. When you enter a SPID into your codec and connect it to an ISDN line, an initialization and identification process takes place, whereby the terminating equipment (your codec) sends the SPID to the switch. The switch then associates the SPID with a specific Service Profile and directory number.
Note: SPID numbers normally include the phone number and additional prefix or suffix digits up to 20 digits long. |